Rainbow-electronics MAX2656 User Manual download pdf

General Description

The MAX2654/MAX2655/MAX2656 high third-order

intercept point (IP3), low-noise amplifiers (LNAs) are

designed for applications in GPS, PCS, WLL, and satel-

lite phone systems. The MAX2654/MAX2655/MAX2656

incorporate on-chip internal output matching to 50Ω,

eliminating the need for external matching components.

A shutdown feature in the MAX2654/MAX2655 reduces

the operating current to 0.1µA, eliminating the need for

an external supply switch.

The MAX2654 operates in the GPS frequency of

1575MHz with 15.1dB of gain, 1.5dB noise figure, and

only consumes 5.8mA. The MAX2655 is designed with

high-input IP3 to improve operation in cellular applica-

tions where the cellular power amplifier leaks into the

GPS receiver. The MAX2656 is designed for PCS

phone applications with 13.5dB of gain in high-gain

mode and 0.8dB of gain in low-gain mode (selected by

a logic control) and 1.9dB noise figure.

The IP3 of MAX2655/MAX2656 is adjustable by a single

external bias resistor (R

BIAS

), allowing supply current to

be optimized for a specific application.

The MAX2654/MAX2655/MAX2656 operate from a

+2.7V to +5.5V single supply and are available in the

miniature 6-pin SC70 package.

________________________Applications

GPS Receivers

GPS Receivers in Cellular Phones

DCS/PCS Cellular Phones

Satellite Phones

Wireless Local Loop

Features

♦ Low Noise Figure

MAX2654: 1.5dB at 1575MHz

MAX2655: 1.45dB at 1575MHz

MAX2656: 1.9dB at 1960MHz

♦ High Gain

MAX2654: 15.1dB at 1575MHz

MAX2655: 14.1dB at 1575MHz

MAX2656: 13.5dB at 1960MHz

♦ 12.7dB Gain Step (MAX2656 only)

♦ Integrated 50Ω Output Matching

♦ Variable IP3 Set by One Bias Resistor

(MAX2655/MAX2656 only)

♦ 0.1µA Shutdown Mode (MAX2654/MAX2655 only)

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

♦ Ultra-Small 6-Pin SC70 Package

MAX2654/MAX2655/MAX2656

1575MHz/1900MHz Variable-IP3

Low-Noise Amplifiers

________________________________________________________________ Maxim Integrated Products 1

MAX2654

MAX2655

MAX2654

SC70-6

RFOUT

ARE FOR MAX2654 ONLY

GND

RFIN

BIAS (GND)

Pin Configuration

MAX2655

MAX2656

10kΩ

(1)

BIAS

CTRL

/GND

= +3V

RFOUT

RFIN

BIAS

( ) ARE FOR MAX2654 ONLY

Typical Operating Circuit

19-1872; Rev 1; 4/02

EVALUATION KIT

AVAILABLE

Ordering Information

PART

TEMP

RANGE

PIN-

PACKAGE

SOT

TOP-

MARK

MAX2654EXT-T -40°C to +85°C

6 SC70-6

AAI

MAX2655EXT-T -40°C to +85°C

6 SC70-6

AAJ

MAX2656EXT-T -40°C to +95°C

6 SC70-6

AAK

PART FREQUENCY L1 (nH) C1 (pF) C2 (pF)

MAX2654 1575 5.6 6 1.6

MAX2655 1575 5.6 1800 1.5

MAX2656 1960 4.7 1800 1.2

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.

1 2 3 4 5 6 ... 13 14

Summary of Contents

Page 1 - Low-Noise Amplifiers

General DescriptionThe MAX2654/MAX2655/MAX2656 high third-orderintercept point (IP3), low-noise amplifiers (LNAs) aredesigned for applications in GPS,

Page 2

MAX2654/MAX2655/MAX26561575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers10 ___________________________________________________________________________

Page 3

MAX2654/MAX2655/MAX26561575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers______________________________________________________________________________

Page 4

MAX2654/MAX2655/MAX26561575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers12 ___________________________________________________________________________

Page 5

MAX2654/MAX2655/MAX26561575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers______________________________________________________________________________

Page 6

MAX2654/MAX2655/MAX26561575MHz/1900MHz Variable-IP3 Low-Noise AmplifiersMaxim cannot assume responsibility for use of any circuitry other than circuit

Page 7

MAX2654/MAX2655/MAX26561575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers2 ____________________________________________________________________________

Page 8

MAX2654/MAX2655/MAX26561575MHz/1900MHz Variable-IP3 Low-Noise AmplifiersAC ELECTRICAL CHARACTERISTICS (MAX2654)(MAX2654 Evaluation Kit, VCC= +3.0V, PI

Page 9

MAX2654/MAX2655/MAX26561575MHz/1900MHz Variable-IP3 Low-Noise AmplifiersAC ELECTRICAL CHARACTERISTICS (MAX2656)(MAX2656 Evaluation Kit, VCC= +3V, PIN=

Page 10

MAX2654/MAX2655/MAX26561575MHz/1900MHz Variable-IP3 Low-Noise AmplifiersTypical Operating Characteristics(PIN= -30dBm, input and output are terminated

Page 11

MAX2654/MAX2655/MAX26561575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers-10-8-6-4-201000 1200 1400 1600 1800 2000MAX2654INPUT/OUTPUT RETURN LOSS vs. F

Page 12

MAX2654/MAX2655/MAX26561575MHz/1900MHz Variable-IP3 Low-Noise AmplifiersMAX2655INPUT IP3 vs. RBIASMAX2655 toc23-10-4-6-80-2684210INPUT IP3 (dBm)200 60

Page 13

MAX2654/MAX2655/MAX26561575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers8 ____________________________________________________________________________

Page 14

MAX2654/MAX2655/MAX26561575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers______________________________________________________________________________

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