GENERAL DESCRIPTION

The AD6458 is a 3 V, low power receiver IF subsystem for operation at input frequencies as high as 400 MHz and IFs from 5 MHz up to 50 MHz. It is optimized for operation in GSM, DCS1800 and PCS1900 receivers. It consists of a mixer, IF amplifier, I and Q demodulators, a phase-locked quadrature oscillator, precise AGC subsystem, and a biasing system with external power-down.

FEATURES

Fully Compliant with Standard and Enhanced GSM Specification

–12 dBm Input 1 dB Compression Point

–2 dBm Input Third Order Intercept

10 dB SSB Noise Figure (330 V)

DC–400 MHz RF and LO Bandwidths

Linear IF Amplifier

Linear-in-dB and Stable over Temperature Voltage

Gain Control

Quadrature Demodulator

Onboard Phase-Locked Quadrature Oscillator

Demodulates IFs from 5 MHz to 50 MHz

Low Power

9 mA at Midgain

1 μA Sleep Mode Operation

3.0 V to 3.6 V Operation

Interfaces to AD7013, AD7015 and AD6421 Baseband Converters

20-Lead SSOP