DBD-R2V1-S [ETC]
Dual Mode Bi-directional Dual Input Laser Driver; 双模双向双输入激光驱动器
| 型号： | DBD-R2V1-S |
| 厂家： | 
ETC |
| 描述： | Dual Mode Bi-directional Dual Input Laser Driver |
| 文件： | 总6页 (文件大小：261K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DBD-R2V1
Analog Technologies, Inc.
Dual Mode Bi-directional Dual Input Laser Driver
Main features: dual control mode, bi-directional output, dual input mode (analog & digital), high
precision, high reliability, and small package.
Part number:
DBD-R2V1
Maximum output current on LDA and LDC: 200mA
Output voltage range on LDA:
Output voltage range on LDC:
Laser current and power control accuracy:
Laser current control resolution:
Laser power control resolution:
0.8V ¾ 8V
-0.8V ¾ -8V
14bit
48.8mA/step
0.024%/step
Laser current & power digital control signal: TTL, serial
Laser current set-point voltage:
Laser power set-point voltage:
0 to 2.5V
0 to 2.5V
Laser current and power indication voltage: 0 to 2.5V
Laser current indication absolute accuracy: ±0.2%
Current output noise:
Soft-start rise time:
Power input DC voltage:
Operation mode:
0.1% RMS
0.1 S
4.75V to 5.25V
CC (Constant Current) and CP (Constant Power)
-20°C to +85°C
Operating temperature:
Module dimension:
25.5mm ´ 20 mm ´ 4.5mm
Pin Descriptions
Pin 1 SD, shut down, digital input, positive logic, >2.3V = shut down, <0.5V = enable, normal
threshold voltage = 1V. The input current is between - 1mA and 1mA. It is pulled down by a 20K
resistor to ground.
Pin 2 CLGD, control loop good indication, digital output. The maximum output current is 10mA. A HI
level indicates control loop locked.
Pin 3 GND, signal ground pin. Connect ADC and DAC grounds to here.
Pin 4 2.5V, reference voltage, analog output. It is used by the internal DACs as the reference voltage. It
can source and sink 5mA current with a maximum 20ppm/°C stability max.
Pin 5 LIS, laser current set-point voltage, analog input. 0V to 2.5V sets the output current from 0 to
200mA linearly. The input impedance of this pin is 20KW. This pin can be set by an external
analog signal source, such as the output of a closed-loop op-amp, POT, or DAC, or set by the
internal DAC B and leave LPS pin unconnected. The internal DAC is connected to the reference
voltage 2.5V, so that its full scale is 2.5V.
550 E. W eddell Drive, Suite 4 , Sunnyvale, C A 9 4 0 8 9 , U. S. A . Tel.: (4 0 8 ) 7 4 7 -9 7 6 0 , Fax: (4 0 8 ) 7 4 7 -9 7 7 0 , W eb: w w w .analogtechnologies.com
ã Copyright 2000 – 2003, Analog Technologies, Inc. All Rights Reserved.
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DBD-R2V1
Analog Technologies, Inc.
Pin 6 LIO, laser current output indication, analog output. 0V to 2.5V indicates the laser current of from
0 to 200mA linearly.
Pin 7 LPS, laser power set-point voltage, analog input. 0V to 2.5V sets the laser output power from 0 to
the maximum value linearly. The input impedance of this pin is 20KW. This pin can be set by an
external analog signal source, such as the output of a closed-loop op-amp, POT, or DAC, or set by
the internal DAC A and leave this LPS pin unconnected. The internal DAC is connected to the
reference voltage 2.5V, so that its full scale is 2.5V.
Pin 8 LPI, laser power feedback input, analog input. High impedance input. The (positive-going) output
of an external power sense photodiode amplifier should be connected to this pin. Maximum
power for a given laser diode should correspond to 2.5 V.
Pin 9 LDA, laser diode anode, analog output. This pin is used to drive a laser of which the cathode is
connected to the case and the case is connected to the ground. When using this pin, the laser
anode needs to be connected to the ground. See Figure 1A.
Pin 10 LDC, laser diode cathode, analog output. This pin is used to drive a laser of which the anode is
connected to the case and the case is connected to the ground. When using this pin, the laser
cathode needs to be connected to the ground. See Figure 1B.
