M02097G-11 [TE]
3.3/5V LED Driver / Limiting Amplifier for Operation to 500 Mbps;
| 型号： | M02097G-11 |
| 厂家： | 
TE CONNECTIVITY |
| 描述： | 3.3/5V LED Driver / Limiting Amplifier for Operation to 500 Mbps |
| 文件： | 总21页 (文件大小：671K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Preliminary Information
This document contains information on a new product. The parametric information, although not
fully characterized, is the result of testing initial devices.
M02097-11/-21
3.3/5V LED Driver / Limiting Amplifier
for Operation to 500 Mbps
The M02097 is an integrated LED driver and limiting amplifier for applications to 500 Mbps. The LED driver
modulation output can be AC or DC coupled to an LED. The device can operate from a 3.3V or 5V supply.
The M02097 includes monitors for bias and modulation current. Integrated safety circuitry provides latched bias
and modulation current shutdown if a fault condition is detected and provides an internal V switch.
CC
The limiting amplifier also includes a programmable signal-level detector, allowing the user to set thresholds at
which the logic outputs are enabled. The M02097-11 features a PECL LOS-ST output while the M02097-21
features a CMOS (external pull-up required) LOS-ST output. PECL outputs are available on the limiting amplifier.
Configuration logic provides flexibility in setting data path polarity, safety logic configuration, and LOS behavior.
Applications
Features (con’t)
• 155Mbps LAN ATM Transceivers
• ESCON Receivers
• Fast Ethernet/FDDI
• Temperature compensation for modulation current
• Pre-bias adjustment to improve LED edge speed
• SFP compliant safety circuitry (configurable)
• Multimode LED Transmitters
• SFP Transceivers
• 6mV input limiting amp sensitivity at 500 Mbps.
• PECL limiting amplifier outputs
• IEEE 1394 S100, S200 and S400 Transceivers
• Limiting amplifier includes integrated DC offset cancellation circuit
• Polarity Control for both the driver and limiting amplifier data paths
Features
• Operates with 3.3V or 5V supply with an internal auto-sensing
regulator that enables with 5V supplies and is bypassed with 3.3V
supplies
• Powers 3.3V ROSAs from its Receiver Regulator output enabling true
3.3/5V designs using all 3.3V Mindspeed TIAs
• High speed operation; suitable for applications to 500 Mbps. 200 ps
typical rise/fall time into 5Ω.
• Programmable modulation current to 120 mA
• Integrated power supply switch for redundant shutdown under a
fault condition
M02097 Block Diagram
V 3R
CC
STSET
V R
CC
Threshold
Setting
Circuit
Regulator
with Bypass
RxOUTp
RxOUTm
RxINp
2kΩ
Output
Buffer
Limiting
Amplifier
Vttr
2kΩ
RxINm
Rx_Polarity
PECL
LOS-ST
Offset Cancel
Iref
PECL (-11)
Level
Detect
Biasing
LOS
CMOS/TTL
(-21)
Comparator
LOS-to-JAM
RSSI
LOS-ST_sel
DCR_Disable
To Safety
Logic
V T
CC
3.3V Regulator
with Bypass
V 3T
CC
TC
START
To Safety
Logic
Modulation
Control
SV
CC
TC
SLOPE
MODSET
OUT-
D
+
-
IN
4kΩ
4kΩ
Output
Buffer
Input
Buffer
Laser
Driver
OUT+
Vttx
D
GND
0
IN
Tx_Polarity
Rx_Polarity
CONFIG_1
CONFIG_2
CONFIG_3
CONFIG_4
V
V
CC3
CC
Tx_Polarity
Configuration
Logic
DCR_Disable
PB
OUT
SCB
LOS-to-JAM
Safety
LED Pre-Bias Control
Circuitry with
Latched Fault
TX
Disable
LOS-ST_sel
GND
RESET
®
02097-DSH-001-C
Mindspeed Technologies
November 2006
Preliiminary Information/Mindspeed Proprietary and Confidential
Ordering Information
Part Number
Package
Operating Temperature
M02097G-11*
M02097G-21*
QFN32
QFN32
–40°C to 95°C
–40°C to 95°C
* The letter “G” designator after the part number indicates that the device is RoHS-compliant. Refer to www.mindspeed.com for additional
information.
Revision History
ASIC
Revision
Revision
Level
Date
Description
C
B
A
Preliminary
Advance
November 2006
August 2006
June 2006
-11/-21
-11/-21
NA
Reflect current device pinout.
Update several specifications based on initial device evaluation.
Initial Release.
