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 600Ω 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
• 600Ω drive capability

APPLICATIONS
• High performance portable communications
• Cellular radio
• Cordless telephone
• Consumer audio
• Wireless microphones
• Modems
• Electric organs
• Hearing aids
• Automatic level control (ALC)