Electronics > Projects, Designs, and Technical Stuff

14.4V ground reference for ADC

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Simon:
That will probably be enough.

Arjunan M R:
one question, the datasheet of the vref says to put a low esr ceramic cap at the supply input for bypassing.
Do i need to care about low esr ??

Simon:
Yes ESR is very important. A real capaocitor is modelled in a theory by a perfect capacitor with a resistor in series. this resistor is the ESR. Equivalent series resistor. If your ESR is high it slows the capacitors response to demand. This is why often you see an electrolytic with a ceramic in parallel because the ceramic has near 0 ESR but they are not large and bigger ones are expensive, so a compromise is made with enough capacity helped by some fast acting capacitance.

Arjunan M R:
here is the datasheet of the capacitor i am using.
I ca't find any values for ESR in it.Please have a look at it.

Arjunan M R:
Is this the ESR?

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