M02061_技术文档

M02061

3.3 or 5 Volt Laser Driver

The M02061 is a highly integrated, programmable laser driver intended for SFP/SFF modules. Using differential

PECL data inputs, the M02061 supplies the bias and modulation current required to drive an edge-emitting laser.

The modulation output can be DC coupled to the laser diode.

The M02061 includes automatic power control to maintain a constant average laser output power over temperature

and life. In addition, the modulation current can be temperature compensated to minimize variation in extinction ratio

over temperature.

Applications

Features

• SFP and SFF Modules

• 1G/2G/4G Fibre Channel modules

• High-speed operation; suitable for SFP/SFF applications.

Typical rise/fall times of 55 ps.

• Programmable temperature compensation. Modulation output and

bias output can be controlled using a few discrete resistors.

• Supports DDMI (SFF-8472) diagnostics

• Short reach and Metro SONET/SDH

• CPRI: 614.4, 1228.8, 2457.6, 3072.0, 4915.2 and 6144.0 Mbit/s

• DC or AC coupled modulation drive. Up to 100 mA modulation

current available when AC coupled.

• Low overshoot allows high extinction ratio with low jitter

• Automatic laser power control, with “Slow-Start”

• PECL and CML compatible differential data inputs

• Complies with major MSAs (GBIC, SFF, SFF-8472, SFP) including

timing requirements

• Packaged in a QFN24

• 3.3 V or 5 V operation

• Pulse width adjustment

Typical Applications Diagram

V

CC

V_CC

V_CC3

V_CC

Internal Power Bus

SV

CC

Internal

3.3V reg.

OUT-

D

IN

+

Laser

Driver

Input

Buffer

Output

Buffer

OUT+

D - FF

D

-

IN

GND

0

V_CC3-1.3V

IBIAS

OUT

IPIN

Input

Buffer

Safety

Circuitry with

Latched Fault

TX

Disable

Modulation

Control

Automatic Power Control

(laser bias current)

V_CC3

V_CC

(M02061-12

only)

(M02061-21

only)

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Ordering Information

Part Number

Package

Pin Confitguration

M02061-12

M02061G-12*

M02061-21

QFN24

QFN24 (RoHS Compliant)

QFN24

DISDLY function on pin 8

SCB function on pin 8

DISDLY function on pin 8

M02061G-21*

M02061-EVM

QFN24 (RoHS Compliant)

Combination Optical and Electrical Evaluation board

*The G in the part number indicates that this is an RoHS compliant package. Refer to www.mindspeed.com for additional information.

Revision History

ASIC

Revision

Level

Date

Description

G

Release

July 2012

x

Added recommendation for 100 k Ω pull-up resistor at pin 14 IBIASout when pin 18

SVCC is used to control laser current.

F

Release

February 2010

February 2006

x

Added CPRI data rates to front page.

Added T specification and added equation for T specification in Table 1-1.

J

A

E

Release

x

Added information for the M02061-21 with pin SCB instead of pin DISDLY.

New format. Remove 32 pin package information.

D

September

2005

Changes to Absolute Maximum Specifications - operating temperature, output voltage.

Changes to Recommended Operating Conditions - VCC, operating temperature.

Changes to DC Characteristics - ICC, VMD, TxPWRmon, logic inputs and outputs, data

inputs, safety logic thresholds.

Changes to AC Characteristics - IMOD, Tr, Tf, jitter.

Added eye diagram, ; corrected rise/fall times.

C

Preliminary

March 2004

x

2.5Gbps Electrical Eye Diagram

QFN24 Pin Configuration

19

24

V_CC

1

18

SV_CC

OUT-

OUT+

DIN+

DIN-

VCC3_SEL

DIS

GND₀

GND, connect to

PCB ground

IBIAS_OUT

I_PIN

6

13

FAIL

7

12

Conditions: 80mA modulation current, 2^7-1 PRBS

4mm x 4mm

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1.0 Product Specification

1.1

Absolute Maximum Ratings

Table 1-1.

Absolute Maximum Ratings

Symbol

Parameter

Rating

Units

V

Power supply voltage

-0.4 to +6.0

V

CC

1

T

Junction temperature

°C

J

-40 to +110

-0.4 to +4.0

V

3.3V power supply voltage

Operating ambient temperature

Storage temperature

V

°C

mA

V

CC3

2

T

-40 to +95

A

T

-65 to +150

150

STG

BIASOUT (MAX)

I

Maximum bias output current

Maximum modulation current

Data inputs

I

140

MOD (MAX)

D +/-

0 to V + 0.4

CC3

IN

DIS, SCB, VCC3

Mode control inputs

-0.4 to V + 0.4

V

SEL

CC

BIAS

, MOD

Bias and modulation output current mirror

compliance voltage

-0.4 to V + 0.4

V

MON

CC3

IPIN

Photodiode anode voltage

Photo diode current

Status flags

-0.4 to V + 0.4

V

mA

V

CC3

IPIN

FAIL

2

-0.4 to V + 0.4

CC

PWA, APC , MOD

Set inputs

-0.4 to V + 0.4

V

SET

CC3

TC

Temperature compensation start temperature

Temperature compensation slope

Output

-0.4 to 1.0

V

START

TC

-0.4 to V + 0.4

V

SLOPE

CC3

OUT+, OUT-

-0.4 to V + 0.4

V

CC

1. QFN package:

Air Velocity

0 m/s

θ

JA

57 ºC/W

50 ºC/W

45 ºC/W

1 m/s

2.5 m/s

The above thermal resistance is based on a 4-layer JEDEC standard board (76.2 x 114.3 mm).

2. The maximum operating ambient temperature is the lesser of 95 °C or T ≤ T (Max) - (θ (Max) x Q) where Q is the power dissipated

A

J

JA

in the M02061.

These are the absolute maximum ratings at or beyond which the IC can be expected to fail or be damaged.

Reliable operation at these extremes for any length of time is not implied.

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Product Specification

1.2

Recommended Operating Conditions

Table 1-2.

Recommended Operating Conditions

Parameter

Rating

Units

Power supply (V -GND)

3.3 ± 7.5%

V

CC

or 5.0 + 8%, -5%

Operating ambient

-40 to + 95

°C

1.3

DC Characteristics

(V = +3.05V to +3.55V or 4.75V to 5.4V, T = -40 °C to +95 °C, unless otherwise noted)

CC

A

Typical values are at V = 3.3 V, I

= 30 mA, I

= 30 mA, T = 25 °C, unless otherwise noted.

CC

BIASOUT

MOD A

Table 1-3.