Advance
M02097 622 Mbps LED Driver Eye Diagram
M02097 Pin Configuration
32
31
30
29
28
27
26
25
RxOUTm
RxOUTp
V
3R
1
CC
24
ST
SET
2
3
23
22
V R
CC
C
PB
V
T
CC
V
3T
4
5
CC
21
20
GND
TC
SV
CC
SLOPE
TC
START
OUTN
OUTP
GNDO
19
18
6
DINp
7
8
DINm
17
9
12
13
14
15
16
10
11
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1.0 Product Specification
1.1
Absolute Maximum Ratings
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.
Table 1-1.
Symbol
Absolute Maximum Ratings
Parameter
Rating
Units
V
Power supply voltage
-0.4 to +6.5
-0.4 to +4.0
-40 to +95
-65 to +150
20
V
V
CC
V
3
3.3V power supply voltage (when V 3 is connected to V
)
CC
CC
CC
T
Ambient operating temperature
Storage temperature
°C
°C
mA
mA
A
T
STG
IPB
Maximum pre-bias output current at PB
Maximum modulation current
OUT_MAX
MOD_MAX
OUT
I
140
1.2
Recommended Operating Conditions
Table 1-2.
Recommended Operating Conditions
Parameter
Rating
Units
Power supply: (V -GND) (apply no potential to V 3) or
+5V 7.5% or
+3.3V 7.5%
V
CC
CC
(V 3-GND) (connect V to same potential as V 3)
CC
CC
CC
Junction temperature
-40 to +125
-40 to +95
°C
°C
Operating ambient
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Product Specification
1.3
DC Characteristics
1.3.1
DC Electrical Characteristics - LED Driver
V
= 3.05 to 3.55V or 4.7 to 5.5V, T = -40°C to +95°C, unless otherwise noted.
CC
A
Typical values are V = 3.3V, IPB
= 4mA, I
= 50mA.
CC
OUT
MOD
Table 1-3.
DC Electrical Characteristics - LED Driver
Symbol
Parameter
Conditions
Minimum Typical Maximum Units
(1)
I
V
T supply current
Using external 3.3V supply V = 3.3V
–
–
34
43
–
mA
CC
CC
CC
Additional current when operating from 5V
supply
1.5
V
V
3THL 3.3V supply detection (low
2.6
3.65
4.3
2.8
3.8
3.0
4.1
V
V
V
V
CC
(3)
voltage) threshold
V
3HH 3.3V supply detection (high
CC
(3)
voltage) threshold
5THL 5V supply detection (low
voltage) threshold
4.45
6.0
4.65
6.2
CC
V
5THH 5V supply detection (high
voltage) threshold
5.6
CC
V
Modulation current ref.
Voltage reference for MOD
1.1
1.1
1.25
1.25
1.4
1.4
V
V
MODSET
SET
V
Pre-bias current setting output
voltage reference
Voltage at PB
SET
PBSET
V
Low fault voltage detection
Fault condition occurs when voltage drops
below this level
–
100
1.6
200
1.8
mV
V
FAULTL
threshold (IB , OUTP, C
,
OUT
PB
MOD , PB
)
SET
SET
V
Self-biased voltage for PB
and OUTP
During disable condition
0.5
SELFL
OUT
I
Pre-bias current adjust range
At PB . V
> 0.7V
1
–
–
–
10
mA
PRE-BIAS
OUT PBOUT
I
Pre-bias current with output
disabled
DIS = high
= V
150
µA
PBIAS(OFF)
V
3
CC
PBOUT
Ratio of pre-bias output current = I
/ I
–
2.0
–
60
–
–
A/A
V
PRE-BIAS PBSET
to PB
current
SET
VIH_DIS TTL/CMOS input high voltage
(DIS)
5.5
0.8
–
VIL_DIS TTL/CMOS input low voltage
(DIS)
–
V
VIH_CFG Configuration logic input high
V
3T-0.5
–
–
V
CC
(4)
voltage (Config1 - 4)
VIL_CFG Configuration logic input low
–
0.5
V
(4)
voltage (Config1 - 4)
VOH_FAIL Logic output high voltage (FAIL) With external 10 kΩ pull-up to V
V
- 0.6
CC
–
–
6
–
0.4
–
V
V
CC
VOL_FAIL Logic output low voltage (FAIL)
Differential input resistance
I
= 0.8 mA
–
OL
R
Transmitter Data inputs
–
kΩ
IN
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Table 1-3.
DC Electrical Characteristics - LED Driver
Parameter Conditions
Symbol
Minimum Typical Maximum Units
V
Self-biased common mode input Data inputs floating
voltage
–
V
3 - 1.3
–
V
CMSELF
CC
V
Common-mode input
compliance voltage
Transmitter Data inputs
V
3 - 1.5
–
–
V
3
V
INCM
CC
CC
- V
/4
IN(Diff)
V
Differential input voltage
= 2*(DINp
– DINp )
LOW
300
2400
mV
IN(Diff)
HIGH
NOTES:
1. Excludes pre-bias and modulation currents delivered to the LED. Maximum supply current based on I
= 90 mA, IPB
= 10 mA.
