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