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TMUX4827: Input BW

user5163865
Genius 3980 points
Part Number: TMUX4827
Other Parts Discussed in Thread: TMUX6236, TMUX2889

Hi,

Our customer is looking for a MUX that can switch 125KHz/134kHz, 10Vpp signals, can we use the TMUX4827?
According to "Figure 6-22. Maximum Signal Swing" in the data sheet, it appears that the amplitude is limited to 2Vmax for inputs over 50kHz.

As a result of actual customer trials,
When inputting a signal of 10Vpp_100kHz, the output from D1 is attenuated to 6Vpp.

Please let me know if there is a MUX that can be used with single power supply 5V, 125KHz/134kHz, 10Vpp input/output.

Or does TI recommend a MUX with Vss > 10V ?

Best regards,
Hiroshi

  • 0
    TI__Mastermind 24440 points

    Hello Hiroshi,

    Looking into the portfolio, the best replacement for the TMUX4827 is the TMUX6236.

    It can support the 125KHz/134kHz, 10Vpp input/output signal if the power supplies are set too  5V and -5V.

    Please let me know if you have any other questions!

    Regards,

    Kameron

  • 0 in reply to Kameron Hill
    Genius 3980 points

    Hi Kameron-san,

    It seems difficult to change to TMUX6236 because the customer's circuit already has a single power supply of 5V.

    Is TMUX2889 also unusable under the following conditions like TMUX4827?

    Vdd=5V single power supply
    Input signal: +/-5V,
    Frequency 125KHz/134kHz,

    Best regards,

    Hiroshi

  • 0 in reply to user5163865
    TI__Mastermind 24440 points

    Hello Hiroshi,

    The tmux2889 is also going to struggle if used in  your customer current  application

    So the  tmux2889 is  typically meant for audio applications(so smaller voltage swings and lower (<20kHz) frequencies). +/-5V @ 125KHz/134kHz is considered a large swing for the frequency for this device so the gate of these devices has a little trouble keeping up.

    The next thing we can do is align offline and talk more about this issue.

    Please email me offline.

    Regards,

    Kameron