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TMUX6136: What is the parasitic capacitance between drain and source pins, drain and ground, source and ground, etc.

Part Number: TMUX6136

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My VDD and VSS are +/-3.3V, source/drain amplitudes up to +/-VDD with frequencies up to 2MHz.

 

From what I see in the datasheet, the parasitic values in the datasheet seem to show everything in the 2 - 8pF range, so I don’t anticipate this varying much, but I wanted to see if you could confirm the values requested from the customer below:

 

What are the reactive elements (parasitic capacitance) between the following:

  1. S1A to GND à 5.5pF (7.5pF max), Vs = 5V, f =1MHz (VDD = 12V, VSS = 0V)

  2. S1A to S1B à Not listed in datasheet?

  3. S1A to D1 à Not listed in datasheet?

  4. S1B to D1 à Not listed in datasheet?

  5. D1 to GND à 5.5pF (7.5pF max), Vs = 5V, f =1MHz (VDD = 12V, VSS = 0V)

  6. Channel to Channel isolation à Wouldn’t this be XTALK = -110dB (VDD =12V, VSS = 0V) à How much would this vary going to +/-3.3V supplies

  

 

Thank you,

Adam

  • Hi Adam,

    How did you select the TMUX6136 for your application? You mentioned the VDD and VSS are +/-3.3V, source/drain amplitudes for your application but the TMUX6136 is a mid-voltage mux (> +/- 24V) and violates the power supply differential min spec in the TMUX6136 datasheet.

    For the question on capacitance, the values you see in the datasheet are lumped capacitance values and cannot measure the difference between the source and drain or source and ground capacitance. I included the terminologies for the ones we show in the datasheet:

    • 1A to GND à 5.5pF (7.5pF max), Vs = 5V, f =1MHz (VDD = 12V, VSS = 0V) - CS(ON)

    • S1A to S1B à Not listed in datasheet? We refer to this as intra-channel crosstalk, we specifiy Channel-to-channel crosstalk

    • S1A to D1 à Not listed in datasheet? If SIA-D1 path is enabled, this would be bandwidth of the switch

    • S1B to D1 à Not listed in datasheet? If DIB to DI path is off, this will be off-Isolation highlighted in the datasheet. 

    • D1 to GND à 5.5pF (7.5pF max), Vs = 5V, f =1MHz (VDD = 12V, VSS = 0V) , CD(ON)

       

    The TS12A12511 is a device you can look at that supports +/-3V supply. 

    Thanks

    Saminah