AS3372E

The ALFA AS3372E is a general purpose signal processing device for audio tone sources. PDIP-24. Included on-chip are a two channel voltage controlled input mixer, a dedicated 4-pole low pass voltage controlled filter with voltage controllable resonance, universal mixing/panning VCA-block and a quality final voltage controlled amplifier. With the exception of the filter cut-off frequency, (the filter frequency control voltage ranges from - 150mV to +100mV) all control inputs are very low bias current, high impedance inputs which range from 0 to + 5 volts. This feature allows the common DAC output voltage in a microprocessor system to be multiplexed to these inputs with only a CMOS analog multiplexer and hold capacitors, thus eliminating the usual Sample & Hold buffers.