OPA2333-HT: ADC buffering

Brandon Dyer1

Part Number: OPA2333-HT
Other Parts Discussed in Thread: OPA2333,

Hello,

I am using the OPA2333 in my application to reduce components to help achieve my design size restraints. I am wanting to use a single OPA2333 device to buffer two separate ADC inputs (one channel on op amp A and the other on op amp B). Should I be concerned with cross talk if I take precautions on the signal traces leading up to the device? I do plan to run each signal trace with enough space between to allow for a ground trace to be placed all the up to the OPA2333. Any suggestions on further protecting from cross talk?

Thank you,

Brandon

over 4 years ago

0 kai klaas69 over 4 years ago

Guru 140200 points

Hi Brandon,

can you show a schematic?

Kai

0 Brandon Dyer1 over 4 years ago in reply to kai klaas69

Intellectual 500 points

Kai,

The schematic below is a simplified schematic (as I am not allowed to share my design) and does not show compensation, input protection, etc. But I believe this will help explain my question better. The signal inputs are on the far left, and the outputs on the right will connect to their own ADC channel on the processor. Obviously, these are both single ended ADC inputs.

0 kai klaas69 over 4 years ago in reply to Brandon Dyer1

Guru 140200 points

Hi Brandon,

if you have doubts, you could use two OPA2333-HT and use only one half for each signal.

Kai

Amplifiers

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OPA2333-HT: ADC buffering