DC Characteristics (1 of 3)

Symbol

Parameter

Conditions

Minimum Typical

Maximum

Units

I

Supply current excluding

PWA high (no pulse width adjust)

–

35

1.5

61

mA

CC

I_MODand I

BIAS

additional current when PWA used

-

additional current when operating from a 5V

supply

-

I

Bias current adjust range

V(I

) > 0.7V

mA

µA

BIAS

BIASOUT

For 3.3V operation with an AC coupled laser

For 5.0V operation with a DC coupled laser.

1

100

60

I

Bias current with optical

output disabled

DIS = high

–

300

BIAS(OFF)

V(I

) > V - 1V

CC

BIASOUT

Ratio of I

current to

current

–

100

–

A/A

V

BIAS

MON

V

Monitor diode reverse bias

voltage

V

=3.3V

1.5

10

–

MD

CC

I

Monitor diode current

adjustment range

Adjusted with R

–

1500

1.25

µA

A/A

MD

APCSET

Ratio of TxPwr

current

0.95

1

MON

to monitor photodiode

current

C

Maximum monitor

100

5.4

pF

V

MD_MAX

photodiode capacitance for

APC loop stability. Includes

all associated parasitic

capacitances.

TTL/CMOS input high

voltage (DIS)

2.0

–

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Product Specification

Table 1-3.

DC Characteristics (2 of 3)

Symbol

Parameter

Conditions

Minimum Typical

Maximum

Units

TTL/CMOS input low

voltage (DIS)

–

2.4

1.2

–

0.8

V

CMOS input high voltage

V

(VCC3 , SCB)

SEL

CMOS input low voltage

(VCC3 , SCB)

SEL

Logic output high voltage

(FAIL)

With external 10kΩ pull-up to V .

V

- 0.5

–

CC

Logic output low voltage

(FAIL)

For 6.8k to 10k Ω resistor when pulled up to

5V.

–

0.4

For 4.7k to 10k Ω resistor when pulled up to

3.3V.

R

Differential input impedance Data inputs

–

6800

–

Ω

IN

V

Self-biased common-mode

input voltage

V

- 1.3

V

SELF

CC3

V

Common-mode input

compliance voltage

Data inputs

V

- 1.45

–

V

-[V ]/4

IN(Diff)

V

INCM

CC3

V

Differential input voltage

= 2 x (D +

- D + )

IN LOW

200

2.5

–

2400

mVpp

V

IN(DIFF)

(1)

IN HIGH

V

3.3V supply detection, lower

threshold

2.8

3.0

4.25

4.65

6.1

CC3THL

(1)

CC3THH

V

3.3V supply detection,

upper threshold

3.65

3.9

4.25

5.8

1.3

1.0

V

5V supply detection, lower

threshold

CC5THL

V

5V supply detection, upper

threshold

5.4

CC5THH

V

Reference voltage for

1.18

1.4

REF1

MOD

SET

V

Reference voltage for

APC

APCSET

SET

V

Bias_OK lower voltage

threshold

0.88

1.05

BL

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Table 1-3.

DC Characteristics (3 of 3)

Symbol

Parameter

Conditions

Minimum Typical

Maximum

Units

V

Bias_OK upper voltage

threshold

1.45

1.6

1.7

V

BH

V

Lower voltage threshold for FAIL asserts if any of these signals fall below

fault inputs I , OUT+, this value.

300

400

2.2

mV

FAULTL

BIASOUT

C

, AND MOD

APC

SET

V

Self bias voltage for

and OUT+

DIS = high

DIS = low, I

0.5

1.65

V

OUT_DIS

I

BIASOUT

V

SHDWN

output low

≤ 100uA

≤ 10uA

V - 4

CC

SHDWNL

OUT

SHDWNOUT

voltage

V

SHDWN

output high

V - 0.3V

CC

SHDWNH

OUT

voltage

NOTES:

1. When V = 5V, V “supply OK” circuitry monitors the internally regulated 3.3V supply. When V = 3.3V, V “supply OK” circuitry monitors

CC

CC3

CC

CC3

V .

CC

1.4

AC Characteristics

(V = 3.05 V to 3.55V or 4.75V to 5.4V, T = -40 °C to +95 °C, unless otherwise noted)

CC

A

Typical values are at V = 3.3 V, I

= 30 mA, I

= 30 mA, 25 ohm load and T = 25 °C, unless otherwise

CC

BIASOUT

MOD A

noted.

Table 1-4.

AC Characteristics (1 of 2)

Symbol

Parameter

Conditions

Minimum Typical Maximum

Units

I

Modulation current range

3.3V operation, AC coupled, OUT+ and OUT-

>1.6V

10

–

100

mA

MOD

(1)

5V operation, DC coupled into a 25Ω load to

10

–

80

VCC - 1.2V. OUT+ and OUT- >1.15V

DIS = high

I

Modulation current with output

disabled

–

100

–

300

µA

A/A

MOD(OFF)

Ratio of modulation current to

–

0

–

MOD

current

MON

(2)

4

I

Programmable range for modulation Adjustable using TC

10

ppm/°C

MOD-TC

SLOPE

current temperature coefficient

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Table 1-4.

Symbol

tr

AC Characteristics (2 of 2)

Parameter

Conditions

Measured using 11110000 pattern at 2.5Gbps

into 25 Ω load

Minimum Typical Maximum

Units

Modulation output rise time

Modulation output fall time

20% to 80% into 25 Ω.

–

55

75

ps

tf

–

55

1

75

–

ps

%

(2)

OS

Overshoot of modulation output

current in the off direction.

--

RJ

DJ

Random jitter

–

0.8

–

ps

rms

31

Deterministic jitter

Measured into 25Ω load, 2 - 1 PRBS at 2.7

ps

pp

Gbps

10

25

30

K28.5 pattern at 4.25 Gbps

3

(includes pulse width distortion )

NOTES:

1. Guaranteed by design and characterization.

2. DC coupled operation at 3.3V is not supported. AC coupled operation at 5V is possible provided the outputs never exceed 6V.

3. Pulse width distortion is measured single-ended.

1.5

Safety Logic Timing

(SCB pin low, V = 3.05 V to 3.55V or 4.7V to 5.4V, T = -40 °C to +95 °C, unless otherwise noted)

CC

A

Table 1-5.

Symbol

t_off

Safety Logic Timing (1 of 2)

Parameter

Conditions

Minimum Typical Maximum

Units

DIS assert time

DIS negate time

Time to initialize

Rising edge of DIS to fall of output signal

below 10% of nominal

10

μs

(1)

t_on

Falling edge of DIS to rise of output signal

above 90% of nominal

1

ms

(1)

(2)

t_init

Includes reset of FAIL; from power on after

Supply_OK or from negation of DIS during

reset of FAIL condition

2

3

5

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Product Specification

Table 1-5.

