DESCRIPTION

The SA578 is a unity gain level programmable compandor designed for low power applications. The SA578 is internally configured as an expandor and a compressor to minimize external component count. The summing amplifiers of the SA578 have 600? drive capability and the inverting input of the compressor amplifier is accessible through Pin 9 for summing multiple external signals. Power Down/Mute function is active low and requires an open collector output logic configuration at Pin 8. If Power Down/Mute is not needed, Pin 8 should be left open. When the part is muted, supply current drops to 170mA at 3.6V.

FEATURES

? Operating voltage range: 1.8V to 7V

? Low power consumption (1.4mA @ 3.6V)

? 0dB level programmable (10mVRMS to 1.0VRMS)

? Over 90dB of dynamic range

? Wide input/output swing capability

? Low external component count

? SA578 meets cellular radio specifications

? ESD hardened

? Power Down mode (ICC = 170μA @ 3.6V)

? Mute function

? Multiple external summing capability

? 600? drive capability

APPLICATIONS

? High performance portable communications

? Cellular radio

? Cordless telephone

? Consumer audio

? Wireless microphones

? Modems

? Electric organs

? Hearing aids

? Automatic level control (ALC)