MOD
OUT
2. Pre-bias and modulation currents add directly to power supply current in 5V applications; additional supply current noted excludes these
currents.
3.
V 3 supply okay circuitry monitors internally regulated voltage when only the +5V supply is used (V = 5V).
CC CC
4. Input is 3.3V tolerant logic.
1.3.2
DC Electrical Characteristics - Limiting Amplifier
V
R = 3.05 to 3.55V or 4.7 to 5.5V, T = -40°C to +95°C, unless otherwise noted.
CC
A
Typical values are V = 3.3V, 25°C.
CC
Table 1-4.
DC Electrical Characteristics - Limiting Amplifier
Parameter Conditions
Symbol
Minimum Typical Maximum Units
I
V
R supply current
CC
Includes PECL load
–
54
65
mA
CC
Additional current when operating
from 5V supply
–
1.5
–
(1)
(1)
V
PECL
PECL Output Low Voltage
(RxOUTm, RxOUTp)
Single ended; 50Ω load to V - 2V
V
V
OUTL
CC
V
V
- 1.86
V
V
- 1.71
V
V
- 1.62
CC
CC
CC
CC
CC
CC
V
PECL
PECL Output High Voltage
(RxOUTm, RxOUTp)
Single ended; 50Ω load to V - 2V
OUTH
CC
- 1.06
–
- 0.95
- 0.88
–
R _DIFF
Differential Input Resistance
4
–
kΩ
IN
(1)
(2)
V
LOS
LOS Output High Voltage
Open collector, 4.7 - 10 kΩ pull up to
2.4
V
CC
V
OUTL
PECL
V
CC
(1)
(2)
V
LOS
LOS Output Low Voltage
I
= 0.8 mA
–
–
0.4
V
V
V
OUTH
PECL
OL
(1, 2, 3)
(1, 2, 3)
V
LOS
LOS
LOS-ST Output Low Voltage
LOS-ST Output High Voltage
Single ended; 50Ω load to V - 2V
V
- 1.9
V
- 1.78
V
V
- 1.66
- 0.95
OUTL
CMOS
CC
CC
CC
CC
CC
V
Single ended; 50Ω load to V - 2V
V
- 1.13
V
-
OUTH
CMOS
CC
CC
CC
1.042
NOTES:
1. PECL level requirements apply from 0°C to 95°C.
2. M02091-11 has PECL LOS-ST output, M02097-21 has CMOS LOS-ST output.
3. When LOS-ST is terminated with a 510Ω resistor to ground, PECL output high and low levels are approximately the same as for V
PECL and
OUTH
V
PECL.
OUTL
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Product Specification
1.4
AC Characteristics
1.4.1
AC Electrical Characteristics - LED Driver
V
T = 3.05 to 3.55V or 4.7 to 5.5V, T = -40°C to +95°C, unless otherwise noted.
CC
A
Typical values are V = 3.3V, IPB
= 4mA, I
= 50mA.
CC
OUT
MOD
Table 1-5.
AC Electrical Characteristics - LED Driver
Parameter Conditions
Symbol
Minimum Typical Maximum Units
I
Modulation current adjust range To meet AC specifications
30
–
–
–
120
150
mA
PP
MOD
I
Modulation current with output
disabled
DIS = high
µA
MOD(OFF)
Ratio of modulation current to
–
0
140
–
–
A/A
ppm/°C
°C
MOD
current
SET
Programmable range for
modulation current temperature Adjustable using TC
coefficient
4
I
10
MOD-TC
SLOPE
Programmable temperature at
which modulation current TC
compensation enables
(2)
T
Based on value set for TC
-40
–
95
TCSTRT
START
20% to 80%. Measured using alternating 1111-
0000 pattern at 500 Mbps; 5Ω load with 12pF/
35Ω between OUTP and OUTN
t / t
Modulation output rise / fall
times
–
–
200
10
500
–
ps
%
R
F
OS
Overshoot of modulation output Into 5Ω load with 12pF/35Ω between OUTP and
OUTN
RJ
DJ
Random jitter
–
–
0.8
30
–
ps
RMS
Modulation output deterministic into 5Ω load (includes pulse width distortion)
jitter
60
ps
PP
23
2
- 1 PRBS at 500 Mbps
NOTES:
1. Minimum voltage at OUTP > 0.7 V; LED forward voltage and total series resistance must be considered if output is DC coupled to LED.