Symbol

t_fault

Safety Logic Timing (2 of 2)

Parameter

Conditions

Minimum Typical Maximum

Units

Laser fault time - from fault condition From occurrence of fault condition or when

100

μs

to assertion of FAIL

Supply_OK is beyond specified range

(3)

t_reset DIS time to start reset

DIS pulse width required to initialize safety

circuitry or reset a latched fault

10

μs

ns

t

Supply_OK delay time

Delay between Supply_OK condition and when

outputs are enabled

10

20

VCC_OK

t_on

DIS negate (turn-on) time during

burst-mode operation

I

> 20mA; outputs DC coupled (5V

300

200

500

BM

MOD

(4)

operation)

t_off

DIS assert (turn-off) time during

burst-mode operation

I

MOD

> 20mA; outputs DC coupled (5V

BM

operation)

NOTES:

1. With CAPC < 2.2nF

2. User-adjustable. Specifications reflect timing with no external RESET capacitor.

3. With < 1nF capacitor from RESET pin to ground.

4. Imod >12mA

Figure 1-1. Relationship between Data Inputs and Modulation Outputs

D

+

IN

100 mV -

1200 mV

D_IN-

200 mV -

2400 mV

V

IN(DIFF)

V

OUT-

V

OUT+

> 1.60Vwhen V_{CC5_OR}high

> 1.15V when V_{CC5_OR}low

GND

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Product Specification

Figure 1-2. Safety Logic Timing Characteristics, SCB pin low

Slow Rise on Vcc = 5V at Power-up (DIS Low)

Hot Plug (DIS Low)

5V

V_CC3

and

V_CC5

status

V_CC

V

“OK”

_CC3and V_CC5

3.3V

V_CC3

(low)

FAIL

DIS

(low)

FAIL

DIS

t_on < 1ms,

(300 μs typ.)

t_on < 1ms,

(300 μs typ.)

LASER

OUTPUT

LASER

OUTPUT

Slow Rise on Vcc=3.3V at Power-up (DIS Low)

Transmitter Enable (DIS transition Low)

3.3V

V_CC3

and

V_CC5

V_CC3and V_CC5

“OK”

V_CC

(high)

3.3V

status

V_CC3

FAIL state at power-up will

depend on pull-up voltage

(low)

FAIL

DIS

(low)

FAIL

DIS

(low)

t_on < 1ms,

(300 μs typ.)

t_on < 1ms,

(300 μs typ.)

LASER

OUTPUT

LASER

OUTPUT

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Product Specification

Transmitter Disable (DIS transition high)

Fault Recovery Behavior

Fault

recovery at:

(high)

V_CC3

and

V_CC5

status

V_CC3and V_CC5

“OK”

Fault

Removed

MOD_SET

.

C_APC, OUT+,

or IBout

FAIL remains high

until reset by DIS

going high

FAIL

DIS

(low)

FAIL

DIS

t_reset,

10 μs,

min.

t_off < 10 μs,

(1 μs typ.)

t_on < 1ms

LASER

OUTPUT

LASER

OUTPUT

Response to Fault

Unsuccessful Fault Reset Attempt

Fault Occurs

Fault at:

MOD_SET

_APC, OUTP,

or IBout

.

Fault Remains

Fault at:

APC_SET

C

t_fault < 100 μs,

(4 μs typ.)

t_init < 5ms,

(3ms typ.)

FAIL

DIS

t_reset,

10 μs,

min.

LASER

OUTPUT

LASER

OUTPUT

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2.0 Pin Definitions

Table 2-1 lists pin type definitions and descriptions for the M02061 device.

Table 2-1.

M02061 Pin Definitions and Descriptions (1 of 7)

4x4 mm

QFN24 Pin Pin Name

Number

Pin equivalent load

Function

1

2

V

Power supply

Positive data input. Self biased. Compatible with AC coupled PECL, AC

CC

D +

IN

V

CC3

V

coupled CML, and DC-coupled PECL (V = 3.3V).

CC

When D + is high, OUT+ sinks current.

IN

V

TT

4 kΩ

D

+, D -,

IN IN

or

CLK+, CLK-

3

4

D -

See D + drawing

Negative data input. Self biased Compatible with AC coupled PECL, AC

IN

coupled CML, and DC-coupled PECL (V = 3.3V).

CC

VCC3

3.3V V Select.

CC

SEL

V

CC

CC3

Connect to V for V = 3.3V operation.

CC3

CC

Connect to GND for V = 5V operation.

CC

V

_{CC5_}OR

190 Ω

72 kΩ

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Pin Definitions

Table 2-1.

M02061 Pin Definitions and Descriptions (2 of 7)

4x4 mm

QFN24 Pin

Number

Pin Name

Pin equivalent load

Function

5

DIS

Bias and modulation output disable (TTL/CMOS).

V

CC

V

CC3

7 kΩ

DIS

80 kΩ

6

FAIL

Safety circuit control failure output (TTL/CMOS). Goes high when a safety

logic fault is detected. This output will be low when DIS is high.

V

CC

FAIL

7

RESET

Safety circuit reset. Leave open for normal operation or add a capacitor to

ground to extend the reset time.

V

CC

CC3

Connect to GND to disable window comparators at APC

SET

RESET

190 Ω

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Pin Definitions

Table 2-1.

M02061 Pin Definitions and Descriptions (3 of 7)

4x4 mm

QFN24 Pin

Number

Pin Name

Pin equivalent load

Function

8

SCB

Safety Circuit Bypass. Connect to GND or leave open for normal operation.

Connect to VCC to allow the bias and modulation outputs to operate even if

the safety circuitry indicates a fault.

V

CC3

CC

(M02061-21

only)

SCB

24 kΩ

48 kΩ

8

DISDLY

Disable delay control. Connect to ground for normal operation. In burst mode

operation add a capacitor from this pin to ground to set the maximum disable

time. Disable times greater than this maximum will engage the “slow-start”

circuitry.

V

CC

(M02061-12

only)

DISDLY

190 Ω

9

MOD

Modulation Current Monitor. Connect directly through a resistor to GND

MON

V

CC

V

(MON high) or to V (MON low). The current through this pin is

POL

CC3

POL

CC3

approximately 1/100th of the MODULATION current to the laser.

This pin may be left open if the feature is not needed and the M02061 current

consumption will be reduced by 0.5mA typically.

MOD

MON

190 Ω

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Pin Definitions

Table 2-1.

