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FDC2214EVM: Using 2 channels in differential sensor configuration

Eddie Koh
Genius 10635 points
Part Number: FDC2214EVM
Other Parts Discussed in Thread: FDC2214

Is it possible to use FDC2214 in two channels in differential sensor in this configuration?

- Using 3 ‘plates’.

- CH0 and CH1 will be sharing one large plate. 

Observation: When IN0A and IN1A connected to the same plate, the capacitance value is very strange and changes drastically. Am I unable to have a shared plate?

  • 0
    TI__Mastermind 40295 points

    Eddie,

    Unfortunately the devices' internal connections don't support shared sensors using the differential mode connections described in section 10.1.1 of the data sheet.
    Does your application allow successive single-ended measurements, with capacitances calculated in post-processing?

    Regards,
    John