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.