The Analog Device Temperature Sensor with an 8” Duct Probe (AD590-D) is particularly useful in remote sensing applications. The AD590 is insensitive to voltage drops over long lines due to its high impedance current output. Any well insulated shielded twisted pair is sufficient for operation hundreds of feet from the receiving circuitry.
The AD590 is a two-terminal integrated circuit temperature transducer which produces an output current proportional to absolute temperature. For supply voltages between +4V and +30V the device acts as a high impedance, constant current regulator passing 1 A/K. Laser trimming of the chip’s thin film resistors is used to calibrate the device to 298.2 A output at 298.2 Kelvin (+25C).
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