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Reference Designs
Documents What is ADG702 used for?
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  • +CN-0172: FAQ
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    • CN0287 limitations due to common SPI lines (AD5201 & AD7193)
    • CN0287: Isolated 4-Channel, Temperature Measurement Circuit
    • How could this circuit use one temperature sensor to do cold junction compensation (CJC) for 4 channels TC?
    • How to compensate the Thermocouple NON-Linearity?
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    • What's the advantage and disadvantage of TC compared with RTD?
  • CN0319: FAQ
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What is ADG702 used for?

Q 

What is ADG702 used for?

 

A 

The ADG702 is used for both RTD and thermocouple measurement.

When processing the signal from RTD, the ADG702 would open to break the
internal loop of AD8603. The AD8603 RTD would generate a current source to
excite RTD.

When processing the signal from thermocouple, the ADG702 would close the
internal loop of AD8603 to generate a buffer circuit providing common-mode
voltage for thermocouple.

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