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PCM1860-Q1: PCM1860-Q1 Input impedance per analog input pin

user6388211
Prodigy 250 points
Part Number: PCM1860-Q1

Hello team.

When using the PCM1860-Q1, the gain of the analog signal input section is adjusted.

The data sheet only mentions the typical value of 20kΩ for the input impedance.

Could you please tell me the Max / Min value?

  • 0
    TI__Guru 62675 points

    Hello,

    The input impedance of the PCM186x does not change with the gain setting and adjustments are made in the feedback network to accomplish the different gain ranges.

    Therefore, the typical input impedance of 20kΩ applies for all gains.  There will be a typical Guassian 3/4-sigma variation of +/-15-20% over all conditions with most units statistically falling into the much lower variations.