T0800-TNQY [ATMEL]
Interface Circuit, PDSO24, SSOP-24;
| 型号： | T0800-TNQY |
| 厂家： | 
ATMEL |
| 描述： | Interface Circuit, PDSO24, SSOP-24 振荡器 驱动器 接口集成电路 射频 光电二极管 输出元件 |
| 文件： | 总14页 (文件大小：291K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Features
• Current-controlled Output Current Source with 5 Input Channels
• 2 Selectable Outputs for Grounded Laser Diodes
• Output Current per Channel up to 200 mA
• Total Output Current up to 250 mA
• Rise Time 1.0 ns/Fall Time 1.1 ns
• On-chip RF Oscillator
• Control of 2 Different Frequencies and Swings by Use of 4 External Resistors
• Oscillator Frequency Range from 200 MHz to 600 MHz
• Oscillator Swing to 100 mA
• Single 5-V Power Supply
• Common Enable/Disable Input
5-ChannelLaser
Driver with RF
Oscillator and
2 Outputs
• TTL/CMOS Control Signals
• Small SSO24 Package and QFN28 Package
Applications
• Combo Drives (DVD + CD-RW)
• DVD-RAM with CD-RW Capability
• DVD-RW with CD-RW Capability
T0800
1. Description
The T0800 is a laser diode driver for the operation of two different, grounded laser
diodes for DVD-RAM (650 nm) and CD-RW (780 nm). It includes five channels for five
different optical power levels which are controlled by a separate IC. The read channel
generates a continuous output level. The channels 2 to 5 are provided as write chan-
nels with very fast switching speeds. When a low signal is applied to the NE pins, write
current pulses are enabled. All channels are summed together and switched to one of
the two outputs IOUTA or IOUTB by the select input SELA. Each channel can contrib-
ute up to 200 mA to the total output current of up to 250 mA. A total gain of 100 is
provided between each reference current input and the selected output. Although the
reference inputs are current inputs, voltage control is possible by using external resis-
tors. An on-chip RF oscillator reduces laser mode hopping noise during read mode.
Frequency and swing can be set independently for the two selectable outputs with two
pairs of resistors. Oscillation is enabled by a high signal at the ENOSC pin. Complete
output current and oscillator switch-off is achieved by a low signal at the ENABLE
input.
Rev. 4503D–DVD–02/05
2. Pin Configuration
Figure 2-1. Pinning SSO24
IR
I2
1
2
3
4
5
6
7
8
9
24 VCC1
23 VCC2
22 IOUTA
21 IOUTA
20 GND
I3
I4
I5
RFA
RFB
NE2
NE3
19 RSA
18 RSB
17 IOUTB
16 IOUTB
15 SELA
14 ENOSC
13 VCC2
NE4 10
NE5 11
ENABLE 12
Table 2-1.
Pin Description: SSO24
Pin
1
Symbol
IR
Type
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Digital
Digital
Digital
Digital
Digital
Supply
Digital
Function
Input current, bias voltage approximately GND
Input current, bias voltage approximately GND
Input current, bias voltage approximately GND
Input current, bias voltage approximately GND
Input current, bias voltage approximately GND
External resistor to GND sets frequency of oscillator A
External resistor to GND sets frequency of oscillator B
Digital control of channel 2 (low active)
Digital control of channel 3 (low active)
Digital control of channel 4 (low active)
Digital control of channel 5 (low active)
Enables output current (high active)
2
I2
3
I3
4
I4
5
I5
6
RFA
RFB
NE2
NE3
NE4
NE5
ENABLE
VCC2
ENOSC
7
8
9
10
11
12
13
14
+5 V power supply for IOUT
Enables RF oscillator (high active)
High: selects IOUTA, RFA, RSA
Low: selects IOUTB, RFB, RSB
15
SELA
Digital
16/17
18
IOUTB
RSB
Analog
Analog
Analog
Supply
Analog
Supply
Supply
Output current source B for laser diode
External resistor to GND sets swing of oscillator B
External resistor to GND sets swing of oscillator A
Ground
19
RSA
20
GND
21/22
23
IOUTA
VCC2
VCC1
Output current source A for laser diode
+5 V power supply for IOUT
24
+5 V power supply for circuit
2
T0800
4503D–DVD–02/05
T0800
Figure 2-2. Pinning QFN28
28 27 26 25 24 23 22
I4
I5
21 IOUTA
20 IOUTA
19 GND
1
2
3
4
5
6
7
RFA
RFB
GND
NE2
NE3
18 RSA
17 RSB
16 IOUTB
15 IOUTB
8
9 10 11 12 13 14
Table 2-2.
