SA578D

RF COMMUNICATIONS PRODUCTS SA578 Unity gain level programmable low power compandor Product specification Replaces data of 1993 December 15 IC17 Data Handbook 1997 Nov 07 Philips Semiconductors Philips Semiconductors Product specification Unity gain level programmable low power compandor SA578 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. PIN CONFIGURATION D Package GCELLIN RECTIN EXPCAP EXPOUT 1 2 3 4 16 15 14 13 12 11 VCC COMPCAP2 COMPIN COMPCAP1 RECTIN GCELLIN VREF 5 IREF GND PWRDN/ MUTE 6 7 8 FEATURES Operating voltage range: 1.8V to 7V Low power consumption (1.4mA @ 3.6V) 0dB level programmable 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 (10mVRMS to 1.0VRMS) 10 CO...