M02061 Pin Definitions and Descriptions (4 of 7)

Pin Name Pin equivalent load

4x4 mm

QFN24 Pin

Number

Function

10

11

BIAS

See MOD

drawing

Bias Current Monitor. Connect directly through a resistor to GND (MON

POL

MON

high) or to V (MON low). The current through this pin is approximately

CC3

POL

1/100th of the BIAS current to the laser.

This pin may be left open if the feature is not needed and the M02061 current

consumption will be reduced by 0.5mA typically.

TxPwr

Transmit Power Monitor. Connect directly through a resistor to GND

MON

V

CC

V

(MON high) or to V (MON low). The current through this pin is

CC3

POL

CC3

POL

approximately the same as the photo diode current into IPIN.

This pin may be left open if the feature is not needed and the M02061 current

consumption will be reduced by the IPIN current.

TxPwr

MON

33 Ω

12

APC

Average Power Control, laser bias current adjustment. Connect a resistor

between this pin and ground to set the bias current to the laser.

SET

V

CC

V

CC3

The APC loop will control the laser bias current to maintain a voltage of

approximately 1.3V at this pin. The current through this pin is approximately

the same as the current into I

.

APC

SET

13

I

Current input from monitor photodiode anode.

V

CC

The APC loop will adjust the laser bias current to maintain a voltage at

APC of approximately 1.3V and at this pin of approximately one V . The

SET

GS

voltage at this pin will not exceed 1.6V in normal operation

I_PIN

30 Ω

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Pin Definitions

Table 2-1.

M02061 Pin Definitions and Descriptions (5 of 7)

4x4 mm

QFN24 Pin

Number

Pin Name

Pin equivalent load

Function

14

IBIAS

Laser bias current output.

OUT

V

CC

Connect directly to laser cathode or at higher bit rates through a ferrite or a

resistor to isolate the capacitance of this pin from the modulation drive,

(~2pF).

Maintain a voltage > 0.7V at this pin.

IBIAS

OUT

Connect 100 kΩ pullup resistor to VCC if pin 18 (SVCC) is used.

15

GND

Ground for output stage. May be connected directly to ground. At high bit

rates (>2Gb/s) an optional inductor or ferrite may be added to reduce

switching transients.

O

V

CC

GND

0

16

OUT+

Positive modulation current output. Sinks current when D + is HIGH.

IN

V

CC

Maintain a voltage > 1.6V at this pin when VCC3

is high.

SEL

Maintain a voltage > 1.15V at this pin when VCC3 is low.

SEL

OUT+

GND

0

17

OUT-

See OUT+ drawing

Negative modulation current output. Sinks current when D - is HIGH

IN

Maintain a voltage > 1.6V at this pin when VCC3

is high.

SEL

Maintain a voltage > 1.15V at this pin when VCC3 is low.

SEL

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Pin Definitions

Table 2-1.

M02061 Pin Definitions and Descriptions (6 of 7)

4x4 mm

QFN24 Pin

Number

Pin Name

Pin equivalent load

Function

18

19

20

SV

Switched V .

CC

V

CC

V

3.3V applications - Connect to laser anode. Safety circuitry will open the

switch when a fault is detected and no current will flow through the laser.

CC3

No capacitance is needed on this node. If capacitance to ground is added, do

not exceed 100 pF.

SV_CC

5V applications - Disabled, leave open.

SHDWN

External switched V control signal. Use in 5V applications to create an

CC

OUT

V

CC

external SV

CC.

12 kΩ

SHDWN

OUT

C

Automatic power control loop dominant pole capacitor. (Connect a capacitor

between this pin and V .)

APC

V

CC

CC3

A 2.2 nF capacitor will give less than 1ms enable time and a loop bandwidth <

30kHz.

C_APC

100 Ω

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Pin Definitions

Table 2-1.

M02061 Pin Definitions and Descriptions (7 of 7)

Pin Name Pin equivalent load

4x4 mm

QFN24 Pin

Number

Function

21

V

3.3V applications - Power supply input. Connect to V .

CC3

CC

V

CC

5V applications - Internally generated 3.3V. Power supply output. Do not

attach to non-M02061 circuitry.

For 5 V applications add 12 ohms in series with 100 nF to ground at this pin.

V

CC3

22

PWA

Pulse Width Adjust. Connect a resistor to GND to enable, (between 1kΩ and

V

CC

CC3

20kΩ). Connect to V to disable.

CC3

+

-

1.28V

PWA

190 Ω

23

24

MOD

See PWA drawing

Modulation current control. Connect a resistor to ground to set the

modulation current.

SET

TC

Modulation current temperature compensation coefficient adjustment.

Connect a resistor to ground to set the temperature compensation

coefficient. Leave open to disable the temperature compensation.

SLOPE

A 51 kΩ resistor will result in a temperature compensation slope of

approximately 0.5%/°C.

CENTER

PAD

GND

Connect to GND.

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Pin Definitions

Figure 2-1. QFN24 Pinout Information

19

24

V_CC

1

18

SV_CC

OUT-

OUT+

DIN+

DIN-

VCC3_SEL

DIS

GND₀

GND, connect to

PCB ground

IBIAS_OUT

I_PIN

6

13

FAIL

7

12

4mm x 4mm

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3.0 Functional Description

3.1

Overview

The M02061 is a highly integrated, programmable laser driver intended for SFP/SFF module with data rates up to

4.25 Gbps. Using differential PECL data inputs, the M02061 supplies the bias and modulation current required to

drive an edge-emitting laser.

Monitor outputs and internal safety logic in the M02061 combined with the M02088 will support designs requiring

DDMI compliance.

The M02061 includes automatic power control to maintain a constant average laser output power over temperature

and life. In addition, the modulation current can be temperature compensated to minimize variation in extinction

ratio over temperature.

Many features are user-adjustable, including the APC (automatic power control) loop bias control (via a monitor

photo diode), modulation current, temperature compensation control of modulation current, and pulse-width

adjustment. The part may be operated from a 3.3V or 5V supply.

The driver modulation output can be AC, DC, or Differentially coupled to the laser.

Safety circuitry is also included to provide a latched shut-down of laser bias and modulation current if a fault

condition occurs. An internal V switch provides redundant shutdown when operating the device from a 3.3V

CC

supply. Control is provided to allow for a redundant external switch when operating with a 5V supply, if desired.

Figure 3-1 details the functional blocks and pin signals for the M02061 device.

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Functional Description

Figure 3-1. M02061 Block Diagram

Internal Power Bus

Internal

SV

CC

3.3V reg.

