[sdiy] CV input op-amp circuit

[Christian Maniewski]

Hi all!

I’m trying to come up with an op-amp design for a CV input. I want to transform a signal ranging from -5V to +7V to a more MCU digestable 0-3.3V. I came up with the circuit you’ll find attached.

I have seen other approaches, where an offset reference is injected in the feedback loop, while the positive op-amp input is grounded. Are there any disadvantages to my approach or is it also valid?

Thank you so much!

I’ve been following this email list for some time now. This is my first question and first email entirely. Please bear with me.

Chris

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