AD667

a FEATURES Complete 12-Bit D/A Function Double-Buffered Latch On Chip Output Amplifier High Stability Buried Zener Reference Single Chip Construction Monotonicity Guaranteed Over Temperature Linearity Guaranteed Over Temperature: 1/2 LSB max Settling Time: 3 ␮ s max to 0.01% Guaranteed for Operation with ؎12 V or ؎15 V Supplies Low Power: 300 mW Including Reference TTL/5 V CMOS Compatible Logic Inputs Low Logic Input Currents MIL-STD-883 Compliant Versions Available PRODUCT DESCRIPTION Microprocessor-Compatible 12-Bit D/A Converter AD667* FUNCTIONAL BLOCK DIAGRAM The AD667 is a complete voltage output 12-bit digital-to-analog converter including a high stability buried Zener voltage reference and double-buffered input latch on a single chip. The converter uses 12 precision high speed bipolar current steering switches and a laser trimmed thin-film resistor network to provide fast settling time and high accuracy. Microprocessor compatibility is achieved by the on-chip doublebuffered latch. The design of the input latch allows direct interface to 4-, 8-, 12-, or 16-bit buses. The 12 bits of data from the first rank of latches can then be transferred to the second rank, avoiding generation of spurious analog output values. The latch responds to strobe pulses as short as 100 ns, allowing use with the fastest available microprocessors. The functional completeness and high performance in the AD667 results from a combination of advanced switch design, high speed bipolar manufacturi...