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ADN2848 Datasheet(PDF) 4 Page - Analog Devices

Part No. ADN2848
Description  3 V Dual-Loop 50 Mbps to 1.25 Gbps Laser Diode Driver
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADN2848 Datasheet(HTML) 4 Page - Analog Devices

 
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REV. 0
–4–
ADN2848
PIN CONFIGURATION
TOP VIEW
16 CLKN
15 CLKP
14 GND1
13 DATAP
VCC2 25
IMODN 26
GND2 27
12 DATAN
11 VCC1
10 PAVCAP
9 ERCAP
IMODP 28
GND2 29
GND2 30
IBIAS 31
CCBIAS 32
ADN2848
PIN FUNCTION DESCRIPTIONS
Pin Number
Mnemonic
Function
1
LBWSET
Loop Bandwidth Select
2
ASET
Alarm Threshold Set Pin
3
ERSET
Extinction Ratio Set Pin
4
PSET
Average Optical Power Set Pin
5
IMPD
Monitor Photodiode Input
6IMPDMON
Mirrored Current from Monitor Photodiode—Current Source
7
GND4
Supply Ground
8VCC4
Supply Voltage
9
ERCAP
Extinction Ratio Loop Capacitor
10
PAVCAP
Average Power Loop Capacitor
11
VCC1
Supply Voltage
12
DATAN
Data Negative Differential Terminal
13
DATAP
Data Positive Differential Terminal
14
GND1
Supply Ground
15
CLKP
Data Clock Positive Differential Terminal, Used if CLKSEL = VCC
16
CLKN
Data Clock Negative Differential Terminal, Used if CLKSEL = VCC
17
CLKSEL
Clock Select (Active = VCC), Used if Data Is Clocked into Chip
18
DEGRADE
DEGRADE Alarm Output
19
FAIL
FAIL Alarm Output
20
ALS
Automatic Laser Shutdown
21
VCC3
Supply Voltage
22
GND3
Supply Ground
23
IMMON
Modulation Current Mirror Output—Current Source
24
IBMON
Bias Current Mirror Output—Current Source
25
VCC2
Supply Voltage
26
IMODN
Modulation Current Negative Output, Connect via Matching Resistor to VCC
27
GND2
Supply Ground
28
IMODP
Modulation Current Positive Output, Connect to Laser Diode
29
GND2
Supply Ground
30
GND2
Supply Ground
31
IBIAS
Laser Diode Bias Current Output
32
CCBIAS
Extra Laser Diode Bias When AC-Coupled—Current Sink


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