OUT-

OUT+

D +

IN

Output

Buffer

Laser

Driver

Input

Buffer

D - FF

D

-

IN

GND

0

V_CC3-1.3V

IBIAS_OUT

IPIN

Safety

Circuitry with

Latched Fault

TX

Disable

Modulation

Control

Automatic Power Control

(laser bias current)

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Functional Description

Figure 3-2. 2.5Gbps Electrical Eye Diagram

7

Conditions: 80mA modulation current, 2 -1 PRBS

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Functional Description

Figure 3-3. 2.5Gbps Filtered Optical Eye Diagram with NEC NX7315UA Laser

7

Conditions: 10dB extinction ratio, 33% eye margin, 2 -1 PRBS

Figure 3-4. 4.25Gbps Unfiltered Optical Eye Diagram with Archcom AC3460 Laser

7

Conditions: 7.5dB extinction ratio, 2 -1 PRBS

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Functional Description

3.2

Features

•

High speed operation; suitable for SFP/SFF applications from 155Mbps to 4.25 Gbps. Typical rise/fall times of

55 ps.

•

Programmable temperature compensation. Modulation output and bias output can be controlled using a few

discrete resistors.

•

Supports DDMI (SFF-8472) diagnostics when combined with the M02088.

DC or AC coupled modulation drive. Up to 100mA modulation current available when AC coupled.

Low overshoot allows high extinction ratio with low jitter.

Automatic Laser Power Control, with “Slow-Start”.

Differential data inputs to minimize pattern dependent jitter, PECL and CML compatible.

Packaged in a QFN24

3.3V or 5V operation

3.3

General Description

The M02061 is a highly integrated, programmable laser driver intended for SFP/SFF module with data rates up to

4.25 Gbps. Using differential PECL data inputs, the M02061 supplies the bias and modulation current required to

drive an edge-emitting laser. Monitor outputs and internal safety logic support the DDMI requirements.

The M02061 laser driver consists of the following circuitry: an internal regulator, bias current generator and

automatic power control, data inputs, buffer with pulse width adjust, modulation current control, modulator output,

laser fail indication, disable control, and monitor outputs for the bias current, modulation current, and transmitted

power.

3.3.1

Internal Regulator

The M02061 contains an internal 3.3V regulator so high bit rate performance can be achieved with 5V or 3.3V

power supply.

When operating from a 5V supply (V is connected to +5V), an internal regulator provides a voltage of

CC

approximately 3.3V to the majority of the on-chip circuitry. The on-chip regulator is internally compensated,

requiring no external components. However, for 5V operation with high modulation currents, it may be necessary to

add 12 ohms in series with 100nF to ground at VCC3 or the internal power supply may dip and cause a fault

condition. When a 3.3V supply is used (V and V

connected to 3.3V) the regulator is switched off and the

CC

CC3

internal circuitry is powered directly through the V

supply pin. The decision as to whether or not the internal

CC3

regulator is required is made via the VCC3

monitor for proper +5V supply voltage.

pin, which also determines whether the safety circuitry needs to

SEL

For 3.3V applications, SV is sourced from V

through a switch (leave SV open for 5V applications). SV is

CC CC

CC

CC3

to be used to power the anode of the laser diode and the cathode of the photo diode, any resistive or ferrite pull-ups

on the OUT+ and OUT- outputs should be connected directly to VCC. When a fault condition is present, FAIL will

assert and the switch sourcing SV will open so no current can pass through the laser. SV does not need any

CC

external capacitance, if capacitance to ground is added at SV it should be <100 pF. When SVCC is used, add a

CC

100k Ω pullup resistor to VCC at pin 14 (IBIASout).

For 5V operation, an analog switch controlled by SHTDWNOUT can be used to source 5V to the laser anode. In

the case of a fault condition, SHTDWNOUT will go high and open the analog switch which will result in an open

circuit at the laser. SHTDWNOUT is designed to drive a CMOS logic input. An FET transistor may have excessive

Miller capacitance and a fault may be signalled if it turns on too slow.

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Functional Description

V

and V

status are internally monitored by the M02061 during power-up and normal operation. During

CC3

CC

power-up the “slow-start” circuitry requires that V and V

each reach an acceptable level before enabling bias

CC

CC3

or modulation current.

Table 3-1.

Pin Connection for 3.3V and 5V V

CC

Pin Connection For:

V_CC= 3.3V

V_CC= 5V

Connect to V

Reference for C and PWA

CC

APC

V

CC3

Laser Anode

OPEN

SV

CC

External safety control switch

SHDWN_OUT

C_APC

Capacitor between C and V or V Capacitor between C and V (not V )

APC

CC3

CC

APC

CC3

CC

Connect to V or V to disable

Connect to V to disable (not V )

CC3 CC

CC3

CC

PWA

Connect to V or V

Connect to GND

CC3

CC

VCC3

SEL

3.3.2

Bias Current Generator and Automatic Power Control

To maintain constant average optical power, the M02061 incorporates a control loop to compensate for the

changes in laser threshold current over temperature and lifetime. The bias current will be determined by the value

of the external resistor R and the transfer efficiency between the laser and monitor photo diode.

APCSET

The photo current from the monitor photo diode mounted in the laser package is sunk at I . This photo current is

mirrored and an equivalent current is sourced from pins TxPwr

and APC . The APC loop adjusts the laser

MON

SET

bias current (hence the monitor diode photo current) to maintain a voltage at APC

~1.3V.

of 1 band-gap voltage or

SET

R

* I

= 1.3 V

APCSET

The APC loop has a time constant determined by C

R

and the transfer efficiency between the laser and

APC, APCSET

monitor photo diode. The larger the C

lower the loop BW.

capacitor the lower the bandwidth of the loop and the larger R

the

APC

APCSET

In general, it is recommended that at least 2.2 nF of external capacitance be added externally between C

and

APC

V

. With use of a 2.2 nF capacitor, the bias current can reach 90% of its final value within 1ms, i.e., bias current

CC3

rise-time is less than 1ms and the APC loop bandwidth is less than 30 kHz, which should be adequate for bit rates

of 155Mbps. (and all higher bit rates).

The bias generator also includes a bias current monitor mirror (BIAS

), whose output current is typically 1/100th

MON

of the bias current. This pin can be connected directly through a resistor to ground. If this function is not needed

this pin can be left open.

3.3.3

Data Inputs

Both CML and PECL inputs signals can be AC coupled to the M02061. These inputs are internally biased to

approximately V - 1.3V. In most applications the data inputs are AC coupled with controlled impedance pcb

CC3

traces which will need to be terminated externally with a 100Ω or 150Ω resistor between the + and - inputs.

PECL and CML signals may be DC coupled to the M02061 data inputs when both the M02061 and the source of

the input signals are operating from 3.3V supplies. If the M02061 is operating from a 5V supply, PECL and CML

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Functional Description

signals may be DC coupled as long as the source of the input signals is operating at a 3.3V supply and the signals

are referenced to VCC3 at the M02061.