Pin Description: QFN28
Pin
Symbol
I4
Type
Analog
Analog
Analog
Analog
Supply
Digital
Digital
Digital
Digital
Digital
Supply
Digital
Function
1
Input current, bias voltage approximately GND
Input current, bias voltage approximately GND
External resistor to GND sets frequency of oscillator A
External resistor to GND sets frequency of oscillator B
Ground
2
I5
3
RFA
4
RFB
5
GND
NE2
6
7
Digital control of channel 2 (low active)
Digital control of channel 3 (low active)
Digital control of channel 4 (low active)
Digital control of channel 5 (low active)
Enables output current (high active)
+5 V power supply IOUT
NE3
8
NE4
9
NE5
10
11, 12
13
ENABLE
VCC2
ENOSC
Enables RF oscillator (high active)
High: selects IOUTA, RFA, RSA
Low: selects IOUTB, RFB, RSB
14
SELA
Digital
15
16
IOUTB
IOUTB
RSB
RSA
GND
IOUTA
IOUTA
VCC2
VCC1
NC
Analog
Analog
Analog
Analog
Supply
Analog
Analog
Supply
Supply
–
Output current source B for laser diode
Output current source B for laser diode
External resistor to GND sets swing of oscillator B
External resistor to GND sets swing of oscillator A
Ground
17
18
19
20
Output current source A for laser diode
Output current source A for laser diode
+5 V power supply IOUT
21
22, 23
24
+5 V power supply circuit
25
Not connected
26
IR
Analog
Analog
Analog
–
Input current, bias voltage approximately GND
Input current, bias voltage approximately GND
Input current, bias voltage approximately GND
Should be connected with ground
27
I2
28
I3
Paddle
–
3
4503D–DVD–02/05
Figure 2-3. Block Diagram
I5
Channel 5
Channel 4
NE5
I4
NE4
I3
Channel 3
NE3
IOUTA
IOUTB
I2
Channel 2
NE2
IR
Read channel
RF oscillator
ENABLE
ENOSC
RFA RFB
SELA
RSA RSB
4
T0800
4503D–DVD–02/05
T0800
3. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Parameter
Symbol
VCC
Value
-0.5 to +6.0
-0.5 to +0.5
-0.5 to VCC +0.5
-0.5 to VCC -1
0.7(1) to 1(2)
150
Unit
V
Supply voltage
Input voltage at IR, I2, I3, I4, I5
Input voltage at NE2, NE3, NE4, NE5, ENOSC
Output voltage
VIN1
VIN2
VOUT
Ptot
V
V
V
Power dissipation
W
°C
°C
Junction temperature
TJ
Storage temperature range
Tstg
-65 to +125
Notes: 1. RthJA ≤115 K/W, Tamb = 70°C
2. RthJA ≤115 K/W, Tamb = 25°C
4. Thermal Resistance
Parameter
Symbol
Value(1)
Unit
115 (SSO24)
35 (QFN28)
K/W
K/W
Junction ambient
RthJA
Note:
1. Measured with multi-layer test board (JEDEC standard JESD51-7)
5. Recommended Operating Conditions
Parameter
Symbol
Value
4.5 to 5.5
< 2.5
Unit
V
Supply voltage range
Input current
VCC
IIR, II2, II3, II4, II5
mA
External resistor to GND to set oscillator
frequency
RFA, RFB
> 3
kΩ
External resistor to GND to set oscillator swing
Operating temperature range
RSA, RSB
Tamb
> 100
Ω
0 to +70
°C
5
4503D–DVD–02/05
6. Electrical Characteristics
VCC = 5 V, Tamb = 25°C, ENABLE = High, NE2 = NE3 = NE4 = NE5 = High, ENOSC = Low, unless otherwise specified
No.
