MAX3273(2002) Просмотр технического описания (PDF) - Maxim Integrated

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Компоненты Описание

производитель

MAX3273
(Rev.:2002)

+3.3V, 2.5Gbps Low-Power Laser Driver

Maxim Integrated 

+3.3V, 2.5Gbps Low-Power Laser Driver

PIN

1, 4, 13, 15, 18

2

3

5

6

7, 9, 12

8

10

11

14

16

17

19

20

21

22

23

24

EP

Pin Description

NAME

VCC

DATA+

DATA-

CLK+

CLK-

GND

LATCH

EN

MODSET

BIAS

OUT+

OUT-

MD

APCFILT1

APCFILT2

FAIL

APCSET

BIASMAX

EXPOSED

PAD

FUNCTION

Power-Supply Voltage

Noninverting Data Input, with On-Chip Biasing

Inverting Data Input, with On-Chip Biasing

Noninverting Clock Input for Data Retiming, with On-Chip Biasing

Inverting Clock Input for Data Retiming, with On-Chip Biasing

Ground

Data Retiming Enable Input, Active-High. Retiming disabled when floating or pulled low.

TTL/CMOS Enable Input. Low for normal operation. Float or pull high to disable laser bias and

modulation currents. Internal 100kΩ pullup to VCC.

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

Laser Bias Current Output. Connect to the laser through an inductor.

Positive Modulation-Current Output. IMOD flows into this pin when input data is high.

Negative Modulation-Current Output. Current flows into this pin when input data is low. Connect

to load equivalent to that on OUT+ to maintain differential output balance.

Monitor Diode Input. Connect this pin to the anode of the monitor diode. Leave floating for

open-loop operation.

A capacitor between APCFILT1 and APCFILT2 sets the dominant pole of the APC feedback

loop (CAPCFILT = 0.01µF). Ground APCFILT1 for open-loop operation.

See above.

TTL/CMOS Failure Output, Active-Low. Indicates APC failure when low.

A resistor connected from this pin to ground sets the desired average optical power. Connect a

100kΩ resistor to GND for open-loop operation.

A resistor connected from this pin to ground sets the maximum bias current. The APC function

can subtract current from this maximum value, but cannot add to it. For open-loop operation,

this pin sets the laser bias current.

Ground. Solder this pad to ground.

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