DAC811KU | Texas Instruments

Digital-to-Analog Converter, DAC811KU, Texas Instruments

The DAC811KU is a complete, single-chip integrated-circuit, microprocessor-compatible, 12-bit digital-to-analog converter. The chip combines a precision voltage reference, microcomputer interface logic, and double-buffered latch, in a 12-bit D/A converter with a voltage output amplifier. Fast current switches and a laser-trimmed thin-film resistor network provide a highly accurate and fast D/A converter. Microcomputer interfacing is facilitated by a double-buffered latch. The input latch is divided into three 4-bit nibbles to permit interfacing to 4-, 8-, 12-, or 16-bit buses and to handle right-or left-justified data.

The 12-bit data in the input latches is transferred to the D/A latch to hold the output value. Input gating logic is designed so that loading the last nibble or byte of data can be accomplished simultaneously with the transfer of data (previously stored in adjacent latches) from adjacent input latches to the D/A latch. This feature avoids spurious analog output values while using an interface technique that saves computer instructions. The DAC811KU is laser trimmed at the wafer level and is specified to ±1/4LSB maximum linearity error (B, K, and S grades) at 25°C and °1/2LSB maximum over the temperature range.

Features

• Single integrated circuit chip
• Microcomputer interface: double-buffered latch
• Monotonicity guaranteed over temperature