ADC0802

ADC0802, ADC0803 ADC0804 August 1997 8-Bit, MicroprocessorCompatible, A/D Converters Description The ADC0802 family are CMOS 8-Bit, successive-approximation A/D converters which use a modified potentiometric ladder and are designed to operate with the 8080A control bus via three-state outputs. These converters appear to the processor as memory locations or I/O ports, and hence no interfacing logic is required. The differential analog voltage input has good commonmode-rejection and permits offsetting the analog zero-inputvoltage 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. Features 80C48 and 80C80/85 Bus Compatible - No Interfacing Logic Required Conversion Time < 100µs Easy Interface to Most Microprocessors Will Operate in a “Stand Alone” Mode Differential Analog Voltage Inputs Works with Bandgap Voltage References TTL Compatible Inputs and Outputs On-Chip Clock Generator 0V to 5V Analog Voltage Input Range (Single + 5V Supply) No Zero-Adjust Required Ordering Information PART NUMBER ADC0802LCN ADC0802LCD ADC0802LD ADC0803LCN ADC0803LCD ADC0803LCWM ADC0803LD ADC0804LCN ADC0804LCD ADC0804LCWM ERROR ±1/2 LSB ±3/4 LSB ±1 LSB ±1/2 LSB ±3/4 LSB ±1 LSB ±1 LSB ±1 LSB ±1 LSB ±1 LSB EXTERNAL CONDITIONS VREF/2 = 2.500VDC (No Adjustments) TEMP. RANGE (oC) 0 to 70 -40 to 85 -55 to 125 PACKAGE 20 Ld PDIP 20 Ld CERDIP 20 Ld CERDIP 20 Ld PDIP 20 Ld CERDIP 20 Ld SOI...