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

For small orders, phone 1-800-835-8769.

General Description

The MAX2640/MAX2641 are low-cost, ultra-low-noise

amplifiers designed for applications in the cellular, PCS,

GPS, and 2.4GHz ISM frequency bands. Operating from

a single +2.7V to +5.5V supply, these devices consume

only 3.5mA of current while providing a low noise fig-

ure, high gain, high input IP3, and an operating fre-

quency range that extends from 400MHz to 2500MHz.

The MAX2640 is optimized for 400MHz to 1500MHz

applications, with a typical performance of 15.1dB gain,

input IP3 of -10dBm, and a noise figure of 0.9dB at

900MHz. The MAX2641 is optimized for 1400MHz to

2500MHz applications, with a typical performance of

14.4dB gain, an input IP3 of -4dBm, and a noise figure

of 1.3dB at 1900MHz.

These devices are internally biased, eliminating the

need for external bias resistors and chokes. In a typical

application, the only external components needed are a

two-element input match, input and output blocking

The MAX2640/MAX2641 are designed on a high-fre-

quency, low-noise, advanced silicon-germanium

process and are offered in the space-saving 6-pin

SOT23 package.

Applications

400MHz/900MHz/2.4GHz ISM Radios

Cellular/PCS Handsets

GPS Receivers

Cordless Phones

Wireless LANs

Wireless Data

Features

o Wide Operating Frequency Range

MAX2640: 400MHz to 1500MHz

MAX2641: 1400MHz to 2500MHz

o Low Noise Figure

MAX2640: 0.9dB at 900MHz

MAX2641: 1.2dB at 1575MHz

1.3dB at 1900MHz

1.5dB at 2450MHz

o High Gain

MAX2640: 15.1dB at 900MHz

MAX2641: 15.7dB at 1575MHz

14.4dB at 1900MHz

13.5dB at 2450MHz

o High Reverse Isolation

MAX2640: 40dB at 900MHz

MAX2641: 31dB at 1575MHz

30dB at 1900MHz

24dB at 2450MHz

o +2.7V to +5.5V Single-Supply Operation

o Low 3.5mA Supply Current

o Ultra-Small SOT23-6 Package

400MHz to 2500MHz SiGe

Ultra-Low-Noise Amplifiers

________________________________________________________________

Maxim Integrated Products

1

C3

C4

Z1

RFIN

C1

RFIN

C2

BIAS GENERATOR

GND

LNA

RF OUT

RF OUT

MAX2640/1

*The series inductor Z1 can be replaced by a transmission line of appropriate impedance

and electrical length.

FREQUENCY (MHz)

C1

VALUE

(pF)

C2

VALUE

(pF)

C3

VALUE

(pF)

C4

VALUE

(pF)

Z1*

VALUE

(nH)

ZM1

VALUE

(pF)

ZM2

VALUE

MAX2640 MAX2641

900

—

—

—

—

1575

1900

2450

470

100

470

470

3

100

100

100

470

470

470

470

—

—

—

100

9.85

5.6

2.55

1.65

2

1

1

1

—

6.8nH

1pF

1pF

Typical Operating Circuits

19-1384; Rev 1; 2/99

PART

MAX2640EUT-T

MAX2641EUT-T

-40°C to +85°C

-40°C to +85°C

TEMP.

RANGE

PIN-

PACKAGE

6 SOT23-6

6 SOT23-6

EVALUATION

KIT

FOLLOWS

DATA

SHEET

Ordering Information

SOT

TOP MARK

AAAV

AAAW

Pin Configuration appears at end of data sheet.