AD9774 is a single supply, oversampling, 14-bit digital-to-analog converter (DAC) optimized for waveform reconstruction applications requiring exceptional dynamic range.
The AD9774 is a single‑supply, oversampling 14‑bit digital‑to‑analog converter optimized for waveform‑reconstruction applications that require high dynamic range. It integrates a low‑distortion DAC, a two‑stage 4× digital interpolation filter and an on‑chip clock multiplier, reducing the complexity of the analog reconstruction filter.
The device offers flexible supply options (3 V or 5 V), differential current outputs configurable for single‑ended or differential topologies, and a full‑scale output current adjustable over a wide range. Detailed electrical specifications, pin descriptions and absolute maximum ratings are provided for designers.
| Resolution | 14 bits |
|---|---|
| Maximum Input Data Rate | 32 MSPS |
| Maximum Output Update Rate | 128 MSPS |
| Full‑Scale Output Current (adjustable range) | 2 mA to 20 mA |
| Output Compliance Range | 1.25 V |
| Operating Temperature Range | -40 °C to +85 °C |
The AD9774 supports input data rates up to 32 MSPS.
The device can operate from a single supply of either 3 V or 5 V, and its analog and digital supplies (AVDD, DVDD, PLLVDD) accept 2.7 V to 5.5 V.
The full‑scale output current can be set between 2 mA and 20 mA.
The output compliance range is nominally 1.25 V.