Increasing ADC input range

hulk

Which kind of hardware required to increase the ADC input range. How to process the signals

0 Alexander Smith over 5 years ago

Hi Hulk,

You could use an operational amplifier to attenuate the signal to the input range of the ADC.

We have a great series of videos on opamps as well as ADCs that I think will help you: https://training.ti.com/ti-precision-labs-op-amps

Please let me know if you have further questions.

0 hulk over 5 years ago in reply to Alexander Smith

yes it will done by opamps but how?

For large input signals what should i do to keep good accuracy and resolution.

0 Alexander Smith over 5 years ago in reply to hulk

By setting the value of the gain and feedback resistor to the opamp.

Vout = Vin * (Rfeedback/Rgain)

Where Rfeedback is connected to the output and input of the opamp, and Rgain is connected to the input signal and input terminal of the opamp.

For further information, please consult the videos I previously posted, as well as the cookbook circuits at the bottom of this page: http://www.ti.com/design-resources/design-tools-simulation/analog-circuits/overview.html

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