ADN2843 Analog Devices, ADN2843 Datasheet - Page 7

• Manufacturer Part Number: ADN2843
• Description: 10.7 Gbps, 3.3V Laser Diode Driver With Dual-loop Control
• Manufacturer: Analog Devices

REV. PrA 14-Jan-2002
Pin
Pin
18
10
11
12
13
14
15
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
10
11
12
13
14
15
16
17
16
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
ADN2844
ASET
ERSET
PSET
GND
IMPD
IMPDMON
IMPDMON2
IMPD2
GND4
VCC4
ERCAP
PAVCAP
GND
GND
GND
GND
GND
GND
DEGRADE
FAIL
ALS
IMMON
IBMON
IDTONE
GND3
VCC3
IBIAS_CTRL
GND2
IMOD_CTRL
CCBIAS
GND
LBWSET
ADN2845
DATAN
GND
VBB
GND
DATAP
ALS
IMOD_CTRL
IBIAS_CTRL
GND
VCC
IBIAS
IMODP
GND
VCC
GND
VCC
VCC
VCC
PRELIMINARY TECHNICAL DATA
PIN FUNCTION DESCRIPTION
FUNCTION
Alarm current threshold set
Extinction Ratio Current Set
Average Optical Power set pin.
Test Input (nc8)
Monitor Photo Diode current input.
Mirrored current from IMPD
Mirrored current from IMPD2 (For optional use with two MPDs)
Optional second MPD current input
Negative supply
Positive supply
Extinction Ratio loop capacitor
Average Power Loop capacitor
Test Input (nc7)
Test Input (nc4)
Test Input (nc3)
Test Input (nc2)
Test Input (nc1)
Test Input (nc6)
DEGRADE Alarm output, open collector, active high
FAIL Alarm output, open collector, active high
Automatic Laser Shutdown Logic Input
Modulation current mirror output, current source from VCC
Bias current mirror output, current source from VCC
Id Tone input current.
Negative supply
Positive supply
Control output current sink.
Negative supply
Control output current sink.
Connected to Laser diode side of cap when AC coupling used, otherwise, tie to VCC.
Test Input (nc5)
Select Low Loop Bandwidth Mode (Active=VCC)
FUNCTION
AC Coupled CML Data, negative differential terminal
Negative Supply
CML Data termination voltage output.
Negative Supply
AC Coupled CML Data, positive differential terminal
Automatic Laser Shutdown Logic Input
Modulation current control input (Control circuit sinks IMOD/10 from pin to GND)
Bias current control input (Control circuit sinks IBIAS/10 from pin to GND)
Negative Supply
Positive supply.
Bias current
Modulation current
Negative Supply
VCC connection for IMODN termination resistor
Negative Supply
Positive supply
Positive supply
Positive supply
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ADN2843