2. Default if TC is floating.
START
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Product Specification
1.4.2
AC Electrical Characteristics - Limiting Amplifier
V
R = 3.05 to 3.55V or 4.7 to 5.5V, T = -40°C to +95°C, unless otherwise noted.
CC
A
Table 1-6.
AC Electrical Characteristics - Limiting Amplifier
Symbol
Parameter
Conditions
Minimum Typical Maximum Units
-12
V
Differential Input Sensitivity
BER < 10 at 1.25 Gbps with K28.5 pattern
2
1200
600
–
–
–
–
–
–
4
–
–
–
mV
IN(MIN)
-12
BER < 10 , differential input
V
Input Overload
mV
I(MAX)
-12
BER < 10 , single-ended input
–
V
RMS Input Referred Noise
LOS Programmable Range
Signal Detect Hysteresis
285
55
6
µV
RMS
N
V
Differential inputs, 6.0 kΩ ≤ R
≤ 8.4 kΩ
5
mV
dB
LOS
STSET
HYS
(electrical); signal detect level set to 20 mV
2
PP
RSSIpp Peak-to-peak received signal
strength indicator range
4
100
mV
BW
Small-Signal -3dB Low
Frequency Cutoff.
Excluding AC coupling capacitors
K28.5 pattern at 500 Mbps
–
4
–
kHz
LF
DJ
RJ
Deterministic Jitter
Random Jitter
–
–
–
–
3
–
50
–
ps
10 mV input
ps
RMS
PP
t / t
Data Output Rise and Fall Times 20% to 80%; outputs terminated into 50Ω;
10mV input
250
ps
µs
µs
r
f
PP
T
Time from LOS state until LOS
output is asserted
LOS assert time after 1 V input signal is turned
2.3
2.3
–
–
80
80
LOS_ON
PP
off; signal detect level set to 10 mV
T
Time from non-LOS state until
LOS is deasserted
LOS deassert time after input crosses signal
detect level; signal detect set to 10 mV with
LOS_OFF
applied input signal of 20 mV
PP
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Product Specification
1.5
Safety Logic Timing
V
= 3.05 to 3.55V or 4.7 to 5.5V, T = -40°C to +95°C, unless otherwise noted.
CC
A
Typical values are V = 3.3V, IPB
= 4mA, I
= 50mA.
CC
OUT
MOD
Table 1-7.
Symbol
t_off
Safety Logic Timing
Parameter
Conditions
Minimum Typical Maximum Units
DIS assert time
Rising edge of DIS to fall of output signal below
–
–
–
1
0.4
4
10
µs
ms
ms
(1)
10% of nominal
t_on
DIS negate time
Time to initialize
Falling edge of DIS to rise of output signal above
1
(1)
90% of nominal
t_init
Includes reset of FAIL; from power on after
Supply_OK or from negation of DIS during reset
of FAIL condition
300
t_wc
t_fault
t_reset
Window comparator hold-off
time
Time during which the status of the fault detect
comparators is ignored.
2
–
–
–
3
16
–
–
100
10
–
ms
µs
µs
µs
LED fault time -- from fault
condition to assertion of FAIL
From occurrence of fault condition or when
Supply_OK is beyond specified range
DIS time to start reset
DIS pulse width required to initialize safety
circuitry or reset a latched fault
t
_
Supply okay delay time
Delay between supply_OK condition and when
outputs are enabled
900
VCC OK
NOTE:
1. With C = 47 nF.
PB
Figure 1-1. Safety Logic Simplified Block Diagram
DIS
SCB
Normal
Output _Enable
Fault_OK
V
3_OK
cc
V
cc
_OK
FAIL
3.3V_ONLY
SCB
~900 µs typical
Fault_OK
SET
CLR
S
R
Q
Q
~2V
TCSLOPE
+
-
Normal
Activate_Config_Settings
~3 ms typical
Configuration settings are not updated while TC
is
SLOPE
pulled high, but are updated when TC
is at normal level
SLOPE
* Fault_OK indicates that no fault is detected at any of the fault sense nodes
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Product Specification
Table 1-8.
Pin Name
Config1-4
Circuit Response to Single-Point Fault Conditions on Driver Pins
Circuit Response to Over-voltage Condition or Short to Circuit Response to Under-Voltage Condition or Short
VCC
to Ground
Does not affect output power (some conditions can selectively
enable/disable driver output).
Does not affect output power (some conditions can selectively
enable/disable driver output).
V
Outputs are disabled if V exceeds the V _okay (high level)
threshold. If so, FAIL will be asserted.
Outputs are disabled if V voltage is below the V _okay (low
level) threshold. If so, FAIL will be asserted.
