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FDC2214: Can INTB interrupt pin be triggered by capacitance threshold to save power consumption?

Yi Eason Xiao
Prodigy 10 points
Part Number: FDC2214

To whom it may concern:

we are using FDC2214 to measure the capacitance change when some animals go around. In order to achieve the low power consumption, can we use the capacitance threshold(e.g., a specific value) to trigger INTB function?

  • +1
    TI__Genius 17660 points

    Hello, 

    The INTB of the FDC2214 can only report errors or the data ready field of the status register. Unfortunately, there is no threshold comparison built into this device to allow it to be used as a wakeup. You can reduce the power consumption of the FDC2214 by utilizing the shutdown mode if needed, but this will add time after wake up before a capacitive measurement can be read again. 

    Best Regards, 

    Justin Beigel