3.3.4

Pulse Width Adjust

The data output buffer incorporates pulse-width adjustment control to compensate for laser pulse width distortion.

A potentiometer can be connected between the PWA input and GND for adjustment (programming resistance

should be between 1kΩ and 20kΩ). By adjusting the potentiometer, the pulse-width can be adjusted over a range

of approximately ±40 ps. Pulse width control can be disabled by connecting PWA to V

, resulting in roughly a

CC3

50% crossing point at the output and reducing supply current by approximately 1.5mA.

3.3.5

Modulation Control

There are programmable control lines for controlling the modulation current and its temperature compensation.

These inputs can be programmed simply with a resistor to ground.

The modulation current amplitude is controlled by the MOD

input pin. The modulation current is temperature

SET

compensated by the TC

inputs. The temperature compensation is independent of the setting.

SLOPE

If the temperature compensation at TCSLOPE is disabled, the modulation output current is simply:

IOUT = 100 x (1.3V / R

)

MODSET

Where R

is the resistance from pin MOD

to ground.

MODSET

SET

Figure 3-5 is the most accurate method for selecting RTCslope.

However, you can also select R

using the following relationship:

TCSLOPE

-1.5

R_TCSLOPE= 19.5*(TC) , where TC is the desired slope of the modulation current from 25°C to 85°C in%/°C and

R_TCSLOPEis in kΩ. If no temperature compensation is desired, leave R_TCSLOPEopen.

In any case, R_TCSLOPEwill have negligible effect at M02061 case temperatures below 10°C.

For example:

Given a laser with a desired modulation current at low temperatures of 30mA and a temperature coefficient of -

0.5%/°C at high temperatures (which will require a laser driver temperature coefficient of +0.5%).

Choose R_MODSET= 100 x (1.3V / 30mA) = 4.3kΩ

-1.5

Choose R_TCSLOPE=19.5*(0.5)

kΩ = 56kΩ.

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Functional Description

Figure 3-5. TC Slope Compensation Behavior

RTCslope:

60.00

50.00

40.00

30.00

20.00

10.00

0.00

22k

27k

33k

39k

47k

51k

62k

75k

82k

100k

120k

150k

220k

390k

750k

open

-40

-20

0

20

40

60

80

100

-10.00

-20.00

-30.00

Ambient Temperature in degrees C

3.3.6

Modulator Output

The output stage is designed to drive a 25Ω output load over a wide range of currents and circuit architectures. The

laser may be AC, DC, or Differentially coupled depending on the supply voltage.

Table 3-2.

Modulation Current Maximums

Max

Max Bias Current

Modulation Current

V =5V, Laser DC coupled

80

60

CC

(1)

V =5V, Laser AC coupled

80

CC

(2)

V =3.3V, Laser DC coupled

100

CC

V =3.3V, Laser AC coupled

100

CC

When differentially coupling, the maximum modulation and bias current is determined by either the AC or DC coupling of the OUT+ or OUT- output,

whichever has the minimum rating.

1. When AC coupling the output should never be allowed to swing above the absolute voltage rating of the part, which is 6V.

2. When V =3.3V, the OUT+ and OUT- should not be driven below 1.6V. In most 3.3V applications, this will make DC coupling impractical.

CC

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Functional Description

When DC coupled, OUT+ should be connected through a series resistor to the laser such that the total impedance

seen at the output is 25 ohms. This will result in the optimum pulse response while allowing the maximum

modulation current (see Figure 4-2).

The output can also be AC coupled to the laser. This is the required operating mode when using a 3.3V supply

(unless the laser has a small forward voltage and OUT+ will not go below 1.6V). When AC coupled the dynamic

resistance seen by OUT+ should still be 25 ohms. In addition to a resistor in series with the laser, a capacitor is

added in series and a ferrite is used to pull up the collector at OUT+ to V

.

CC

When the laser is AC coupled, the OUT- pin is usually tied to the laser anode through an AC coupled series resistor

which matches the impedance seen by the OUT+ pad (see Figure 4-1).

The output stage also has a separate current path to GND labelled GND . This isolates the output switching

0

currents from the rest of the system.

Figure 3-6. Modulator Output

*

0.75 nH

OUT-

0.4pF

*

OUT+

For V_CC=5V, OUT+ and OUT-

should not be driven below 1.15V

For V_CC= 3.3V, OUT+ and OUT-

should not be driven below 1.6V.

GND

A

(optional

external

inductance)

* Denotes bond

wire internal to

MLF package

3.3.7

Fail Output

The M02061 has a FAIL alarm output which is compatible with the TX_FAULT signalling requirements of common

pluggable module standards.

The ESD protection on this pin provides a true open collector output that can withstand significant variation in V

CC

when signalling between circuit boards. Also, if the M02061 loses power the pull-up will signal a fail condition. In a

simple static protection scheme used by other ICs the protection diodes would clamp the FAIL signal to ground

when the chip loses power.

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Functional Description

3.3.8

TX Disable and Disable Delay Control

The DIS pin is used to disable the transmit signal (both the modulation and bias current are disabled when DIS =

high).

The DIS input is compatible with TTL levels regardless of whether VCC = 5V or VCC = 3.3V. The external 4.7kΩ

and 10kΩ pull-up resistor required by most interface standards is not needed because this pin has an internal 7kΩ

resistor to V

.

CC

The DISDLY pin is used in conjunction with the DIS pin to control bias current enable time. In normal operation the

DISDLY pin should be connected to ground. In this case, each time DIS transitions from high to low the bias current

will be enabled by the “slow-start” circuitry (enable time of less than 1 ms with a C

= 2.2 nF).

APC

For burst mode operation a capacitor C is added to the DISDLY pin, the slow-start circuitry is disabled for

6

approximately T = 3 * 10 (sec/F) * C (F) following the DIS high transition (see figure 8). If the part is enabled (DIS

transitions low) during this time the bias and modulation current will quickly return to within 90% of their final value

(in less than 500ns). If DIS transitions low after the DISDLY time the slow-start circuitry will engage and the bias

current will not return to its final value for approximately 1ms (depending on the C

capacitor value).

APC

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Functional Description

Figure 3-7. DIS and DISDLY Timing

EPON Burst Mode Operation

DIS

DISDLY

IBIAS_OUT

OUT+

t_on_BM< 500ns for I_MOD> 10mA

t_off_BM< 500ns

Normal Operation, (slow-start whenever part enabled)

DIS

DISDLY

IBIAS_OUT

OUT+

t_on< 1ms, depending on C

APC

t_off< 10μs

3.3.9

TX Disable Control

The DIS pin is used to disable the transmit signal (both the modulation and bias current are disabled when DIS =

high).

