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參數(shù)資料
| 型號： | GD16521 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 2.5 GBIT/S RE TIMING LASER DRIVER |
| 中文描述： | 2.5 Gbit / s的稀土激光驅(qū)動(dòng)時(shí)序 |
| 文件頁數(shù)： | 6/13頁 |
| 文件大?。?/td> | 166K |
| 代理商： | GD16521 |
Pin List
Mnemonic:
Pad and Pin No.:
Pin Type:
Description:
SDIP
SDIN
4
5
CML IN
Data inputs. Internally terminated with 50
to TDIP/TDIN.
TDIP
TDIN
3
6
CML IN
Loop through termination pins for SDIP and SDIN respectively.
SCIP
SCIN
9
10
CML IN
Clock inputs. Internally terminated with 50
to TCIP/TCIN.
TCIP
TCIN
8
11
CML IN
Loop through termination pins for SDIP and SDIN respectively.
IM
29, 30
OPEN
COLLECTOR
Laser Driver Output (2.5 Gbit/s). IM sinks a modulation current,
which is controlled by the pin IMSET. A logic HI on SDIP corre-
sponds to IM sinking current.
IMB
31, 32
OPEN
COLLECTOR
Laser Driver inverted Output (2.5 Gbit/s). IMB sinks a modulation
current, which is controlled by the pin IMSET. Connect to VCC
through 20 to 25
.
IB
27
OPEN
COLLECTOR
Pre-bias current output. IB sinks a current, which is controlled by
the pin IMC.
IMSET
40
ANL OUT
Modulation current control monitor output. This pin is the output of
the modulation current control loop OP-amp. For stability a capa-
citor may be added between this pin and the IMC pin.
IBSET
22
ANL OUT
Pre-bias current control monitor output. This pin is the output of
the optical power control loop OP-amp. For stability a capacitor
may be added between this pin and the OPSET pin.
IBM
23
ANL OUT
Pre-bias current mirror output. The sink current into the IBM pin is
1/20 of the pre-bias current.
IMM
39
ANL OUT
Modulation current mirror output. The sink current into the IMM
pin is 1/20 of the modulation current. Internally IMM is connected
to the positive input of the modulation current control loop
OP-amp.
AR
25
ANL OUT
Anti-rush current sink. AR sinks a 1 mA current when SHDW is
high. Typically connected together with PD to the monitor diode.
MARKP
MARKN
35
36
ANL OUT
Mark-space monitor outputs. High impedance CML outputs.
MTJ
38
ANL OUT
Temperature monitor.
IMC
41
ANL IN
Modulation current setting. The modulation current will automati-
cally be adjusted to this value if the internal modulation control
loop is used. The IMC pin is the negative input of the modulation
current control loop OP-amp.
PD
26
ANL IN
Positive input of the automatic optical power control loop OP-amp,
used to control the pre-bias current. Typically connected to the
monitor diode photo detector of the laser diode.
OPSET
19
ANL IN
Negative input of the automatic optical power control loop
OP-amp, used to control the pre-bias current. Typically connected
to an external reference voltage.
FFSET
15
LVTTL IN
When FFSET is low data is re-timed. When high data re-timing is
bypassed.
SHDW
16
LVTTL IN
Modulation and pre-bias current shutdown input.
Set high for shutdown, low for normal operation.
DUTY
48
ANL IN
Input for control of the mark-space ratio of the output. Decreasing
the voltage of the DUTY pin increases the pulse width of a current
high into the IM pin. Typically connected to VEE through resistor.
VCC
14, 18, 20, 28, 33,
42, 46
PWR
Positive supply pins for laser driver part.
VCCCONT
44
PWR
Positive supply pin for modulation current control system.
Data Sheet Rev.: 11
GD16521
Page 6 of 13
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