Published:2009/7/24 0:02:00 Author:Jessie | From:SeekIC
This single-chip NE/SA576 circuit operates on voltages from 1.8 V to 7 V, with a power consumption of 1.4 mA at 3.6V. Multiple external signals can be summed in the compandor at pin 9. The gain level can be programmed by the selection of resistors R1, R2, and R3. If the supply is less than 2 V, connect 20-kΩ resistors between Vcc and VREF, and between VREF and ground (so that the IC will turn on with a 1.8-V supply). The power-down/mute function (pin 8) requires an open-collector signal, and is active-low.
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