The DIS input is compatible with TTL levels regardless of whether VCC = 5V or VCC = 3.3V. The external 4.7kΩ

and 10kΩ pull-up resistor required by most interface standards is not needed because this pin has an internal 7kΩ

resistor to V

.

CC

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Functional Description

3.3.10

Monitor Outputs

1

To facilitate complying with laser safety and DDMI requirements, output monitors are provided for transmit power

(TxPwr ) bias (BIAS ) and modulation current (MOD ).

MON

These outputs will source current proportional to the emitted optical power (TxPwr

) the bias current (BIAS

)

MON

and modulation current (MOD

). These pins should be terminated with a resistor to ground that sets the desired

MON

full-scale voltage (not to exceed V

-1V). Using a monitor polarity selection (MON

) these monitors can be set

CC3

POL

to sink current instead of source current. They will then need to be terminated with a resistor to V

induced voltage should not exceed 2.5V.

and the

CC3

If the outputs of these monitors are not needed, MON

, TxPwr

, BIAS

, and MOD

can all be left

MON

POL

MON

floating and the chip current consumption will be reduced by the value of the monitor currents.

3.4

Laser Eye Safety

Using this laser driver in the manner described herein does not ensure that the resulting laser transmitter complies

with established standards such as IEC 825. Users must take the necessary precautions to ensure that eye safety

and other applicable standards are met. Note that determining and implementing the level of fault tolerance

required by the applications that this part is going into is the responsibility of the transmitter designer and

manufacturer since the application of this device cannot be controlled by Mindspeed.

3.4.1

Safety Circuitry

On the M02061-12 with DISDLY on pin 8, SCB is internally bonded to ground so SCB is always in a logic low state.

When SCB is high the OUTP, BIASout and SVCC outputs will not be disabled when FAIL asserts (FAIL goes high).

The outputs are only disabled by making DIS high.

The FAIL output will also ignore much of the safety sensing circuitry when SCB is high. However, it will monitor the

state of the window comparators at pin APC . The bias current is controlled to nominally maintain the voltage at

SET

APC

to 1.3V. The threshold levels at the window comparators around APC

are specified by the parameters

SET

V

and V as shown in the table below. This provides the same level of eye safety protection as our previous

BH

BL

generation of laser drivers. The current sourced out of pin APC

is equal to the current into pin I

sourced from

SET

the laser monitor photo diode. If the laser is emitting excess power this will be reflected in the I

current and the

voltage at APC

will go high and the FAIL pin will assert. If I

is not connected to the laser monitor photo diode

SET

then the voltage at APC

will fall and FAIL will assert.

SET

When SCB is low, safety circuitry in the M02061 will disable the modulation and bias current and assert the FAIL

output immediately upon detecting a fault condition. In addition, the supply voltage that sources the laser (SV or

CC

an external switch controlled by SHDWN

through the laser.

) will immediately go open circuit and prevent any current from passing

OUT

Fault conditions checked by the M02061 include shorts to ground or V of all pins which can increase the laser

CC

modulation or bias current.

For an initialization sequence to be successful, all the fault detection monitors must signal that the chip is “healthy”.

When DIS goes low, pins are checked for shorts to ground or V and a FAIL condition is latched if there is a fault.

CC

If the state of the pins is OK, a one-shot at the reset pin begins a countdown which will latch a FAIL condition if the

bias current has not stabilized to an acceptable level during the one-shot time. The one-shot can be extended with

an external capacitor connected from the RESET pin to ground.

1

The one-shot width is approximately:

1.The one-shot is actually comprised of an oscillator and 10-bit counter.

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T

= 3 ms + (0.3 ms/pF) x (external capacitance).

ONE-SHOT

Figure 3-8. Safety Circuit Block Diagram, for SCB Pin Low

DIS

If chip is ‘healthy’, then Enable the

outputs and Start 3msec Reset

Pulse(one-shot)

AND

OUTPUT_ENABLE

Latch for

CrudeFaults

VccOK Detection:

SRlatch

Reset

:

AND

Q

5v Mode:

Vcc Pin

Set

_

5v Hi/Lo Limits

FAILout

(open-collector)

AND

Vcc3 Pin

Latch for

Bias_OK

3.3v Hi/Lo Limits

ONE-SHOT:

VCC_OK

Start

OR

SRlatch

Reset

:

PULSE

3.3v Mode:

t=0

3ms + Tcap

Q

Vcc Pin

RESET

NOTE: Pulse stays high

if Reset pin is GNDed.

5v Hi/Lo Limits

Set

_

‘1’

AND

optional cap for longer T_init

Vcc3 Pin

3.3v Hi/Lo Limits

CrudeFaults Detection:

BiasOK Detection:

OutP

> 300mV

Window Compare:

Capc

MODset

HI Limit

CrudeFaults_OK

IBout

> 300mV

MPCset

OR

BIAS_OK

LOW Limit

3.5

Fault Conditions when SCB is Low

This section describes the M02061 operating modes during fault conditions. Over voltage, under voltage,

pins shorted to V_CCand pins shorted to ground are included in the fault table.

1 2

Table 3-3.

Circuit Response to Single-point Fault Conditions, when SCB is Low

(1 of 2)

Circuit Response to Over-voltage Condition

or Short to V

Circuit Response to Under-Voltage Condition

or Short to Ground

Pin Name

CC

V

Bias and modulation outputs are disabled once V rises

Bias and modulation outputs are disabled once V drops below

CC

above the supply detection (high voltage) threshold

the supply detection (low voltage) threshold

DIN+, DIN-

The APC loop will attempt to compensate for the change in

output power. If the APC loop can not maintain the set average output power. If the APC loop can not maintain the set average

(1, 2)

power, a fault state occurs.

VCC3

Does not affect laser power.

SEL

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Functional Description

1 2

Table 3-3.

Pin Name

DIS

Circuit Response to Single-point Fault Conditions, when SCB is Low

(2 of 2)

Circuit Response to Over-voltage Condition

or Short to V

Circuit Response to Under-Voltage Condition

or Short to Ground

CC

Bias and modulation outputs are disabled.

3.3V operation - SV is opened.

Does not affect laser power (normal condition for circuit

operation).

CC

5V operation - SHDWN

goes high.

OUT

FAIL

Does not affect laser power.

RESET

MOD

MON

BIAS

MON

TxPWR

MON

(1)

APC

A fault state occurs.

SET

(1)

I

A fault state occurs.

(1)

IBIAS

OUT

The laser will be turned off, then a fault state occurs.

A fault state occurs.

