General Description

The MAX3275/MAX3277 transimpedance amplifiers

provide a compact low-power solution for communica-

tion up to 2.125Gbps. They feature 300nA input-

referred noise at 2.1GHz bandwidth (BW) with 0.85pF

input overload.

The MAX3277 is identical to the MAX3275, but with the

output polarities inverted for optimum packaging flexi-

bility. Both parts operate from a single 3.3V supply and

consume only 83mW. The MAX3275/MAX3277 are

compact 24mil x 47mil die and require no external com-

pensation capacitor. A space-saving filter connection is

provided for positive bias to the photodiode through an

on-chip 600

easy assembly into a TO-46 or TO-56 header with a

photodiode.

The MAX3275/MAX3277 and MAX3274 limiting ampli-

fiers provide a two-chip solution for dual-rate, fibre

channel receiver applications.

Applications

Dual-Rate Fibre Channel Optical Receivers

Gigabit Ethernet Optical Receivers

Features

o Up to 2.125Gbps (NRZ) Data Rates

Input Current

Bandwidth

o 25mA Supply Current at +3.3V

o 2.3GHz Small-Signal Bandwidth

o Die Size: 24mil x 47mil

Low-Noise, Fibre Channel Transimpedance

Amplifiers

________________________________________________________________ Maxim Integrated Products

1

+3.3V

HOST SERVER

OR SWITCH

SMALL FORM FACTOR

OPTICAL RECEIVER

DESERIALIZER

MAX3274

IN+

IN-

TH SQUELCH

BWSEL

RATE SELECT

LOS

LIMITING

AMP

OUT+

100

Ω

600

Ω

660

Ω

100

Ω

4.7k

Ω

TO

10k

Ω

0.1

µF

0.1

µF

0.1

µF

0.1

µF

OUT-

LOS

+3.3V

MAX3275

IN

GND

TIA

OUT+

OUT-

400pF

400pF

Typical Application Circuit

19-2207; Rev 1; 3/05

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.

*Dice are guaranteed to operate from 0°C to +85°C, but are test-

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

MAX3275U/D

0°C to +85°C

Dice*

MAX3277U/D

0°C to +85°C

Dice*