GENERAL DESCRIPTION
The AD590 is a 2-terminal integrated circuit temperature transducer that produces an output current proportional to absolute temperature. For supply voltages between 4 V and 30 V the device acts as a high-impedance, constant current regulator passing 1 µA/K. Laser trimming of the chip’s thin-film resistors is used to calibrate the device to 298.2 µA output at 298.2 K (25°C).

FEATURES
   Linear current output: 1 µA/K
   Wide temperature range: −55°C to +150°C
   Probe compatible ceramic sensor package
   2-terminal device: voltage in/current out
   Laser trimmed to ±0.5°C calibration accuracy (AD590M)
   Excellent linearity: ±0.3°C over full range (AD590M)
   Wide power supply range: 4 V to 30 V
   Sensor isolation from case
   Low cost