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IL135Z

Integrated circuit of temperature sensor

IK Semicon Co., Ltd 

Heat conduction , (%)

IL135Z

Heat conduction, (%)

Time, (min)

Figure 11 – Time dependence of heat conduction

in still air

Time, (min)

Figure 12 – Time dependence of heat

conduction in agitated oil

Direct voltage, (V)

Direct current, (mА)

Figure 13 – Dependence of direct voltage on direct current

Information for application.

There is a simple technique of the device calibration for improving precision of temperature

measurement (see typical application circuits).

Calibration of the device occurs in one spot as the IC output voltage is proportional to absolute

temperature with sensor voltage extrapolation to 0 V at 0оК (-273,15оС). The errors in dependence

of output voltage on temperature are determined only by characteristic incline. Therefore bias

calibration at one temperature corrects errors in the whole temperature range. Output voltage of

calibrated or non calibrated circuit may be derived from the following equation:

T

VOT = VOTO ;

To

where Т – unknown temperature;

ТО – reference temperature (in оК).

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