SPT5400

SPT5400 13-BIT, OCTAL VOLTAGE-OUTPUT DAC WITH PARALLEL INTERFACE FEATURES Full 13-bit performance without external adjustments Eight DACs in one package Buffered voltage outputs Guaranteed monotonic to 13 bits Unipolar or bipolar output swing to ±4.5 V Output settling time of 7 µs to ±1/2 LSB Double-buffered digital inputs APPLICATIONS Automatic test equipment Flat-panel displays Arbitrary function generators Instrumentation Process control DESCRIPTION The SPT5400 has eight 13-bit voltage output digital-toanalog converters on one chip. It operates from ±5 V power supplies and has maximum voltage output swings of up to ±4.5 V without the addition of external components. Novel circuit topology allows for a guaranteed monotonicity of 13 bits without the need for additional circuitry. The SPT5400 has four separate reference voltage inputs, one for each pair of DACs. Four separate analog ground pins allow for separate offset voltages for each DAC pair. Each DAC can be asynchronously loaded through a common 13-bit bus into a double-buffered set of latches. All logic inputs are TTL/CMOS compatible. The SPT5400 is available in a 44-lead PLCC package over the commercial temperature range of 0 °C to +70 °C. BLOCK DIAGRAM VDD REFAB REFCD REFEF REFGH INPUT LATCH A DAC LATCH A DAC A – + VOUTA AGNDAB INPUT LATCH B DAC LATCH B DAC B – + VOUTB INPUT LATCH C DAC LATCH C DAC C – + VOUTC AGNDCD INPUT LATCH D D12–D0 DATA BUS INPUT LATCH E DAC LATCH ...