1
Parameters
Test Conditions
Pin(1)
Symbol
Min.
Typ.
Max.
Unit
Type*
Power Supply
ENABLE = Low,
NE2 = NE3 = NE4 =
NE5 = Low
Supply current, power
down
11,12,22,
23, 24
1.1
1.2
ICCPD2
ICCR1
0.5
mA
mA
A
A
Supply current, read
mode, oscillator
disabled
IIR = II2 = II3 = II4 = II5 =
500 µA
11,12,22,
23, 24
115
IIR = II2 = II3 = II4 = II5 =
500 µA,
ENOSC = High,
RS = 560 Ω,
RF = 7.5 kΩ,
SELA = High
Supply current, read
mode, oscillator
enabled, output A
selected
11,12,22,
23, 24
1.3
1.4
ICCR2
120
mA
A
IIR = II2 = II3 = II4 = II5 =
500 µA,
NE2 = NE3 = NE4 =
NE5 = Low
Supply current, write
mode
11,12,22,
23, 24
ICCW
ICCoff
320
18
mA
mA
A
A
Supply current, input
off
IIR = II2 = II3 = II4 = II5 =
0 µA
11,12,22,
23, 24
1.5
2
Digital Inputs
NE2/NE3/NE4/NE5
low voltage
2.1
6, 7, 8, 9
6, 7, 8, 9
VNELO
VNEHI
1.1
V
V
A
A
NE2/NE3/NE4/NE5
high voltage
2.2
2.0
2.3
2.4
2.5
2.6
2.7
2.8
3
SELA low voltage
14
14
10
10
13
13
VSELALO
VSELAHI
VENLO
VENHI
0.5
0.5
0.5
V
V
V
V
V
V
A
A
A
A
A
A
SELA high voltage
ENABLE low voltage
ENABLE high voltage
ENOSC low voltage
ENOSC high voltage
2.0
2.0
2.0
VEOLO
VEOHI
Currents at Digital Inputs
NE2/NE3/NE4/NE5
low current
3.1
3.2
NE = 0 V
6, 7, 8, 9
6, 7, 8, 9
INELO
INEHI
-300
µA
µA
A
A
NE2/NE3/NE4/NE5
high current
NE = 5 V
800
3.3
3.4
3.5
3.6
3.7
3.8
SELA low current
SELA = 0 V
14
14
10
10
13
13
ISELALO
ISELAHI
IENLO
-45
µA
µA
µA
µA
µA
µA
A
A
A
A
A
A
SELA high current
ENABLE low current
ENABLE high current
ENOSC low current
ENOSC high current
SELA = 5 V
150
100
800
ENABLE = 0 V
ENABLE = 5 V
ENOSC = 0 V
ENOSC = 5 V
-150
-100
IENHI
IEOLO
IEOHI
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note:
1. Related to QFN28 Package
6
T0800
4503D–DVD–02/05
T0800
7. Electrical Characteristics: Laser Amplifier
VCC = 5 V, Tamb = 25°C, ENABLE = High, unless otherwise specified
No.
