General Description

The MAX3970 is a compact, low-power transimped-

ance amplifier (TIA) optimized for use in 10Gbps opti-

cal receivers. The TIA provides transimpedance at

600V/A with 50

Ω differential CML outputs. The

MAX3970 has a typical input-referred noise of 1.1µA,

and when coupled with a high-speed photodiode,

achieves -18dBm sensitivity and +2mA input overload.

A received-signal strength indicator (RSSI) simplifies

optical assembly. The circuit operates from a single

3.3V supply over a junction temperature range from 0°C

to +110°C.

Applications

10.3Gbps Ethernet Optical Receivers

OC-192 VSR Optical Receivers

Fibre-Channel Optical Receivers

Features

o 150mW Power Dissipation at 3.3V Supply

o 9GHz Bandwidth

o Received-Signal Strength Indication

Current

o 600V/A Transimpedance

10Gbps, 3.3V Low-Power Transimpedance

Amplifier with RSSI

________________________________________________________________ Maxim Integrated Products

1

Ordering Information

LIMITING

AMPLIFIER

SUPPLY

FILTERING

3.3V

0.01

µF

0.01

µF

RSSI

200pF

FILTER

IN

MAX3970

OUT+

OUT-

3.3V

1.0V

Typical Application Circuit

19-1970; Rev 2; 1/02

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Note: Dice are designed to operate over a 0°C to +110°C junc-

PART

TEMP RANGE

PIN-PACKAGE

MAX3970U/D

0

°C to +85°CDice