The ADC0801 ADC0802 ADC0803 ADC0804 and ADC0805 are CMOS 8-bit successive approximation A D converters that use a differential potentiometric ladder similar to the 256R products These converters are designed to allow operation with the NSC800 and INS8080A derivative control bus with TRI-STATE output latches directly driving the data bus These A Ds appear like memory locations or I O ports to the microprocessor and no interfacing logic is needed Differential analog voltage inputs allow increasing the common-mode rejection and offsetting the analog zero input voltage value In addition the voltage reference input can be adjusted to allow encoding any smaller analog voltage span to the full 8 bits of resolution