MAX3996 Ver la hoja de datos (PDF) - Maxim Integrated

Número de pieza

componentes Descripción

Fabricante

MAX3996

3.0V to 5.5V, 2.5Gbps VCSEL and Laser Driver

Maxim Integrated 

3.0V to 5.5V, 2.5Gbps VCSEL

and Laser Driver

Pin Description

PIN

1

2

3, 9

4

5

6, 16, 19

7

8

10

11

12

13

14

15

17

18

20

EP

NAME

TC

FAULT

GND

TX_DISABLE

PORDLY

VCC

IN+

IN-

MON1

MON2

COMP

MD

SHDNDRV

BIAS

OUT+

OUT-

MODSET

Exposed Pad

FUNCTION

Temperature Compensation Set. The resistor at TC programs the temperature-increasing component

of the laser-modulation current.

Fault Indicator. See Table 1.

Ground

Transmit Disable. Laser output is disabled when TX_DISABLE is high or left unconnected. The laser

output is enabled when this pin is asserted low.

Power-On Reset Delay. A capacitor connected between PORDLY and GND can be used to extend the

delay for the power-on reset circuit. See the Design Procedure section.

Supply Voltage

Noninverting Data Input

Inverting Data Input

Attaches to the emitter of the bias driving transistor through a 10Ω resistor. See the Design Procedure

section.

This pin attaches to the emitter of the bias driving transistor. See the Design Procedure section.

A capacitor connected from this pin to ground sets the dominant pole of the APC loop. See the Design

Procedure section.

Monitor Diode Connection. MD is used for automatic power control.

Shutdown Driver Output. Provides a redundant laser shutdown.

Laser Bias Current Output

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

Negative Modulation-Current Output. Current flows to this pin when input data is high.

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

Ground. This must be soldered to the circuit board ground for proper thermal and electrical

performance. See the Layout Considerations section.

6 _______________________________________________________________________________________

Share Link: