02011-DSH-001-C

Mindspeed Technologies

®

7

Preliminary Information/Mindspeed Proprietary and Confidential

3.0 Functional Description

3.1

Overview

The M02011 is a CMOS transimpedance amplifier with AGC. The AGC gives a wide dynamic range of 40 dB. The

high transimpedance gain of 66 k

Ω ensures good sensitivity.

For optimum system performance, the M02011 die should be mounted with a GaAs or InGaAs PIN photodetector

inside a lensed TO-Can or other optical sub-assembly.

The M02011 can either bias the PIN diode from the internal regulator, or use an externally biased PIN diode.

A replica of the average photodiode current is available at the MON pad for photo-alignment and 'Loss of Signal'

(LOS) monitoring.

Figure 3-1.

M02011 Block Diagram

DC

Restore

Phase

Splitter

AGC

PINA

PINK

MON

DOUT

DOUT

2.6 V

1 V

DC Shift