Pseudo Differential Vs Single Ended Input- Connectivity in ADC

Sharvy Mayan

Other Parts Discussed in Thread: ADS1220

Hi All,

Whether I can connect the pseudo differential input as a normal single ended input in ADC. I have seen many of the ADC's are come with pseudo differential in put

with negative input connect to the signal ground ( from the analog source ) and analog input connect to the Positive pin. Will it be a problem, if I am connecting -ve

input terminal of the ADC with the incoming analog source ground and our ADC ground ( as we have done in the case: differential input ADC to single ended

application by tying -ve input to ADC ground ).

Best Regards

Sharvy

over 9 years ago

0 Joachim Wuerker over 9 years ago

TI__Mastermind 23275 points

Hi Sharvy,

this really depends a little on the device you are using.

I answer the question in regards to the ADS1220 we were discussing on the other post.
On ADS1220 you can connect any of the four analog inputs to signal and ADC ground and then use any of the other three remaining inputs as the positive signal input. You will however have to bypass the internal PGA in this case.

Regards,

0 Vinay Agarwal over 9 years ago in reply to Joachim Wuerker

TI__Intellectual 1130 points

Sharvy

You can consult the following blog on precision hub:

Thanks

Data converters

Data converters forum

Pseudo Differential Vs Single Ended Input- Connectivity in ADC