DAC7800

DAC7800 DAC7801 DAC7802 SBAS005B – JANUARY 1990 – REVISED FEBRUARY 2004 Dual Monolithic CMOS 12-Bit Multiplying DIGITAL-TO-ANALOG CONVERTERS FEATURES q TWO DACs IN A 0.3" WIDE PACKAGE q SINGLE +5V SUPPLY q HIGH-SPEED DIGITAL INTERFACE: Serial—DAC7800 8 + 4-Bit Parallel—DAC7801 12-Bit Parallel—DAC7802 q MONOTONIC OVER TEMPERATURE q LOW CROSSTALK: –94dB min q FULLY SPECIFIED OVER –40OC TO +85OC DESCRIPTION The DAC7800, DAC7801 and DAC7802 are members of a new family of monolithic dual 12-bit CMOS multiplying Digital-to-Analog Converters (DACs). The digital interface speed and the AC multiplying performance are achieved by using an advanced CMOS process optimized for data conversion circuits. High stability on-chip resistors provide true 12-bit integral and differential linearity over the wide industrial temperature range of –40°C to +85°C. The DAC7800 features a serial interface capable of clockingin data at a rate of at least 10MHz. Serial data is clocked (edge triggered) MSB first into a 24-bit shift register and then latched into each DAC separately or simultaneously as required by the application. An asynchronous CLEAR control is provided for power-on reset or system calibration functions. It is packaged in a 16-pin 0.3" wide plastic DIP. The DAC7801 has a 2-byte (8 + 4) double-buffered interface. Data is first loaded (level transferred) into the input registers in two steps for each DAC. Then both DACs are updated simultaneously. The DAC7801 features an asynchronous CLEAR...