ADC0803/0804 CMOS 8-bit A/D converters

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.

FEATURES

• 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 V_CC

• Single 5 V supply

• Guaranteed specification with 1 MHz clock

APPLICATIONS

• Transducer-to-microprocessor interface

• Digital thermometer

• Digitally-controlled thermostat

• Microprocessor-based monitoring and control systems

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

NOTE:

1. Derate above 25 °C, at the following rates: N package at 13.5 mW/°C; D package at 11.1 mW/°C.

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