PRODUCT DESCRIPTION

The AD674B and AD774B are complete 12-bit successive approximation analog-to-digital converters with three-state output buffer circuitry for direct interface to 8- and 16-bit microprocessor busses. A high-precision voltage reference and clock are included on chip, and the circuit requires only power supplies and control signals for operation. The AD674B and AD774B are pin-compatible with the industry standard AD574A, but offer faster conversion time and bus access speed than the AD574A and lower power consumption. The AD674B converts in 15 μs (maximum) and the AD774B converts in 8 μs (maximum).

FEATURES

Complete Monolithic 12-Bit A/D Converters with Reference, Clock, and Three-State Output Buffers

Industry Standard Pinout

High Speed Upgrades for AD574A

8- and 16-Bit Microprocessor Interface

8 s (Max) Conversion Time (AD774B)

15 s (Max) Conversion Time (AD674B)

5 V, 10 V, 0 V–10 V, 0 V–20 V Input Ranges

Commercial, Industrial, and Military Temperature Range Grades

MIL-STD-883-Compliant Versions Available