General Description

The MAX3760 is a transimpedance preamplifier for

622Mbps ATM applications. It operates from a single

+5V supply and typically consumes only 100mW

power. The preamplifier converts a small photodiode

current to a differential voltage. A DC cancellation cir-

cuit provides a true differential output swing over a

wide range of input current levels, thus reducing pulse-

width distortion.

6.5k

Ω transimpedance gain and 560MHz bandwidth,

combined with low 73nA input-referred noise, provide

-31.5dBm typical sensitivity in 1300nm receivers. The

circuit accepts a 1mAp-p input current, resulting in a

typical optical overload of -3dBm. The device operates

over an extended temperature range of -40°C to +85°C.

The MAX3760 is internally compensated and requires

few external components. In die form it includes a

space-saving filter connection, which provides positive

bias for the photodiode through a 1k

These features, combined with the die aspect ratio and

dimensioning, allow the MAX3760 to assemble easily

into a TO-style header with a photodiode.

The MAX3760 is designed to be used with either the

MAX3761 or the MAX3762 limiting-amplifier ICs. When

combined with a photodiode, the chipset forms a com-

plete 5V, 622Mbps receiver. The MAX3760 is available

in die form and in an 8-pin SO package.

________________________Applications

622Mbps ATM LAN Optical Receivers

622Mbps WAN Optical Receivers

____________________________Features

o 73nA RMS Input-Referred Noise

o 560MHz Bandwidth

o 1mA Peak Input Current

o 6.5k

Ω Gain

o Operation from -40°C to +85°C

o 100mW Typical Power Consumption

o Single +5V Supply

622Mbps, Low-Noise Transimpedance

Preamplifier for LAN and WAN Optical Receivers

________________________________________________________________

Maxim Integrated Products

1

MAX3760

MAX3761

MAX3762

LIMITING

AMPLIFIER

(FILTER)

OUT+

0.01

µF

0.01

µF

+5V

0.01

µF

100

Ω

(OPTIONAL)

OUT-

GND

COMP*

100pF

( ) INDICATE PINS AVAILABLE ONLY ON THE DIE.

*NOT CONNECTED

1k

INREF

IN

Typical Application Circuit

OUT-

INREF

GND

GND

1

2

8

7

COMP

OUT+

IN

MAX3760

SO

TOP VIEW

3

4

6

5

Pin Configuration

19-4765; Rev 0; 7/98

PART

MAX3760ESA

MAX3760E/D

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE

PIN-PACKAGE

8 SO

Dice*

EVALUATION

KIT

AVAILABLE

Ordering Information

*

Dice are designed to operate over a -40°C to +100°C junction

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

For small orders, phone 408-737-7600 ext. 3468.