REV. 0

ADN2841

–4–

PIN FUNCTION DESCRIPTIONS

Pin No.

48-Lead

32-Lead

Mnemonic

Function

1

GND

Supply Ground

2

1

LBWSET

3

2

ASET

Alarm Current Threshold Setting Pin

4

3

ERSET

Extinction Ratio Set Pin

5

4

PSET

Average Optical Power Set Pin

6

GND

Ground

7

5

IMPD

Monitor Photodiode Input

8

6

IMPDMON

Mirrored Current from Monitor Photodiode

9

IMPDMON2

Mirrored Current from Monitor Photodiode 2 (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

GND

Ground

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

22

16

CLKN

23

GND

Ground

24

GND

Ground

25

GND

Ground

26

17

CLKSEL

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

34

GND2

Supply Ground

35

IDTONE

IDTONE (Requires external current sink to ground)

36

GND2

Supply Ground

PIN CONFIGURATIONS

48-Lead LFCSP

PIN 1

INDICATOR

ADN2841

TOP VIEW

(Not to Scale)

GND2 37

VCC2 38

IMODN 39

IMODN 40

GND2 41

IMODP 42

IMODP 43

GND2 44

GND2 45

IBIAS 46

IBIAS 47

CCBIAS 48

24 GND

23 GND

22 CLKN

21 CLKP

20 GND1

19 DATAP

18 DATAN

17 GND1

16 VCC1

15 GND

14 PAVCAP

13 ERCAP

32-Lead LFCSP

PIN 1

INDICATOR

TOP VIEW

(Not to Scale)

LBWSET 1

ASET 2

ERSET 3

PSET 4

IMPD 5

IMPDMON 6

GND4 7

VCC4 8

ADN2841

24 IBMON

23 IMMON

22 GND3

21 VCC3

20 ALS

19 FAIL

18 DEGRADE

17 CLKSEL