GENERAL DESCRIPTION

The AD7819 is a high speed, microprocessor-compatible, 8-bit analog-to-digital converter with a maximum throughput of 200 kSPS. The converter operates off a single 2.7 V to 5.5 V supply and contains a 4.5 µs successive approximation A/D converter, track/hold circuitry, on-chip clock oscillator and 8-bit wide parallel interface. The parallel interface is designed to allow easy interfacing to microprocessors and DSPs. Using only address decoding logic the AD7819 is easily mapped into the microprocessor address space.

FEATURES

8-Bit ADC with 4.5 μs Conversion Time

On-Chip Track and Hold

Operating Supply Range: 2.7 V to 5.5 V

Specifications at 2.7 V – 3.6 V and 5 V ±10

8-Bit Parallel Interface 8-Bit Read

Power Performance

Normal Operation 10.5 mW, VDD = 3 V

Automatic Power-Down 57.75 μW @ 1 kSPS, VDD = 3 V

Analog Input Range: 0 V to VREF

Reference Input Range: 1.2 V to VDD