AD5780

09649-001 Data Sheet System Ready, 18-Bit ±1 LSB INL, Voltage Output DAC AD5780 FEATURES True 18-bit voltage output DAC, ±1 LSB INL 8 nV/√Hz output noise spectral density 0.025 LSB long-term linearity error stability ±0.018 ppm/°C gain error temperature coefficient 2.5 µs output voltage settling time 3.5 nV-sec midscale glitch impulse Integrated precision reference buffers Operating temperature range: −40°C to +125°C 4 mm × 5 mm LFCSP package Wide power supply range of up to ±16.5 V 35 MHz Schmitt triggered digital interface 1.8 V-compatible digital interface APPLICATIONS Medical instrumentation Test and measurement Industrial control Scientific and aerospace instrumentation Data acquisition systems Digital gain and offset adjustment Power supply control GENERAL DESCRIPTION The AD57801 is a true 18-bit, unbuffered voltage output digitalto-analog converter (DAC) that operates from a bipolar supply of up to 33 V. The AD5780 accepts a positive reference input range of 5 V to VDD − 2.5 V and a negative reference input range of VSS + 2.5 V to 0 V. Both reference inputs are buffered on chip and external buffers are not required. The AD5780 offers a relative accuracy specification of ±1 LSB maximum range, and operation is guaranteed monotonic with a ±1 LSB differential nonlinearity (DNL) maximum range specification. The part uses a versatile 3-wire serial interface that operates at clock rates of up to 35 MHz and is compatible with standard serial peripheral interface (SPI), QSPI...