ADN2872(RevB) Просмотр технического описания (PDF) - Analog Devices

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ADN2872
(Rev.:RevB)

3.3 V Dual-Loop, 50 Mbps to 3.3 Gbps Laser Diode Driver

Analog Devices 

ADN2872

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

PIN 1

INDICATOR

CCBIAS 1

PAVSET 2

GND 3

VCC 4

PAVREF 5

RPAV 6

ADN2872

TOP VIEW

(Not to Scale)

18 FAIL

17 IBMON

16 VCC

15 ERREF

14 IMMON

13 ERSET

Data Sheet

NOTES

1. THE LFCSP PACKAGE HAS AN EXPOSED PADDLE

THAT MUST BE CONNECTED TO GROUND.

Figure 5. Pin Configuration

Table 4. Pin Function Descriptions

Pin No. Mnemonic

1

CCBIAS

2

PAVSET

3

GND

4

VCC

5

PAVREF

6

RPAV

7

ERCAP

8

PAVCAP

9

GND

10

DATAP

11

DATAN

12

ALS

13

ERSET

14

IMMON

15

ERREF

16

VCC

17

IBMON

18

FAIL

19

GND

20

VCC

21

IMODP

22

IMODN

23

GND

24

IBIAS

EPAD

Description

Control Output Current.

Average Optical Power Set Pin.

Supply Ground.

Supply Voltage.

Reference Voltage Input for Average Optical Power Control.

Average Power Resistor When Using PAVREF.

Extinction Ratio Loop Capacitor.

Average Power Loop Capacitor.

Supply Ground.

Data, Positive Differential Input.

Data, Negative Differential Input.

Automatic Laser Shutdown.

Extinction Ratio Set Pin.

Modulation Current Monitor Current Source.

Reference Voltage Input for Extinction Ratio Control.

Supply Voltage.

Bias Current Monitor Current Source.

FAIL Alarm Output.

Supply Ground.

Supply Voltage.

Modulation Current Positive Output (Current Sink), Connect to Laser Diode.

Modulation Current Negative Output (Current Sink).

Supply Ground.

Laser Diode Bias (Current Sink to Ground).

Exposed Pad. The LFCSP package has an exposed pad that must connect to ground.

Rev. B | Page 6 of 20

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