Temperature Sensors

Solid State Temperature Sensor:

AD590

Wide Range: –55 C to +150 C

The AD590 is a linear thermal sensor which acts as a constant current source. It produces a current, I, which is directly proportional to absolute temperature, over its useful range (-50°C to +150°C).

This nominal value can be expressed as:

I = 1µA / K

where I is the nominal current produced by the AD590, and K is temperature in Kelvin.

Temperature controllers use I to determine the nominal temperature, Tn, by the formula:

Tn = ( I / ( 1µA / K ) ) - 273.15

where Tn is in °C.

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