The AD5781 is a 18-bit, ±0.5 LSB INL, ±0.5 LSB DNL true voltage output DAC with extremely low noise and drift. It is well suited for applications such as measurement and control, life sciences and aerospace, data acquisition systems and more.
The AD5781 is a single‑chip, 18‑bit, unbuffered voltage‑output DAC that operates from a bipolar supply of up to ±16.5 V. It offers true 18‑bit accuracy (±0.5 LSB INL/DNL), low noise (7.5 nV/√Hz), and fast settling (1 µs for a 10 V step). The device includes a power‑on reset circuit that places the output in a defined state until programmed.
Typical applications include medical instrumentation, test and measurement, industrial control, and aerospace systems. The DAC can be configured with various output‑amplifier settings (unity‑gain, gain‑of‑two, bias‑compensation) and supports standard SPI‑compatible serial interfaces up to 35 MHz.
| Resolution | 18 Bits |
|---|---|
| Supply Voltage Range | ±16.5 V |
| Operating Temperature | −40 °C to +125 °C |
| Noise Spectral Density | 7.5 nV/√Hz |
| Settling Time | 1 µs (10 V step) |
| DC Output Impedance (Normal Mode) | 3.4 kΩ |
| Maximum Serial Clock Rate | 35 MHz |
The AD5781 provides 18‑bit resolution.
The device can operate with a serial clock up to 35 MHz.