The AD57911is a single 20-bit, unbuffered voltage-output DAC that operates from a bipolar supply of up to 33 V. The AD5791 accepts a positive reference input in the range 5 V to VDD– 2.5 V and a negative reference input in the range VSS+ 2.5 V to 0 V. The AD5791 offers a relative accuracy specification of ±1 LSB max, and operation is guaranteed monotonic with a ±1 LSB differential nonlinearity (DNL) maximum specification.The device uses a versatile 3-wire serial interface that operates at clock rates up to 35 MHz and that is compatible with standard serial peripheral interface (SPI), QSPI™, MICROWIRE™, and DSP interface standards. The device incorporates a power-on reset circuit that ensures the DAC output powers up to 0 V and in a known output impedance state and remains in this state until a valid write to the device takes place. The device provides an output clamp feature that places the output in a defined load state.Product Highlights1 ppm Accuracy.Wide Power Supply Range up to ±16.5 V.Operating Temperature Range: −40°C to +125°C.Low 7.5 nV/√Hz Noise Spectral Density.Low 0.05 ppm/°C Temperature Drift.ApplicationsMedical instrumentationTest and measurementIndustrial controlHigh end scientific and aerospace instrumentation1Protected by U.S. Patent No. 7,884,747. Other patents pending.