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ADS1158 analog mux capacitance

Noam Tziony
Intellectual 340 points
Other Parts Discussed in Thread: ADS1158

Hi,

What's ADS1158 analog mux capacitances?

E.g. Cs(OFF), Cd (OFF), Cd(ON) ?

Thanks,

Noam

  • 0
    TI__Mastermind 44720 points

    Hi Noam,

    I'm not sure which parasitic capacitances you're asking for. Are you designing the buffer circuitry or trying to evaluate the memory or cross-talk of the multiplexer?

    We have an IBIS model for the ADS1158 (8117.ADS1158_IBIS_Model.zip). You can see that the shunt capacitance on each package pin to ground is roughly 0.5 pF. Additionally, the sampling capacitors in the ADC modulator will be a few pF.

    Best Regards,
    Chris