ADS7882: Cannot read the data

Lacey Lin

Intellectual 2900 points

Part Number: ADS7882

Hi team,

My customer use the ADS7882 as below schematic:

But he cannot read the data using the sequence in our datasheet. (Figure 2 and Figure 5)

Can you help to review the schematic and make some comments to the problem?

Thanks a lot!

Lacey

over 6 years ago

0 Cynthia over 6 years ago

TI__Mastermind 24970 points

Thank you for the post Lacey,
We are looking at it, and will get back you soon
Regards
Cynthia

0 Luis Chioye over 6 years ago in reply to Cynthia

TI__Guru 54576 points

Hi Lacey,

Sorry for the delay, it appears we missed this post. If the customer is still experiencing issues:

-Can you show in the schematic the complete driving circuit, or what circuit or amplifier is driving the SAR ADC input /RC filter at pin 6?
-Please describe the problem, i.e, what voltage is applied at the input and what is the code result obtained.
-Can you please a few oscilloscope shots showing CONVST, BUSY, CS, RD, BYTE? What is the max. sampling rate required in the application?

Thanks and Regards,
Luis

0 Lacey Lin over 6 years ago in reply to Luis Chioye

TI__Intellectual 2900 points

Hi Luis,

I will ask customer for the details and I will update once I get the information.

Thanks a lot!

Lacey

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ADS7882: Cannot read the data