4
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
Outputs IOUTA and IOUTB
15, 16,
20, 21
4.1
4.2
4.3
4.5
4.6
4.7
4.8
4.9
Best fit current gain
Best fit current offset
Any channel(1)
GAIN
IOS
90
-8
100
130
+4
mA/mA
mA
%
A
A
A
A
A
A
C
A
A
15, 16,
20, 21
Any channel(1)
Any channel(1)
Output is sourcing
Output current
linearity
15, 16,
20, 21
ILIN
-3
+3
Output current per
channel
15, 16,
20, 21
IOUTR
IOUT
200
250
170
mA
mA
Ω
15, 16,
20, 21
Total output current
1, 2, 26,
27, 28
I
IN input impedance
RIN is to GND
RIN
220
270
Temperature
stabilized
6, 7, 8,
9
NE threshold
VTH
IOFF1
IOFF2
1.68
V
15, 16,
20, 21
Output off current 1
ENABLE = Low
1
1
mA
mA
NE2 = NE3 = NE4 =
NE5 = High
15, 16,
20, 21
4.10 Output off current 2
4.11 Output off current 3
NE2 = NE3 = NE4 =
NE5 = Low,
IIR = II2 = II3 = II4 = II5 =
0 µA
15, 16,
20, 21
IOFF3
5
mA
A
IOUT = 40 mA,
IOUT supply sensitivity,
read mode
15, 16,
20, 21
4.12
VCC = 5 V ±10%,
VSER
VSEW
-5
-6
1
0
%V
%V
A
A
read-only
I
OUT = 80 mA, 40 mA
IOUT supply sensitivity,
write mode
15, 16,
20, 21
4.13
read + 40 mA write,
VCC = 5 V ±10%
IOUT current output
noise
IOUT = 40 mA,
ENOSC = Low
15, 16,
20, 21
nA/
rt-Hz
4.14
INOO
TSER
TSEW
3
C
C
C
IOUT temperature
4.15
IOUT = 40 mA, read
15, 16,
20, 21
-100
-300
ppm/°C
ppm/°C
sensitivity, read mode only
IOUT temperature
sensitivity, write mode read + 40 mA write
IOUT = 80 mA, 40 mA
15, 16,
20, 21
4.16
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note:
1. Linearity of the amplifier is calculated using a best fit method at three operating points of IOUT at 20 mA, 40 mA, and
60 mA, IOUT = (IIN × GAIN) + IOS
7
4503D–DVD–02/05
8. Electrical Characteristics
VCC = 5 V, IOUT = 40 mA DC with 40-mA pulse, Tamb = 25°C, unless otherwise specified
No.
5
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
Outputs IOUTA and IOUTB, AC Performance
IOUT = 40 mA (read)
Write rise time
15,16,
20, 21
5.1
5.2
5.3
5.4
5.5
tRISE
tFALL
OS
1.0
1.1
5
3.0
3.0
ns
ns
%
C
C
C
C
C
+40 mA (10%-90%)(1)
IOUT = 40 mA (read)
Write fall time
15,16,
20, 21
+40 mA (10%-90%)(1)
Output current
overshoot
IOUT = 40 mA (read) +
40 mA(1)
15,16,
20, 21
NE 50% High-Low to
IOUT at 50% of final value
15,16,
20, 21
IOUT ON prop delay
tON
2.0
2.0
ns
ns
IOFF OFF prop
delay
NE 50% Low-High to
15,16,
20, 21
tOFF
I
OUT at 50% of final value
ENABLE 50% High-Low
to IOUT at 50% of final
value
15,16,
20, 21
5.6
5.7
5.8
5.9
Disable time
Enable time
tDIS
20
20
4
ns
ns
ns
ns
C
C
C
C
ENABLE 50% Low-High
to IOUT at 50% of final
value
15,16,
20, 21
tEN
ENOSC 50% Low-High
to IOUT at 50% of final