CC
CC
CC
CC
CC
(1)
(1)
V
3T
Outputs are disabled if V 3 exceeds the V 3_okay (high level) Outputs are disabled if V 3 voltage is below the V 3_okay
CC
CC
CC
CC
CC
(1)
(1)
threshold. If so, FAIL will be asserted.
(low level) threshold. If so, FAIL will be asserted.
DINp, DINm
LED would remain in an optical one or zero condition.
Pre-bias current is turned off. Does not affect LED operation.
Does not affect LED operation.
LED would remain in an optical one or zero condition.
(2)
C
A fault state occurs.
PB
FAIL
DIS
Does not affect LED operation.
Bias and modulation outputs are disabled and SV is opened.
Does not affect LED operation (normal condition for circuit
operation).
CC
(2)
MOD
No modulation current.
A fault state occurs.
SET
(2)
PB
Pre-bias current is turned off. Does not affect LED power.
A fault state occurs.
SET
TC
Modulation current may increase depending on operating
Modulation current may decrease depending on operating
START
temperature and TC
setting.
temperature and TC
setting.
SLOPE
SLOPE
TC
Modulation current may decrease depending on operating
temperature and TC setting.
Modulation current may increase depending on operating
SLOPE
temperature and TC
A fault state occurs.
A fault state occurs.
setting.
START
START
(2)
PB
The LED is turned off if connected to the LED cathode.
OUT
(2)
(2)
OUTP
OUTN
GNDO
LED modulation is prevented and a fault state occurs.
Does not affect LED operation.
Does not affect LED operation.
(2)
LED modulation is prevented and a fault state may occur.
Does not affect LED operation.
Does not affect LED operation.
(2)
SV
The LED is turned off and a fault state occurs.
CC
NOTES:
1. In this case a fault state will assert the FAIL output, but it is not latched. While the fault condition remains, the bias and modulation outputs are
disabled and the switch at SV is open. No fault occurs if in Safety Circuit Bypass (SCB).
CC
2. In this case a fault state will assert and latch the FAIL output, disable bias and modulation outputs and open the switch at SV . No fault occurs
CC
if in Safety Circuit Bypass (SCB).
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Figure 1-2. M02097 Safety Logic Timing Characteristics
SLOW RAMPING3.3V Operation (DIS Low)
HOT PLUG (DIS Low)
3.3V
“OK”
Supply (1)
V
CC
3.3V
V
CC
3
t_init < 5 ms
(3 ms typ.)
Low
Low
FAIL
DIS
t_init < 5 ms
(3 ms typ.)
Low
FAIL
DIS
Low
LED
LED
Output
Output
SLOW RAMPING 5V Operation (DIS Low)
TRANSMITTER ENABLE
5V
“OK”
V
CC
Supply (1)
FAIL
3.3V
Low
t_on < 1 ms
V
3
CC
(300 µs typ.)
Low
t_init < 5 ms
(3 ms typ.)
FAIL
DIS
High
DIS
Low
Low
LED
LED
Output
Output
TRANSMITTER DISABLE
“OK”
RESPONSE TO FAULT
Fault Occurs
Fault sense
node such
Supply (1)
FAIL
Normal
Low
as PBOUT
t_off < 10 µs
High
(1 µs typ.)
Low
t_fault < 100 µs
(4 µs typ.)
FAIL
DIS
Low
Low
High
DIS
Low
LED
Output
LED
Output
1. Supply “OK” means both V and V 3 are within their defined operating windows.
CC
CC
NOTE: “LED Output” is equivalent to pre-bias current plus modulation current.
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Figure 1-3. M02097 Safety Logic Timing Characteristics (Continued)
FAULT RECOVERY BEHAVIOR
FAULT RESET ATTEMPT
Fault sense
Fault sense
node such
node such
Low
Normal
Fault Removed
as PBOUT
as PBOUT
Low
High
FAIL
10 - 20 µs
FAIL
Low
DIS
t_reset
DIS
10 µs
10 µs
(Does not turn on)
LED
Output
t_on < 1 ms
(300 µs typ.)
LED
Output
FAULT RESET ATTEMPT
Fault sense
node such
as PBOUT
Low
t_init < 5 ms
(3 ms typ.)
FAIL
DIS
10 µs
LED
Output
1. Supply “OK” means both V and V 3 are within their defined operating windows.
CC
CC
NOTE: “LED Output” is equivalent to bias current plus modulation current.
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1.6
M02097 Configuration Logic
Table 1-9.
M02097 Configuration Logic
LOS=JAM/
NO_JAM
Special
Config.
