Highly accurate 20-bit DAC

14 April 2010 Analogue, Mixed Signal, LSI

Analog Devices’ AD5791 is a 20-bit digital-to-analog converter (DAC) featuring 1 ppm (parts per million) resolution and accuracy. With its low noise (sub 1 ppm), fast refresh rates (1 μs) and low output drift (sub 1 ppm), the device enables precise control of the magnetic gradient in high-field-strength MRI (magnetic resonance imaging) applications, and results in enhanced image resolution and contrast. Other applications include test and measurement systems, high-end scientific and aerospace instrumentation, communications equipment and industrial control systems. The AD5791 offers a relative accuracy specification of ±1 LSB max, and operation is guaranteed monotonic with a ±1 LSB DNL max specification. The output can be configured for standard unipolar (+5 V, +10 V) or bipolar (±5 V, ±10 V) output ranges.

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