ADS7950: REFP pin current draw

Xiaoping Han

Part Number: ADS7950

What is the REFP pin max current draw? Have an application with one source driving multiple ADC chips. Would be nice the info is in datasheet.

over 1 year ago

0 Tom Hendrick over 1 year ago

TI__Guru**** 174346 points

Hi Xiaoping,

Welcome to our e2e forum! If you look at the reference input resistance on page 13, you can assume ~25uA of current would come from the reference source while the device is converting. How many ADC's do you plan to use? Will they all be sampling in parallel or in a sequential manor?

0 Xiaoping Han over 1 year ago in reply to Tom Hendrick

Prodigy 30 points

Thanks Tom!

There will be 8 sampling in sync. The source can easily provide 0.2mA but not sure about 80uF.

Data converters

Data converters forum

ADS7950: REFP pin current draw