AD590 is a 2-terminal integrated circuit temperature transducer that produces an output current proportional to absolute temperature. It features linear current output, wide temperature range, 2-terminal device, and high calibration accuracy.
The AD590 is a 2‑terminal integrated‑circuit temperature transducer that produces a current proportional to absolute temperature. It operates from a supply voltage of 4 V to 30 V and outputs a nominal 1 µA per kelvin (≈298.2 pA at 25 °C). The device is laser‑trimmed for ±0.5 °C calibration accuracy and offers excellent linearity, high output impedance, and low power consumption, making it suitable for remote sensing and multiplexed applications.
The datasheet lists detailed specifications for the AD590J/K and AD590L/M variants, including operating voltage range, current output, temperature coefficient, calibration error, non‑linearity, power‑supply rejection, case isolation, and absolute maximum ratings. It also provides circuit diagrams, calibration procedures, and thermal‑environment considerations for accurate temperature measurement.
| Calibration Error @ 25 °C | +5.0 °C / +2.5 °C (typical) |
|---|---|
| Nonlinearity (TO‑52, Flatpack) | ±0.8 °C |
| Reverse Bias Leakage Current (10 V) | 10 pA |
The AD590 provides a linear output of 1 µA per kelvin (≈298.2 pA at 25 °C).
A forward voltage of up to 44 V may cause permanent damage.
The AD590 is rated for temperatures from –55 °C to +150 °C.