Pin 11 GND, ground. Connect laser anode or cathode to here.
Pin 12 GND, ground. Connect power supply return rail to here.
Pin 13 VPS, power supply, analog power input. The driver works at 5.0V.
Pin 14 SCK, serial interface clock, high impedance digital input. See Linear Tech LTC1654 data sheet.
Pin 15 SDI/MIND, serial data input/mode indication, digital input and output. The input impedance is
20KW. When used as an output, a HI (=VPS) indicates constant current mode operation and a LO
(=GND) indicates constant power mode. When used as an input, is the data input to the serial
interface DACs. See Linear Tech LTC1654 data sheet.
Pin 16 CSLD, control/serial port/load, high impedance digital input. This pin is the DACs’ input for
serial interface enable and load control. See Linear Tech LTC1654 data sheet.
Mode Setting
A. Set the driver to constant current mode without over power protection
Under this mode, the laser is always operating at constant current mode.
1. Set LIS = 2.5V ´ Ilaser ÷ 200mA, where Ilaser is the set-point laser current. LIS can be set by the
way described in the pin description section.
2. Set LPS to 2.5V reference and connect LPI pin to ground. LPS can be set by the way described in
the pin description section.
B. Set the driver to constant current mode with over power protection
Under this mode, the laser is operating at the constant current mode unless the laser output power reaches
the preset maximum power. When the laser output power reaches the protection power, the laser will be
operating at a constant power mode.
550 E. W eddell Drive, Suite 4 , Sunnyvale, C A 9 4 0 8 9 , U. S. A . Tel.: (4 0 8 ) 7 4 7 -9 7 6 0 , Fax: (4 0 8 ) 7 4 7 -9 7 7 0 , W eb: w w w .analogtechnologies.com
ã Copyright 2000 – 2003, Analog Technologies, Inc. All Rights Reserved.
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DBD-R2V1
Analog Technologies, Inc.
1. Set LIS = 2.5V ´ Iset ÷ 200mA, where Ilaser is a laser set-point current. LIS can be set by the way
described in the pin description section.
2. Set LPS to a voltage value which will be generated at the LPI pin by the external TIA (Trans-
Impedance Amplifier) when the laser is outputting the protection power. The TIA converts the
current of the PD (Photo Diode) into a voltage which is fed into the LPI pin. The PD current is
generated by the laser. LPS can be set by the way described in the pin description section. Make
sure that the set-point laser current is at least 5% less than the current needed to generate the
maximum laser power.
C. Set the driver to constant power mode without over current protection
Under this mode, the laser is operating at the constant power mode unless the laser current reaches
200mA. When the laser output power reaches 200mA, the laser will be operating at a constant current
mode.
1. Connect LIS to 2.5V reference pin, or set LIS by the way described in the pin description section.
2. Set LPS to a voltage value which will be generated at the LPI pin by the external TIA (Trans-
Impedance Amplifier) when the laser is outputting the set-point power. The TIA converts the
current of the PD (Photo Diode) into a voltage which is fed into the LPI pin. The PD current is
generated by the laser. LPS can be set by the way described in the pin description section. Make
sure that the laser can output the set-point power by a current of less than 190mA.
D. Set the driver to constant power mode with over current protection
Under this mode, the laser is operating at the constant power mode unless the laser current reaches a
predetermined protection current. When the laser reaches the protection current, the laser will be operating
at a constant current mode.
1. Set LIS = 2.5V ´ Iprotect ÷ 200mA, where Iprotect is predetermined protection current. LIS can be set
by the way described in the pin description section.
2. Set LPS to a voltage value which will be generated at the LPI pin by the external TIA (Trans-
Impedance Amplifier) when the laser is outputting the set-point power. The TIA converts the
current of the PD (Photo Diode) into a voltage which is fed into the LPI pin. The PD current is
generated by the laser. LPS can be set by the way described in the pin description section. Make
sure that the laser can output the set-point power by a current of less than 95% of the protection
current.
Mounting the High Precision Digital Input Laser Driver on PCB’s
The high precision digital input laser drivers come in two types of packages: surface mount and through
hole. The surface mount package has to be soldered manually, not by reflow oven. The through hole
package can be mounted through a socket, soldered manually, or by wave soldering machine.
