The ADR44x series is a family of XFET voltage references offering ultralow noise, high accuracy, and low temperature drift. They are suited for precision data acquisition, medical instrumentation, and industrial process control. The document lists features, applications, pin configurations, and detailed electrical characteristics for each model.
Key specifications include supply voltage ranges of 3 V to 18 V, output voltage grades from 2.048 V to 5.000 V, voltage noise as low as 0.1 p‑p (0.1 Hz‑10 Hz), and a dropout voltage of 500 mV. Absolute maximum ratings, thermal resistance data, and an ordering guide with package options are also provided.
| Supply Voltage Operating Range | 3 V to 18 V |
|---|---|
| Output Voltage (A‑Grade) – ADR440 | 2.048 V |
| Output Voltage (A‑Grade) – ADR445 | 5.000 V |
| Voltage Noise (0.1 Hz‑10 Hz) | 0.1 p‑p |
| Maximum Supply Voltage (Absolute Rating) | 20 V |
| Output Short‑Circuit Duration | Indefinite |
The absolute maximum supply voltage rating is 20 V.
The output short‑circuit duration to ground is indefinite.
The voltage noise is specified as 0.1 p‑p over the 0.1 Hz to 10 Hz range.
The devices operate with a supply voltage from 3 V to 18 V.