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Celsius-to-digital thermometer works with remote sensor.(design ideas)

YOU CAN USE a single-supply system to precisely measure the temperature at a remote location with less than 1[degrees]C error over a 0 to 100[degrees]C range (Figure 1). The circuit includes [T.sub.1], a low-cost AD590 temperature sensor; I[C.sub.1], an AD8541 rail-to-rail amplifier; four resistors; a trimming potentiometer; and an ADC. You can omit the ADC if you need an analog output. You could replace the trimming potentiometer with an ADS400 or AD5273 digital potentiometer for easier calibration. The feedback resistor, [R.sub.F], should be a precision resistor to minimize the scale-factor error, but the accuracy of the remaining resistors is not critical. You can choose the ...

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