Temperature monitoring circuit composed of the AD590

Published:2011/8/17 21:05:00 Author: | Keyword: Temperature, monitoring circuit | From:SeekIC

The temperature monitoring circuit which is composed of the AD590 is as shown in the figure, it uses the 9V battery as the power supply. In this circuit, A1 is the current/voltage conversion and voltage amplifier circuit, the monitoring temperature range is -50 to +150℃, the output port of A1 is connected with the positive input port of the digital multimeter (monitor circuit). A2 is the O℃ benchmark and temperature correction circuit, the output port of it is connected with the negative input port of the digital multimeter. The AD580 is one kind of precision voltage reference device, it supplies the reference voltage to the A2-A4. The MD590 has the correction error, this has the relationship with the device level, you can use the RP1(500Ω) fine-tuning potentiometer to eliminate the error when the temperature is 25℃.



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