ADS7253: AINP < AINM and AINP > AINM

Hirotaka Matsumoto

Part Number: ADS7253

Hi all

Would you mind if we ask ADS7253?

It seems that there is the difference of input impedance in case of AINP < AINM and AINP > AINM.
As the background of this question, if AINP and AINM are near value, it seems asymmetric behavior due to voltage of AINP.

Kind regards,

Hirotaka Matsumoto

over 5 years ago

0 Abhijeet Godbole over 5 years ago

TI__Expert 5485 points

Hi Matsumoto san

Can you please elaborate more on the issue mentioned in above post. Please let me know the test conditions. Please mention AINP/AINM voltage levels. When you say asymmetrical behavior are you referring to ADC output code.

If you have a schematic of ADC section that you can post that will be great

Thanks & Regards
Abhijeet

0 Hirotaka Matsumoto over 5 years ago in reply to Abhijeet Godbole

Guru 27525 points

Abhijeet san

Thank you so much for your reply.
Now we are checking followings;
-AINP/AINM voltage levels
-ADC output code
-The customer's circuit

We will feed back you soon.
And then, we would like to send you the detail content using private message on E2E.
So, could you accept "Friend request"?
Or, my e-mail address is as follows;
Email : matsumoto-h@macnica.co.jp

Kind regards,

Hirotaka Matsumoto

Data converters

Data converters forum

ADS7253: AINP < AINM and AINP > AINM