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TMUX1101: Bridge switch for 1 electrode to Cap Pin of MSP430fr2512

DINH CUONG LE
Prodigy 30 points
Part Number: TMUX1101
Other Parts Discussed in Thread: MSP430FR2512,

Hello TI experts,

 I am trying to find the smallest switch to integrate in a capacitive sensor (using MSP430FR2512)
- This switch serves as a bridge between <electrode - CAP pin>
- My goal is to determine the capacitance difference between 2 cases (Son- Soff)
- I intend to use TMUX1101, but I am not sure this switch will work in my application. I'm afraid MOSFET switches are not like mechanical switches (keep the capacitance value almost exactly)

please hep me!

  • 0
    TI__Expert 5660 points

    Hello, and welcome to E2E!

    TMUX1101 is a precision switch designed for applications such as test & measurement. Its low on-resistance, low on/off capacitance, and low leakage current are features that make TMUX1101 a high performance device for precise measurements.

    TMUX1101 is certainly available in a small package to decrease the footprint in your system, an advantage over using a mechanical switch.

    Let me know if you have any additional questions.

    Best regards,
    Kate

  • 0 in reply to Kate Dickson
    Prodigy 30 points

    tks for your rep

    I will request samples from TI to include in my sample design, until then I will give you the correct result

  • 0 in reply to Kate Dickson
    Prodigy 30 points

    Dear TI,

    I recieved TMUX1101 sample from TI, and i am testing.

    Initial results are very good, I think my problem has been solved. However, I will test more to ensure reliability.
    Thank you for your support as well as Arrow VN