• Ok I'm having a senior moment I've clearly misunderstood how prog gain works
    I've been banging away at this all afternoon and not getting anywhere.
    Tried 2 different ADS1115 (16bit)

    I'm tying to measure 0 to 3.3v analog in
    So started with gain setting is 4096 +/- 4.096V
    So if I understand this correctly an input voltage of 2.048 should give 50% of range 32768 and 4.096v would give 65536

    I can't get an val that correlates in any way.
    I've tried other gains same result.
    Any ideas welcomed with thanks.

    Lawrence

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