Post Go back to editing

Difference between pseudo differential and differential ADC

Hello everybody,

I'm facing some existential questioning and I'd be happy and relieved if someone come along with me in my quest.

I'm using the AD7451 a 12 bit pseudo differential ADC in my design to better cancelation of common mode noise as my sensing and processing functions are on two separate boards.

I now want to change to an AD7450 the differential version to convert a differential signal. Here is my question. How come one is differential and other fully differential while their respective datasheets show the same internal structure?

http://www.analog.com/static/imported-files/data_sheets/AD7450.pdf

http://www.analog.com/static/imported-files/data_sheets/AD7441_7451.pdf

Thank you guys.

Parents
  • Hi arocklife,

    Yes, the internal structure of the AD7450 and the AD7451 are very similar. For the purposes of describing the input structure on the datasheet, they are identical. The only difference in the AD7451 Vin- input needs to be tied to a DC input.

    If you are looking to use the AD7450, also consider the AD7450A which is a similar part. The differences are that the AD7450A is available in a smaller package and it has slightly better specifications than the AD7450.

    Regards,

    Claire.

Reply
  • Hi arocklife,

    Yes, the internal structure of the AD7450 and the AD7451 are very similar. For the purposes of describing the input structure on the datasheet, they are identical. The only difference in the AD7451 Vin- input needs to be tied to a DC input.

    If you are looking to use the AD7450, also consider the AD7450A which is a similar part. The differences are that the AD7450A is available in a smaller package and it has slightly better specifications than the AD7450.

    Regards,

    Claire.

Children
No Data