Config1
Config2
Config3
Config4
DIS/EN
LOS/ST SCB
RxPOL
TxPOL
0
0
0
0
0
0
0
M
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
1
1
0
0
1
1
0
0
0
1
1
0
0
1
1
0
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
none
none
none
none
none
none
none
none
SC1
0
0
M
M
1
0
0
M
1
0
0
0
0
0
1
0
0
1
0
0
0
M
1
1
0
0
M
0
0
M
M
M
M
M
M
M
M
M
0
0
none
none
none
none
none
none
none
none
SC2
0
0
M
0
0
M
M
1
0
M
1
0
0
0
1
0
1
0
0
M
1
1
0
M
0
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
0
none
none
none
none
none
none
none
none
SC3
0
0
M
0
0
M
M
1
0
M
1
0
0
0
1
0
1
0
0
M
1
1
0
M
0
M
M
M
M
M
M
0
none
none
none
none
none
none
0
M
0
M
M
1
M
1
0
1
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Product Specification
Table 1-9.
M02097 Configuration Logic
LOS=JAM/
NO_JAM
Special
Config.
Config1
Config2
Config3
Config4
DIS/EN
LOS/ST SCB
RxPOL
TxPOL
M
M
M
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
M
1
M
1
M
M
M
M
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
1
M
1
M
1
1
M
1
0
1
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
1
1
0
0
0
1
1
0
0
1
1
0
0
0
1
1
0
0
1
1
0
0
0
1
1
0
0
1
1
0
0
0
0
0
1
0
1
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
0
0
1
1
0
none
none
SC4
M
0
0
none
none
none
none
none
none
none
none
SC5
0
M
0
M
M
1
M
1
0
1
1
0
M
1
1
M
0
0
none
none
none
none
none
none
none
none
SC5
0
M
0
M
M
1
M
1
0
1
1
0
M
1
1
M
0
0
none
none
none
none
none
none
none
none
SC6
0
M
0
M
M
1
M
1
0
1
1
0
M
1
1
M
0
0
none
SC7
0
0
0
M
M
0
none
SC8
0
M
none
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Product Specification
Table 1-9.
M02097 Configuration Logic
LOS=JAM/
NO_JAM
Special
Config.
Config1
Config2
Config3
Config4
DIS/EN
LOS/ST SCB
RxPOL
TxPOL
1
M
1
M
M
M
1
0
M
M
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
1
1
1
1
1
1
1
0
1
0
1
1
1
0
0
0
0
1
1
1
0
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
SC9
none
SC10
none
SC5
M
1
M
1
M
1
M
1
1
1
M
0
1
none
SC3
1
M
1
0
1
M
1
0
none
SC11
none
SC12
SC13
SC14
1
M
1
1
0
M
M
1
1
M
1
M
1
1
1
M
M
M
1
M
KEY:
0, 1, M:0 = Logic low; 1 = Logic high; M = pin floating (pin goes to intermediate “mid-range” self-biased voltage
DIS/EN:0 = DIS pin acts as Tx_Disable; 1 = DIS pin becomes Tx_Enable
LOS=JAM / NO_JAM:0 = Jam outputs upon LOS; 1 = Do not jam outputs upon LOS
LOS/ST:0 = LOS-ST pin is ST (goes high with signal detect); 1 = LOS-ST pin is high with LOS
SCB:0=latched fault; 1=safety circuit bypass mode
TxPOL and RxPOL:0 = default polarity; 1 = inverted polarity
Special Config.:Refer to Special Configurations table for definition of special configuration modes
Table 1-10. M02097 Special Configurations
Special
Config. #
Special Config.
Name
Definition
SC1 - SC11
SC12
Test Modes
DCRDIS
Internal Use Only; do not use
Disables the DC restore in the limiting amplifier. Can pass DC signal through limiting amp, but offset at
limiting amplifier input passes through to outputs.
SC13-14
Test Modes
Internal Use Only; do not use
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2.0 Pin Definitions
Table 2-1.
M02097 Pad / Pin Descriptions (1 of 2)
QFN Pin
Number
Pin Name
Function
1
2
3
4
5
RxOUTm
RxOUTp
Limiting amplifier inverting data output (PECL). Output is referenced to the Rx supply input (V R).
CC
Limiting amplifier non-inverting data output (PECL). Output is referenced to the Rx supply input (V R).
CC
V
R
Power supply for limiting amplifier circuitry (3.3V or 5V).
Power supply for LED driver circuitry (3.3V or 5V).
CC
V
T
CC
TC
Modulation temperature compensation slope. A resistor to ground sets the level of temperature compensation for
the modulation current. Forcing this pin high (to 3.3V) causes the configuration logic to ignore configuration logic
settings until this pin is released to its normal level (~1.25V). Temperature compensation is disabled if this pin is
floating.
