LG1628BXA Ver la hoja de datos (PDF) - Agere -> LSI Corporation

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LG1628BXA

SONET/SDH 2.488 Gbits/s Transimpedance Amplifier

Agere -> LSI Corporation 

Preliminary Data Sheet

January 1998

LG1628AXA SONET/SDH 2.488 Gbits/s

Transimpedance Amplifier

Die Pad Configuration (continued)

The pad descriptions for the LG1628AXA are given in Table 1.

Table 1. Pad Descriptions

Pad

1

2, 19, 23

3

4

5

6

7

8

9

10

Symbol

IN+

GND1

BYPASS

OP2OUT

OP1OUT

OP1–

OP1+

OP2–

OP2+A

OP2+B

Description

Amplifier input; connect to detector anode, current should enter this node.

Ground.

Connections between these nodes and an external dual op amp form the over-

load control circuitry. See the test circuit in Figure 4 for wiring details.

To operate the amplifier without overload control connect OP2OUT to VSS,

OP1OUT to GND, and leave BYPASS and the remaining op amp connections

open (Figure 5).

11

12

13, 16, 18

14

15

17

20, 21, 22

24

VSS1

VSS2

GND2

OUT–

OUT+

BG

DNC

IN–

Supply voltage; –5.2 Vdc nominal.

Supply voltage; –5.2 Vdc nominal.

Ground.

Inverted data output (produces low-level output for current entering IN+).

Noninverted data output (produces high-level output for current entering IN+).

Connection for external –2.5 Vdc voltage reference (typically use an Si band-

gap).

Do not connect; internal test point or reserved for future use.

Inverting input; must provide ac bypass to ground when using overload control.

Lucent Technologies Inc.

3

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