AD5791 Datasheet

• 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
• 1μs settling time
• 1.4 nV-sec glitch impulse
• Operating 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

• Medical instrumentation
• Test and measurement
• Industrial control
• High end scientific and aerospace instrumentation

The AD5791 is 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 V_DD – 2.5 V and a negative reference input in the range V_SS + 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 Highlights

1. 1 ppm Accuracy.
2. Wide Power Supply Range up to ±16.5 V.
3. Operating Temperature Range: −40°C to +125°C.
4. Low 7.5 nV/√Hz Noise Spectral Density.
5. Low 0.05 ppm/°C Temperature Drift.