SLOPE
6
TC
A resistor to ground at this pin sets the temperature at which the modulation temperature compensation slope
becomes active. Letting this pin float results in a start temperature of ~-40°C. Grounding this pin disables
temperature compensation.
START
7
8
DINp
DINm
FAIL
DIS
Transmitter positive Data Input. Internally terminated with 4 kΩ to self-bias voltage of approximately
V
3T - 0.65V. Can be AC coupled.
CC
Transmitter negative Data Input. Internally terminated with 4 kΩ to self-bias voltage of approximately
3T - 0.65V. Can be AC coupled.
V
CC
9
Safety circuit fault indicator. Goes high when a safety logic fault is detected. The FAIL output is low when DIS is
high. Open collector; 4.7 kΩ to 10 kΩ external pull-up required. 5V compatible when using a 5V supply.
10
Disable control (TTL compatible). When high or left floating, the bias and modulation outputs are disabled. Set
low for normal operation. 7 kΩ internal pull-up to V T.
CC
11
12
13
14
15
16
17
18
MOD
Modulation Current Adjust. Connect a resistor between this pin and ground to set LED modulation current.
SET
NC
NC
No connect, leave floating. Do not connect to ground or V
No connect, leave floating. Do not connect to ground or V
.
.
CC
CC
PB
A resistor connected from this pin to ground sets the LED pre-bias current. Leave floating if pre-bias is not used.
Not connected in package.
SET
NC
PB
LED pre-bias current output. Connect to LED cathode with a 100 Ω resistor between the LED anode and cathode.
Ground for modulation output stage. Connect directly to ground or can connect to ground through an inductor.
OUT
GNDO
OUTP
Transmitter positive modulation output. Draws current when DINp is high. Referenced to the SV (transmitter
CC
regulator output) voltage.
19
20
OUTN
Transmitter negative modulation output. Draws current when DINp is low. Referenced to the SV (transmitter
regulator output) voltage.
CC
SV
Internal power supply switch for LED. Provides redundant shutdown during a disable or fault condition.
CC
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Pin Definitions
Table 2-1.
M02097 Pad / Pin Descriptions (2 of 2)
QFN Pin
Number
Pin Name
Function
21
V
3T
Internally regulated voltage for LED driver circuitry in 5V applications. Connect directly to supply to allow wider
power supply tolerance in 3.3V-only applications (internal regulator not in use). Do not connect to power supply if
CC
V
= 5V.
CC
22
C
A capacitor at this pin sets the compensation for the pre-bias control. Connect a capacitor between this pin and
3 if pre-bias control is used. Can leave floating if not using pre-bias.
PB
V
CC
23
24
ST
Loss of signal threshold setting input. Connect a resistor between this pin and V 3 to set loss of signal threshold.
SET
CC
V
3R
Internally regulated voltage for limiting amplifier circuitry in 5V applications. Connect directly to supply to allow
wider power supply tolerance in 3.3V-only applications (internal regulator not in use). Do not connect to power
CC
supply if V = 5V.
CC
25
26
RxINp
Non-inverting limiting amplifier data input. Internally terminated with 2 kΩ to self-bias voltage of approximately
V
3R - 0.5V.
CC
RxINm
Inverting limiting amplifier data input. Internally terminated with 2 kΩ to self-bias voltage of approximately
3R - 0.5V.
V
CC
27
28
29
30
31
Config1
Config2
Config3
Config4
LOS-ST
Configuration logic input. These pins select LED driver and limiting amplifier configurations and test modes. Refer
to Configuration Logic table (Table 1-9) for more information. Three level logic where nominal level is mid-range
(V 3T / 2) when floating.
CC
Limiting amplifier LOS or ST (signal detect) output (M02097-11 PECL, M02097-21 CMOS). Configuration logic
selects whether output is to be LOS or ST. 5V compatible when using a 5V supply.
32
I
Internal reference current. Must be connected to ground through a 12.4 kΩ 1% resistor.
REF
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Pin Definitions
Figure 2-1. M02097 Package Pin-out (5x5mm MLF)
32
31
30
29
28
27
26
25
RxOUTm
RxOUTp
V
3R
1
CC
24
ST
SET
2
3
23
22
V R
CC
C
PB
V
T
CC
V
3T
CC
4
5
21
20
GND
TC
SV
CC
SLOPE
TC
OUTN
OUTP
GNDO
START
19
18
6
DINp
7
8
DINm
17
9
12
13
14
15
16
10
11
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3.0 Functional Description
3.1
Overview
The M02097 device is a highly integrated combined LED driver and limiting amplifier intended for applications to
500 Mbps. The part can be operated from a single 3.3V or 5V supply.
Many features are user-adjustable, including the pre-bias current, modulation current, temperature compensation
control of modulation current, loss of signal threshold, using jam or not on the Rx path and the Rx and Tx polarity.
