The AD590 is a 2-terminal integrated circuit temperature transducer that produces an output current proportional to absolute temperature.
The AD590 is a two‑terminal integrated‑circuit temperature transducer that provides a current output proportional to absolute temperature (1 µA per Kelvin). It operates from a wide supply range (4 V‑30 V), offers low cost, high linearity and excellent supply‑rejection, making it suitable for remote sensing and multiplexed applications.
The device is specified for an operating temperature range of –55 °C to +150 °C, with absolute maximum ratings of 44 V forward and –20 V reverse. Detailed specifications include nominal current output, temperature coefficient, calibration error, leakage current, noise, and power‑supply rejection. The handbook also covers pin configurations, circuit description, calibration, non‑linearity, and thermal‑environment effects.
| Nominal Current Output @ 25 °C | 298.2 pA |
|---|---|
| Nominal Temperature Coefficient | 1 µA/K |
| Calibration Error @ 25 °C (AD590J/K) | +5.0 °C |
| Reverse Bias Leakage Current (10 V) | 10 pA |
| Current Noise | 40 pA/√Hz |
Power Supply Rejection (AV| 0.5 pA | |
| Effective Shunt Capacitance | 100 pF |
| Electrical Turn‑On Time | 20 µs |
| Absolute Maximum Forward Voltage | 44 V |
| Absolute Maximum Reverse Voltage | -20 V |
The AD590 produces a nominal current of 298.2 pA at 25 °C (298.2 K).
The AD590 is rated for operation from –55 °C to +150 °C.
The device can tolerate a reverse voltage of up to –20 V.