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PCM1862: Input resistance variation

Kazuki Kuramochi
Genius 10605 points
Part Number: PCM1862

Hello Expert,

I have question regarding input resistance of PCM1862.
I plan to add resister divider before the input of PCM1862 and want to estimate impact from input resistance of PCM1862.
However datasheet only said typical value but I'd like to know about min/Max of input resistance.

I understood it is hard to guaranty.
So could you provide min/Max value as just information?


Best regards,
Kazuki Kuramochi

  • 0
    TI__Guru 64045 points

    Hello,

    The absolute values of the input resistance will vary by roughly +/-15% on a +/-3-sigma type distribution where 1-sigma is about +/-5%. These numbers are approximate but match well with many of the other devices that utilize similar internal components.  

    Note that the ratiometric matching of the resistors in the front-end enable the specified gain error and is much tighter than the absolute variation of the values.

  • 0 in reply to Collin Wells
    TI__Genius 10605 points

    Hello Collin,

    I appreciate your kindly swift reply.
    I understood.


    Thank you and best regards,
    Kazuki Kuramochi