MAX3656(2010) Просмотр технического описания (PDF) - Maxim Integrated

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производитель

MAX3656
(Rev.:2010)

155Mbps to 2.5Gbps Burst-Mode Laser Driver

Maxim Integrated 

155Mbps to 2.5Gbps Burst-Mode

Laser Driver

Pin Description

PIN

1, 4, 9,

15, 18, 21

2

3

5

6

7

8, 11, 19

10

12

13

14

16

17

20

22

23

24

—

NAME

FUNCTION

VCC

Power-Supply Voltage

IN+

IN-

BEN+

BEN-

EN

GND

FAIL

LONGB

BIAS-

BIAS+

OUT+

OUT-

MD

BIASMAX

MODSET

APCSET

EP

Noninverting Data Input with On-Chip Biasing

Inverting Data Input with On-Chip Biasing

Noninverting Burst-Enable Input with On-Chip Biasing

Inverting Burst-Enable Input with On-Chip Biasing

TTL/CMOS Enable Input. Low for normal operation. Pull high or leave unconnected to disable laser

bias and modulation currents.

Power-Supply Ground

TTL/CMOS Failure Output. Indicates APC failure when low.

TTL/CMOS Long Burst (See the Setting the LONGB Input Pin Section)

Inverting Laser Bias-Current Output. Connect through 10
resistor and switching diode to VCC.

Noninverting Laser Bias-Current Output. Bias current flows into this pin when BEN is high. Minimize

capacitance on this pin.

Noninverting Laser Modulation-Current Output. Modulation current flows into this pin when BEN and IN

are high.

Inverting Laser Modulation-Current Output. Connect through 15
resistor and switching diode to laser

diode anode.

Monitor Diode Input. Connect this pin to the anode of the monitor diode. Leave unconnected for open-

loop operation. Minimize capacitance on this pin.

Maximum Bias Current Set. A resistor connected from this pin to ground sets the maximum bias

current. The bias current cannot exceed this level. The APC loop controls the bias current up to the

level of the BIASMAX. For APC open-loop operation, this pin sets the laser bias current.

Modulation Current Set. A resistor connected from this pin to ground sets the desired modulation current.

Average Power Control Set. A resistor connected from this pin to ground sets the desired average

optical power. Connect a 50k
resistor to ground for APC open-loop operation.

Exposed Pad. Ground. This pad must be soldered to ground.

8 _______________________________________________________________________________________

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