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AD590 and LM335 Sensor Calibration

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AD590 and LM335 Sensor Calibration

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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). 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:The LM335 is a linear thermal sensor which acts as a constant voltage source. It produces a voltage, V, which is directly proportional to absolute temperature, over its useful range (-40°C to +100°C).

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