The DAC7644 is a 16-bit, quad voltage output digital- to-analog converter with guaranteed 15-bit monotonic performance over the specified temperature range.
The DAC7644 is a 16‑bit, quad‑voltage‑output digital‑to‑analog converter offering 15‑bit monotonic performance over a –40 °C to +85 °C temperature range. It accepts 16‑bit parallel data, features double‑buffered inputs, and includes a read‑back mode for internal registers. The device can be powered from a single +5 V supply or from ±5 V supplies, making it suitable for test equipment, data‑acquisition systems, and closed‑loop servo control.
The datasheet details electrical specifications, absolute maximum ratings, package options, pin assignments, and typical performance curves. It also provides ordering information for the 48‑lead SSOP package and notes on RoHS‑compliant (Green) versions.
| Monotonicity | 14–15 Bits |
|---|---|
| Power Supply Rejection Ratio (PSRR) at Full Scale | 10–100 ppm/V |
| Output Current | -1.25 to +1.25 mA |
| Maximum Load Capacitance (no oscillation) | 500 pF |
| Operating Temperature Range | -40 °C to +85 °C |
The DAC7644 can operate from a single +5 V supply or from ±5 V supplies.
The settling time to within +0.003 % for a 5 V output step is 8–10 µs.
The device can handle up to 500 pF of load capacitance without oscillation.