value
Disable time
oscillator
15,16,
20, 21
TDISO
ENOSC 50% High-Low
to IOUT at 50% of final
value
Enable time
oscillator
15,16,
20, 21
TENO
2
SELA Low-High 50% to
IOUT at 50% of final value
15,16,
20, 21
5.10
5.11
SELA delay
SELA delay
TSAH
TSAL
TBD
TBD
20
ns
ns
C
C
C
SELA High-Low 50% to
15,16,
20, 21
I
OUT at 50% of final value
Amplifier
bandwidth
IOUT = 50 mA, all
channels, -3 dB value
15,16,
20, 21
5.12
6
BWLCA
MHz
Oscillator
Oscillator
frequency
15,16,
20, 21
6.1
RF = 4.7 kΩ
RF = 4.7 kΩ
FOSC
380
470
560
MHz
A
C
Oscillator
temperature
coefficient
15,16,
20, 21
6.2
6.3
6.4
TCOSC
-150
ppm/°C
ENOSC 50% High-Low
to IOUT, at 10%/90% of
final value
Disable time
oscillator
15,16,
20, 21
TDISO
4
2
ns
ns
C
C
ENOSC 50% Low-High
to IOUT, at 10%/90% of
final value
Enable time
oscillator
15,16,
20, 21
TENO
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
8
T0800
4503D–DVD–02/05
T0800
9. Application Information Oscillator
Figure 9-1. Frequency versus Resistor RFA and RFB (RS = 525 Ω)
550
500
450
400
350
300
250
200
4.0
5.0
6.0
7.0
8.0
9.0
10.0
1200.0
500.0
RFA, RFB (kΩ)
Figure 9-2. Swing versus Resistor RSA and RSB (RF = 7.82 kΩ)
120
100
80
60
40
20
0
0.0
200.0
400.0
600.0
800.0
1000.0
RSA, RSB (Ω)
Figure 9-3. Frequency Dependency of Swing
60
50
40
30
20
10
0
200.0
250.0
300.0
350.0
400.0
450.0
Frequency (MHz)
9
4503D–DVD–02/05
Figure 9-4. Transfer Characteristic of all Channels (Gain = 111)
350
300
250
200
150
100
50
0
0.0
500.0
1000.0
1500.0
2000.0
2500.0
3000.0
IR/I2/I3/I4/I5 (mA)
Figure 9-5. Output Characteristic (Voltage Compliance) R(IOUT) = 5.8 Ω
350
300
250
200
150
100
50
0
0.0
1.0
2.0
3.0
4.0
5.0
VCC - V(IOUT)/V
Figure 9-6. Output Pulse, Read: 50 mA, Write: 250 mA pk-pk
10
T0800
4503D–DVD–02/05
T0800
Figure 9-7. Timing Diagram of IOUT
ENABLE
NE2
NE3
NE4
NE5
tOFF
tON
tOFF
tON
tOFF
tON
IOUT
tOFF
tON
tr
tf
tDIS
tr
tf
tEN
tf
tr
tf
tr
Figure 9-8. Application Circuit
VCC
LD
A
n
a
l
o
g
IR
I2
I3
I4
I5
VCC1
1
24
23
22
21
20
19
18
17
16
15
14
13
VCC2
IOUTA
IOUTA
GND
2
3
4
5
RFA
RFB
RSA
6
RSB
7
NE2
IOUTB
IOUTB
SELA
ENOSC
VCC2
LD
8
D
i
g
i
NE3
9
NE4
10
11
12
NE5
ENABLE
VCC
t
a
l
11
4503D–DVD–02/05
10. Ordering Information
Extended Type Number
Package
SSO24
QFN28
Remarks
T0800-TNQ
Taped and reeled
Taped and reeled
T0800-PJQ
11. Package Information
5.7
5.3
Package SSO24
Dimensions in mm
8.05
7.80
4.5
4.3
1.30
0.15
0.25
0.65
0.15
0.05
6.6
6.3
7.15
24
13
technical drawings
according to DIN
specifications
1
12
12
T0800
4503D–DVD–02/05
T0800
13
4503D–DVD–02/05
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