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ADN2847 Datasheet(PDF) 5 Page - Analog Devices

Part No. ADN2847
Description  3 V Dual-Loop 50 Mbps to 3.3 Gbps Laser Diode Driver
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADN2847 Datasheet(HTML) 5 Page - Analog Devices

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ADN2847
–5–
PIN CONFIGURATION
32-Lead LFCSP
PIN 1
INDICATOR
ADN2847
TOP VIEW
LBWSET 1
ASET 2
ERSET 3
PSET 4
IMPD 5
IMPDMON 6
GND4 7
VCC4 8
24 IBMON
23 IMMON
22 GND3
21 VCC3
20 ALS
19 FAIL
18 DEGRADE
17 CLKSEL
48-Lead LFCSP
PIN 1
INDICATOR
ADN2847
TOP VIEW
TP1 1
LBWSET 2
ASET 3
ERSET 4
PSET 5
TP2 6
IMPD 7
IMPDMON 8
IMPDMON2 9
IMPD2 10
GND4 11
VCC4 12
36 GND2
35 IDTONE
34 GND2
33 IBMON
32 IMMON
31 GND3
30 VCC3
29 ALS
28 FAIL
27 DEGRADE
26 CLKSEL
25 TP6
PIN FUNCTION DESCRIPTIONS
Pin Number
48-Lead
32-Lead
Mnemonic
Function
1
TP1
Test Pin. In normal operation, TP1 = GND.
21
LBWSET
Select Low Loop Bandwidth
32
ASET
Alarm Current Threshold Setting Pin
43
ERSET
Extinction Ratio Set Pin
54
PSET
Average Optical Power Set Pin
6
TP2
Test Pin. In normal operation, TP2 = GND.
75
IMPD
Monitor Photodiode Input
86
IMPDMON
Mirrored Current from Monitor Photodiode
9
IMPDMON2
Mirrored Current from Monitor Photodiode2 (for Use with Two MPDs)
10
IMPD2
Monitor Photodiode Input 2 (for Use with Two MPDs)
11
7
GND4
Supply Ground
12
8
VCC4
Supply Voltage
13
9
ERCAP
Extinction Ratio Loop Capacitor
14
10
PAVCAP
Average Power Loop Capacitor
15
TP3
Test Pin. In normal operation, TP3 = GND.
16
11
VCC1
Supply Voltage
17
GND1
Supply Ground
18
12
DATAN
Data, Negative Differential Terminal
19
13
DATAP
Data, Positive Differential Terminal
20
14
GND1
Supply Ground
21
15
CLKP
Data Clock Positive Differential Terminal, Used if CLKSEL = VCC
22
16
CLKN
Data Clock Negative Differential Terminal, Used if CLKSEL = VCC
23
TP4
Test Pin. In normal operation, TP4 = GND.
24
TP5
Test Pin. In normal operation, TP5 = GND.
25
TP6
Test Pin. In normal operation, TP6 = GND.
26
17
CLKSEL
Clock Select (Active = VCC), Used if Data Is Clocked into Chip
27
18
DEGRADE
DEGRADE Alarm Output
28
19
FAIL
FAIL Alarm Output
29
20
ALS
Automatic Laser Shutdown
30
21
VCC3
Supply Voltage
31
22
GND3
Supply Ground
32
23
IMMON
Modulation Current Mirror Output
33
24
IBMON
Bias Current Mirror Output


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