Monitoring voltage and current ?

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  1. - 26th March 2009, 16:45 #4
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    mister_e
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    I would consider a better op-amp for this purpose. LM741 is noisy enough, and probably not good enough for really low voltage range. CMRR spec must be good, LM741 CMRR specs are poor. Check Microchip AN894, it has some nice theory in. Not sure if I agree them<all but, good enough to give you some ideas.

    http://ww1.microchip.com/downloads/e...tes/00894a.pdf
    Last edited by mister_e; - 26th March 2009 at 16:48.
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