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AD590 - 2-Wire/ Current Output Temperature Transducer

General Description

The AD590 is an integrated-circuit temperature transducer which produces an output current proportional to absolute temperature.

The device acts as a high impedance constant current regulator, passing 1µA/oK for supply voltages between +4V and +30V.

Key Features

  • Linear Current Output.
  • 1µA/oK.
  • Wide Temperature Range.
  • . -55oC to 150oC.
  • Two-Terminal Device Voltage In/Current Out.
  • Wide Power Supply Range.
  • . . . +4V to +30V.
  • Sensor Isolation From Case.
  • Low Cost Ordering Information.

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Full PDF Text Transcription (Reference)

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AD590 August 1997 2-Wire, Current Output Temperature Transducer Description The AD590 is an integrated-circuit temperature transducer which produces an output current proportional to absolute temperature. The device acts as a high impedance constant current regulator, passing 1µA/oK for supply voltages between +4V and +30V. Laser trimming of the chip's thin film resistors is used to calibrate the device to 298.2µA output at 298.2oK (25oC). The AD590 should be used in any temperature-sensing application between -55oC to 150oC in which conventional electrical temperature sensors are currently employed.