ADC0803

INTEGRATED CIRCUITS ADC0803/0804 CMOS 8-bit A/D converters Product data Supersedes data of 2001 Aug 03 2002 Oct 17 Philips Semiconductors Philips Semiconductors Product data CMOS 8-bit A/D converters ADC0803/0804 DESCRIPTION The ADC0803 family is a series of three CMOS 8-bit successive approximation A/D converters using a resistive ladder and capacitive array together with an auto-zero comparator. These converters are designed to operate with microprocessor-controlled buses using a minimum of external circuitry. The 3-State output data lines can be connected directly to the data bus. The differential analog voltage input allows for increased common-mode rejection and provides a means to adjust the zero-scale offset. Additionally, the voltage reference input provides a means of encoding small analog voltages to the full 8 bits of resolution. PIN CONFIGURATION D, N PACKAGES CS 1 RD 2 WR 3 CLK IN 4 20 VCC 19 CLK R 18 D0 17 D1 16 D2 15 D3 14 D4 13 D5 12 D6 11 D7 TOP VIEW INTR 5 VIN(+) 6 VIN(–) 7 A GND 8 FEATURES VREF/2 9 D GND 10 Compatible with most microprocessors Differential inputs 3-State outputs Logic levels TTL and MOS compatible Can be used with internal or external clock Analog input range 0 V to VCC Single 5 V supply Guaranteed specification with 1 MHz clock SL00016 Figure 1. Pin configuration APPLICATIONS Transducer-to-microprocessor interface Digital thermometer Digitally-controlled thermostat Microprocessor-based monitoring and...