ADS7138: what is the analog input impedance?

yang zhou

Part Number: ADS7138

Tool/software:

what is the analog input impedance of ADS7138? Thanks!

0 Joel Meraz 1 month ago

Hello,

The analog equivalent circuit is shown in figure 21 of the datasheet. The input has a typical 150Ω resistance and 12pF capacitance.

Regards,
Joel

0 yang zhou 1 month ago in reply to Joel Meraz

thanks for the answer. And what is the digital input impedance? Thanks!

0 Joel Meraz 1 month ago in reply to yang zhou

The GPIOs have input impedance over 1MΩ, with capacitance ~1.25pF.

Regards,
Joel

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