Published:2011/7/6 21:46:00 Author:Christina | Keyword: Temperature measurement, thermocouple | From:SeekIC
The temperature measurement circuit which is composed of the AD7714 and the thermocouple is as shown in the figure. In this application, the AD7714 operates in the buffer mode, this mode can connect with the decoupling capacitor at the front port to filter the noise on the thermocouple leads. In the buffer mode, the common mode range of AD7714 is narrow, in order to make the differential voltage of the thermocouple in the right common-mode voltage range, the AIN2 input port of the AD7714 should be offset to the +2.5V benchmark voltage.
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