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  1. #1
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    resolution of 12bit SAR ADC

    I am currently working on a low speed SAR ADC(around 10KHz sample rate)
    is it possible to get a 12bit resolution with 6bit(from resistors) + 6bit (from capacitors)?

    i know it's possible to get 10bit from poly resistors, but not so sure about capacitors.

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  2. #2
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    Re: resolution of 12bit SAR ADC

    why not? The capacitor has better match quality.



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  3. #3
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    resolution of 12bit SAR ADC

    capacitor is better



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  4. #4
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    Re: resolution of 12bit SAR ADC

    Be carefull...

    6 bit MSB should have 12 bit accuracy not 6 bits. Neither resistor (~8 bits) nor capacitor (~ 10 bits) will give you 12 bit accuracy if you do not employ circuit techniques (like calibration, trimming ).



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