ADC774

® ADC774 www.DataSheet4U.com Microprocessor-Compatible ANALOG-TO-DIGITAL CONVERTER FEATURES q COMPLETE 12-BIT A/D CONVERTER WITH REFERENCE, CLOCK, AND 8-, 12-, or 16BIT MICROPROCESSOR BUS INTERFACE q ALTERNATE SOURCE FOR HI774 A/D CONVERTER: 8.5µs Conversion Time, 150ns Bus Access Time q FULLY SPECIFIED FOR OPERATION ON ±12V OR ±15V SUPPLIES q NO MISSING CODES OVER TEMPERATURE: 0°C to +75°C: ADC774J, K –55°C to +125°C: ADC774SH, TH formance. It is complete with a self-contained +10V reference, internal clock, digital interface for microprocessor control, and three-state outputs. The reference circuit, containing a buried zener, is lasertrimmed for minimum temperature coefficient. The clock oscillator is current-controlled for excellent stability over temperature. Full-scale and offset errors may be externally trimmed to zero. Internal scaling resistors are provided for the selection of analog input signal ranges of 0V to +10V, 0V to +20V, ±5V, and ±10V. The converter may be externally programmed to provide 8- or 12-bit resolution. The conversion time for 12 bits is factory set for 8.5µs maximum. Output data are available in a parallel format from TTLcompatible three-state output buffers. Output data are coded in straight binary for unipolar input signals and bipolar offset binary for bipolar input signals. The ADC774, available in both industrial and military temperature ranges, requires supply voltages of +5V and ±12V or ±15V. It is packaged in a 28-pin plastic DIP, or a ...