ADS7223 on the single input

Kuramochi Tadahiko

Guru 28715 points

Other Parts Discussed in Thread: ADS7223

Hi.

My customer want to use ADS7223 on Single Input.

Then, is it possible to achieve resolution of 12 bit under the following condition?

- Fully differential mode

- Input Voltage = 0 ~ 3.3V

- VREF = 1.65V

- Input Voltage and VREF are inputted to CHxxP terminal and CHxxN terminal.

If there is short information, please point it out.

Kuramochi

over 11 years ago

0 Tom Hendrick over 11 years ago

TI__Guru**** 176271 points

Hi Kuramochi,

Yes, if you use the 1.65V reference as one of the inputs (to CHxxN for instance) and apply your 0-3.3V signal to the other input, you would be taking a differential measurement between the two. I don't see any reason why you would have any issues reaching 12-bit resolution with the ADS7223. I would suggest that you consider buffering the reference before running it to the input.

0 Kuramochi Tadahiko over 11 years ago in reply to Tom Hendrick

Guru 28715 points

Tom

Thanks for your answer.

My question has been resolved.

Kuramochi

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ADS7223 on the single input