Safety circuitry is also included to provide a latched shut-down of LED bias and modulation current if a fault
condition occurs. An internal V switch provides redundant shutdown of the LED current under a fault condition.
CC
Figure 3-1. M02097 Block Diagram
V 3R
CC
STSET
V R
CC
Threshold
Setting
Circuit
Regulator
with Bypass
RxOUTp
RxOUTm
RxINp
2kΩ
Output
Buffer
Limiting
Amplifier
Vttr
2kΩ
RxINm
Rx_Polarity
PECL
LOS-ST
Offset Cancel
Iref
PECL (-11)
Level
Detect
Biasing
LOS
CMOS/TTL
(-21)
Comparator
LOS-to-JAM
RSSI
LOS-ST_sel
DCR_Disable
To Safety
Logic
V
T
CC
3.3V Regulator
with Bypass
V 3T
CC
TC
START
To Safety
Logic
Modulation
Control
SV
CC
TC
SLOPE
MODSET
OUT-
OUT+
D
+
-
IN
4kΩ
4kΩ
Output
Buffer
Input
Buffer
Laser
Driver
Vttx
D
GND
0
IN
Tx_Polarity
Rx_Polarity
CONFIG_1
CONFIG_2
CONFIG_3
CONFIG_4
V
V
CC3
CC
Tx_Polarity
Configuration
Logic
DCR_Disable
PB
OUT
SCB
LOS-to-JAM
Safety
LED Pre-Bias Control
Circuitry with
Latched Fault
TX
Disable
LOS-ST_sel
GND
RESET
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Functional Description
3.2
Internal Regulator
When operating from a 5V supply (V 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. When a 3.3V supply is used (V connected to 3.3V, or both V and V 3
CC
CC
CC
connected to 3.3V), internal logic configures the device for 3.3V operation and the regulator is switched to a low-
resistance mode. The device decides whether or not the internal regulator is enabled using internal sensing logic,
the sensing logic also determines whether the device safety circuitry needs to monitor for proper +5V supply
voltage.
3.3
Driver Inputs
The inputs to the data buffer are self-biased through resistors to an internal reference of approximately V - 1.3V.
CC
Both CML and PECL input signals can be AC coupled to the M02097. AC coupling is recommended when using
the internal regulator (V = 5V), though external level-shifting may be used if DC coupling is desired with 5V
CC
supply.
3.4
Driver Output Stage
The output stage incorporates feedback to maintain performance over the range of LED modulation current. The
output stage is nominally configured to drive an output load of ~5Ω with shunt RC compensation for LEDs. OUTP
should be connected directly to the LED cathode. This will result in the optimum pulse response while allowing the
maximum modulation current to be achieved when the output is DC coupled to the load. The LED driver output
stage is separately grounded from the rest of the circuitry (through GNDO) for optimum performance and control of
output characteristics.
The output can also be AC coupled to the LED. LED modulation current is controlled by adjusting current at
MOD . The modulation current can be temperature compensated by setting slope through the TC
pin and
SET
SLOPE
TC
sets the temperature at which the temperature compensation begins to operate.
START
3.5
Safety Circuitry
Comparators at PB , MOD , PB
OUTP, and C will assert the FAIL output, indicating that a fault condition
SET
SET
OUT
PB
has occurred. This condition is latched and requires DIS to be toggled or power cycling before reset occurs. SV
is opened during a fault or disable condition.
CC
By setting DIS high, the bias and modulation output currents are disabled. DIS will disable LED bias and
modulation current if left floating. DIS must be forced to a low state to enable the outputs. When safety circuit
bypass (SCB) mode is enabled, FAIL will indicate a fault condition, but the outputs will not be disabled under a fault
condition. Only the DIS pin will shutdown the outputs when in SCB mode.
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4.0 Package Specification
Figure 4-1. QFN32 Package Information
Note: View is for a 28 pin package. All dimensions in the
tables apply for the 32 pin package
3.30
3.30
3.45
3.45
3.15
3.15
0.90
0.70
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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
®
© 2006 Mindspeed Technologies , Inc. All rights reserved.
®
®
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
DAMAGES, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER
INTELLECTUAL PROPERTY RIGHT. MINDSPEED FURTHER DOES NOT WARRANT THE ACCURACY OR
COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE
MATERIALS. MINDSPEED SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS,
WHICH MAY RESULT FROM THE USE OF THESE MATERIALS.
Mindspeed products are not intended for use in medical, lifesaving or life sustaining applications. Mindspeed
customers using or selling Mindspeed products for use in such applications do so at their own risk and agree to
fully indemnify Mindspeed for any damages resulting from such improper use or sale.
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