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 9 years ago

0 Tom Hendrick over 9 years ago

TI__Guru**** 168735 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 9 years ago in reply to Tom Hendrick

Guru 28715 points

Tom

Thanks for your answer.

My question has been resolved.

Kuramochi

Data converters

Data converters forum

ADS7223 on the single input