The ADC0808, ADC0809 data acquisition component is amonolithic CMOS device with an 8-bit analog-to-digital converter,8-channel multiplexer and microprocessor compatiblecontrol logic. The 8-bit A/D converter uses successive approximationas the conversion technique. The converter featuresa high impedance chopper stabilized comparator, a256R voltage divider with analog switch tree and a successiveapproximation register. The 8-channel multiplexer can directlyaccess any of 8-single-ended analog signals.The device eliminates the need for external zero and full-scaleadjustments. Easy interfacing to microprocessors is providedby the latched and decoded multiplexer address inputs andlatched TTL TRI-STATE outputs.