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AD7147/AD7150/AD7745 expention of capacitance measurement range

Question asked by ricky on Feb 14, 2016
Latest reply on Feb 21, 2016 by ricky

Hi All,

 

One of my customer is planning to design his humidity sensor.

To measuring humidity, measurement of capacitance of his sensor head is the key element for his design.

His sensor has around 50pf base capacitance and 20pF to 30pF change range depends on humidity applied.

Is there any way to expend measuring range of AD7147 or AD7150 or AD7745 for the above mentioned humidity sensor?

 

Best Regards,

  Ricky

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