550 E. W eddell Drive, Suite 4 , Sunnyvale, C A 9 4 0 8 9 , U. S. A . Tel.: (4 0 8 ) 7 4 7 -9 7 6 0 , Fax: (4 0 8 ) 7 4 7 -9 7 7 0 , W eb: w w w .analogtechnologies.com
ã Copyright 2000 – 2003, Analog Technologies, Inc. All Rights Reserved.
3
DBD-R2V1
Analog Technologies, Inc.
DBD-R2V1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
To micro-controller
To micro-controller
To signal GND
To ADC
SD
CSLD
SDI/MIND
SCK
To micro-controller
To micro-controller
To micro-controller
+5V
CLGD
GND
2.5V
LIS
VPS
N/C
GND
To power supply GND
To ADC
10K to 1M
LIO
LPS
GND
N/C
LDC
N/C
R1
2
1
LPI
LDA
5V
D1
2
3
Laser
6
OPA350
Signal GND
U1
Front_PD
Case Conductor
Signal GND
Figure 1A Driving a Common Cathode Laser
DBD-R2V1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
To micro-controller
To micro-controller
To signal GND
To ADC
SD
CSLD
SDI/MIND
SCK
To micro-controller
To micro-controller
To micro-controller
+5V
CLGD
GND
2.5V
LIS
VPS
N/C
N/C
GND
To power supply GND
To ADC
LIO
LPS
GND
LDC
10K to 1M
2
R1
1
LPI
LDA
N/C
5V
2
D1
Laser
6
U1
3
Front_PD
OPA350
Signal GND
Case Conductor
Signal GND
Figure 1B Driving a Common Anode Laser
550 E. W eddell Drive, Suite 4 , Sunnyvale, C A 9 4 0 8 9 , U. S. A . Tel.: (4 0 8 ) 7 4 7 -9 7 6 0 , Fax: (4 0 8 ) 7 4 7 -9 7 7 0 , W eb: w w w .analogtechnologies.com
ã Copyright 2000 – 2003, Analog Technologies, Inc. All Rights Reserved.
4
DBD-R2V1
Analog Technologies, Inc.
Mechanical dimensions
8
7
6
5
4
3
2
1
9
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SD
CSLD
SDI/MIND
SCK
2.54mm
10
11
12
13
14
15
16
CLGD
GND
25.5mm
VPS
2.5V
LIS
GND
1.26mm
LIO
GND
LDC
LPS
LPI
LDA
18mm
20mm
2.26mm
1.26mm
Figure 2 Top View of DBD-R2V1-S
Figure 3 Bottom View of DBD-R2V1-S
4.5mm
3mm
0.42mm
18mm
4.5mm
Figure 5 End View of DBD-R2V1-D
Figure 4 End View of DBD-R2V1-S
4.5mm
3mm
0.6mm
2.54mm
Figure 6 Side View of DBD-R2V1-D
550 E. W eddell Drive, Suite 4 , Sunnyvale, C A 9 4 0 8 9 , U. S. A . Tel.: (4 0 8 ) 7 4 7 -9 7 6 0 , Fax: (4 0 8 ) 7 4 7 -9 7 7 0 , W eb: w w w .analogtechnologies.com
ã Copyright 2000 – 2003, Analog Technologies, Inc. All Rights Reserved.
5
DBD-R2V1
Analog Technologies, Inc.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Solder Pad
2.54mm
26mm
1.35mm
Outline
17.5mm
21.5mm
2.9mm
Figure 7 Recommended PCB Footprint for Surface Mount Package
Ordering Guide
Description
Part Number
DBD-R2V1-D
DBD-R2V1-S
Note
DIP package
SMT package
High precision input laser driver
High precision input laser driver
550 E. W eddell Drive, Suite 4 , Sunnyvale, C A 9 4 0 8 9 , U. S. A . Tel.: (4 0 8 ) 7 4 7 -9 7 6 0 , Fax: (4 0 8 ) 7 4 7 -9 7 7 0 , W eb: w w w .analogtechnologies.com
ã Copyright 2000 – 2003, Analog Technologies, Inc. All Rights Reserved.
6
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