GENERAL DESCRIPTION:

The AD57911 is a single 20-bit, unbuffered voltage-output digitalto-analog converter (DAC) that operates from a bipolar supply ofup to 33 V. The AD5791 accepts a positive reference input in therange 5 V to VDD − 2.5 V and a negative reference input in therange VSS + 2.5 V to 0 V. The AD5791 offers a relative accuracyspecification of ±1 LSB max, and operation is guaranteedmonotonic with a ±1 LSB differential nonlinearity (DNL)maximum specification.The device uses a versatile 3-wire serial interface that operatesat clock rates up to 35 MHz and that is compatible withstandard serial peripheral interface (SPI), QSPI™,MICROWIRE™, and DSP interface standards. The deviceincorporates a power-on reset circuit that ensures the DAC output powers up to 0 V and in a known output impedancestate and remains in this state until a valid write to the devicetakes place. The device provides an output clamp feature thatplaces the output in a defined load state.

FEATURES:

1 ppm resolution

1 ppm INL

7.5 nV/√Hz noise spectral density

0.19 LSB long-term linearity stability

<0.05 ppm/°C temperature drift

1 µs settling time

1.4 nV-sec glitch impulseOperating temperature range: −40°C to +125°C

20-lead TSSOP package

Wide power supply range 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

High end scientific and aerospace instrumentation