10.7Gbps Laser Diode Drivers

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7

10.7Gbps Laser Diode Drivers

Pad Description

PAD

MAX3930

MAX3931/

MAX3932

NAME

FUNCTION

1, 5, 9, 12,

22, 23, 28,

29

1, 3, 5, 7,

9, 10, 12,

22, 23, 28,

29

2

2

DATA+

Noninverting Data Input. CML with on-chip termination resistor.

3

—

Terminating Voltage for Data Inputs

4

4

DATA-

Inverting Data Input. CML with on-chip termination resistor.

6

6

CLK+

Noninverting Clock Input for Data Retiming. CML with on-chip termination resistor.

7

—

Terminating Voltage for Clock Inputs

8

8

CLK-

Inverting Clock Input for Data Retiming. CML with on-chip termination resistor.

10, 11, 17,

18, 21, 32,

35, 36, 37

11, 17, 18,

19, 32, 35,

36, 37

13

13

RTEN

TTL/CMOS Data Retiming Input. Low for latched data, high for direct data. Internal

100k

14

14

PWC+

Positive Input for Modulation Pulse-Width Adjustment. Connected to ground through

15

15

PWC-

Negative Input for Modulation Pulse-Width Adjustment. Connected to ground

16

16

MODEN

TTL/CMOS Modulation Enable Input. Low for normal operation, high to switch

modulation output off. Internal 100k

19

20

MODMON

20

21

MODSET

Modulation Current Set. Connected to the output of the external operational

amplifier (see the Design Procedure section).

24, 27

24, 27

MODN2,

MODN1

25, 26

25, 26

MOD2,

MOD1

Laser Modulation Current Outputs

30

30

BIAS

Laser Bias Current Output

31

31

N.C.

No Connection. Leave unconnected.

33

33

BIASSET

Bias Current Set. Connected to the output of the external operational amplifier (see

the Design Procedure section).

34

34

BIASMON