AnsweredAssumed Answered

Wide range capacitance to Digital converter

Question asked by Allen_9 on Oct 2, 2015
Latest reply on Oct 2, 2015 by EricC

Hello guys,


I'm looking for a capacitance to Digital converter for capacitive MEMS accelerometer with the following specs:


1- input range (changing): -+ 300 pF.

2- resolution in the range of few aF

3- parasitic capacitance 150 pF


I looked to AD converters and I see AD7746 might be the closet converter to the above requirements but it needs to be upgraded.


Could please let me know if the AD7746 is a possible choice, or if it needs to be extended or you suggest another converter. Could also suggest an evaluation board that fits this converter.



You support is highly appreciated.