[SOLVED] An example for an op-amp circuit?

DC177E · Jul 17, 2012

Hello All,

Wondering if anyone could give me an example Op-amp circuit that would take a -0.5 to 1.5v input and output a voltage between 0-(any voltage under or equal to 5v) for reading with an ADC? (Sorry if it is a really noob-ish question, don't work with op-amps very often :grin

Thank you in advance.

alexan_e · Jul 17, 2012

you can use a differential amplifier

Apply 0.5v to VR, V1 to gnd and the input to V2.
If all resistors are equal then you will get 0-2v, if you use RF twice the size of R1 then you can get a gain of 2 and 0-4v output.
You can also use a VR of 1v to get some headroom in case the input is <-0.5v and then compensate for this in software

jasonc2 · Jul 17, 2012

Also for future reference there is a great intro to op amps here: https://www.allaboutcircuits.com/vol_3/chpt_8/1.html . It is well written and concise.

[SOLVED] An example for an op-amp circuit?

DC177E

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DC177E

jasonc2

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DC177E

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[SOLVED] An example for an op-amp circuit?

DC177E

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