AD590 is an integrated circuit temperature transducer that produces an output current proportional to absolute temperature. It is a high impedance constant current regulator, passing 1μA/oK for supply voltages between +4V and +30V. AD590 can be used in any temperature-sensing application between -55°C to 150°C in which conventional electrical temperature sensors are currently employed. AD590's low cost, monolithic integrated circuit design and elimination of support circuitry make it an attractive alternative for many temperature measurement situations. AD590 does not need linearization circuitry, precision voltage amplifiers, resistance measuring circuitry and cold junction compensation in temperature measurement. AD590 can also be used for temperature compensation or correction.
The AD590 is an integrated‑circuit temperature transducer that provides a current proportional to absolute temperature. It operates from a supply voltage of +4 V to +30 V and outputs 1 µA per Kelvin, eliminating the need for external linearization circuitry.
Typical applications include temperature measurement, compensation, and remote sensing where the high‑impedance current output allows long cable runs and easy multiplexing. The device is offered in a metal‑can TO‑52 package and is supported by extensive trimming options for high accuracy.
| Output Current per Kelvin | 1 µA/°K |
|---|---|
| Supply Voltage Range | +4 V to +30 V |
| Temperature Range | -55 °C to 150 °C |
| Package | Metal Can TO‑52 |
| Nominal Output Current at 25 °C | 298.2 µA |
| Maximum Junction Temperature | 175 °C |
| Power Supply Rejection (±4 V to ±45 V) | 0.5 nA |
The AD590 outputs a constant current of 1 µA for each Kelvin of temperature.
The device operates with a supply voltage between +4 V and +30 V.
It can measure temperatures from –55 °C up to 150 °C.
The AD590 is provided in a metal‑can TO‑52 package.