OUT

(1)

Laser modulation is prevented; the APC loop will increase the A fault state occurs.

bias current to compensate for the drop in laser power if it is

P

DC coupled. If the set output power can not be obtained, a

(1, 2)

fault state occurs.

OUT

Does not affect laser power.

N

(1)

SV

Does not affect laser power.

Laser bias current will be shut off and a fault state occurs.

CC

(1)

C

Laser bias current will be shut off, then a fault state occurs.

A fault state occurs.

APC

V

Bias and modulation outputs are disabled once V rises

Bias and modulation outputs are disabled once V drops

CC3

above the supply detection (high voltage) threshold

below the supply detection (low voltage) threshold

PWA

SHDWN

Does not affect laser power.

Does not affect laser power

Does not affect laser power. if this pin is used to control an

external switch, laser current is disabled and fault state

Does not affect laser power.

OUT

(1)

occurs.

(1)

MOD

The APC loop will attempt to compensate for the change in

A fault state occurs.

SET

output power. If the APC loop can not maintain the set average

(1, 2)

power, a fault state occurs.

TC

Does not affect laser power.

May affect laser power. If this is the case, the APC loop will

attempt to compensate for the change in output power. If the

APC loop can not maintain the set average power, a fault state

SLOPE

(1, 2)

occurs.

SCB

Does not affect laser power.

DISDLY

NOTES:

1. A fault state will assert the FAIL output, disable bias and modulation outputs and will either open the switch at SV (3.3V operation) or

CC

SHDWN

will go high (5V operation).

OUT

2. Does not affect laser power when the output is AC coupled to the laser.

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4.0 Applications Information

4.1

General

•

SFP and SFF Modules

1G/2G/4G Fibre Channel modules

Short reach and Metro SONET/SDH

Figure 4-1 and Figure 4-2 illustrate typical applications for 3.3/AC coupled and 5V/DC coupled laser.

Figure 4-1. Application Diagram, VCC = 3.3V Laser AC Coupled Example

V_CC

V_CC3

V_CC

V

CC

SV

CC

Internal Power Bus

Internal

3.3V reg.

OUT-

D

+

IN

Input

Buffer

Output

Buffer

Laser

Driver

OUT+

D - FF

D

IN

-

GND

0

V_CC

100k

V_CC3-1.3V

IBIAS

OUT

IPIN

Input

Buffer

Safety

Circuitry with

Latched Fault

TX

Disable

Modulation

Control

Automatic Power Control

(laser bias current)

V_CC3

V_CC

(M02061-12

only)

(M02061-21

only)

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Applications Information

Figure 4-2. Application Diagram, VCC = 5V Laser DC Coupled Example

V

CC

V_CC=5V

V_CC3

SPST switch

SV

CC

Internal Power Bus

Internal

3.3V reg.

OUT-

D

IN

+

Input

Buffer

Output

Buffer

Laser

Driver

OUT+

D - FF

D

-

IN

GND

0

V_CC3-1.3V

IBIAS

OUT

IPIN

Input

Buffer

Safety

Circuitry with

Latched Fault

TX

Disable

Modulation

Control

Automatic Power Control

(laser bias current)

V_CC3

V_CC

(M02061-12

only)

(M02061-21

only)

4.2

Video Operation

The M02061 can be used to transmit digital video optical data even in the presence of the pathological signal. This

is done by fully DC coupling the signal from the input to the laser output.In most data communications applications,

AC coupling occurs at 3 points in a laser driver schematic: the data inputs, the APC control, and coupling the

modulation current to the laser. In the M02061 DC coupling can be used at all 3 of these points.The data inputs can

be DC coupled using PECL or CML levels (see Section 3.3.3, “Data Inputs”). LVDS signals can be DC coupled with

level shifting.The APC of the bias current is controlled by feedback from the monitor photo diode in the laser

package in most communications applications. In video applications this monitor photo diode should not be used if

the pathological pattern may occur. Instead, the APC should be controlled in an “open loop” configuration. (Open

loop simply means a monitor photo diode is not used). In the open loop configuration the APC is controlled by a

resistor or a thermistor network or a look-up table. This removes AC time constants from the bias current. In

Figure 4-3 the BIASmon pin is connected to the APCset pin. In this case the bias current is IBIAS = 100 x (1.3V /

RAPCset). The modulation current output OUT+ can be DC coupled to the laser as shown in Figure 4-3. There are

no AC time constants in the modulation current amplitude in this configuration.

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Applications Information

Figure 4-3. Video Application Block Diagram

V

CC

V_CC=5V

V_CC3

SPST switch

Internal Power Bus

SV

CC

Internal

3.3V reg.

OUT-

D

+

IN

Input

Buffer

Output

Buffer

Laser

Driver

OUT+

D - FF

D

-

IN

GND

0

V_CC3-1.3V

IBIAS

OUT

IPIN

Input

Buffer

Safety

Circuitry with

Latched Fault

TX

Disable

Modulation

Control

Automatic Power Control

(laser bias current)

V_CC3

V_CC

(M02061-12

only)

(M02061-21

only)

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5.0 Package Specification

Figure 5-1. QFN24 Package Information

Note: View is for a 20 pin package. All dimensions in the

tables apply for the 24 pin package

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www.mindspeed.com

General Information:

Telephone: (949) 579-3000

Headquarters - Newport Beach

4000 MacArthur Blvd., East Tower

Newport Beach, CA 92660

®

Information in this document is provided in connection with Mindspeed Technologies ("Mindspeed ") products.

These materials are provided by Mindspeed as a service to its customers and may be used for informational

purposes only. Except as provided in Mindspeed’s Terms and Conditions of Sale for such products or in any

separate agreement related to this document, Mindspeed assumes no liability whatsoever. Mindspeed assumes

no responsibility for errors or omissions in these materials. Mindspeed may make changes to specifications and

product descriptions at any time, without notice. Mindspeed makes no commitment to update the information and

shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to its

specifications and product descriptions. No license, express or implied, by estoppel or otherwise, to any

intellectual property rights is granted by this document.

THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR

IMPLIED, RELATING TO SALE AND/OR USE OF MINDSPEED PRODUCTS INCLUDING LIABILITY OR

WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, CONSEQUENTIAL OR INCIDENTAL

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fully indemnify Mindspeed for any damages resulting from such improper use or sale.

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型号：	M02061
厂家：	TE CONNECTIVITY
描述：	3.3 or 5 Volt Laser Driver
文件：	总37页 (文件大小：600K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

M02061 [TE]

相关型号：

M02061-12

M02061-21

M02061-EVM

M02061G-12

M02061G-21

M02061_17

M02066

M02066-21

M02066-51

M02066-82

M02066-EVME

M02066-T-EVM