ADS125H02: ADS125H02 schematic review requirement

Eason Yuan

Part Number: ADS125H02

Hi Team,

Please review the schematic below, we use the recommend c code but the ADC.

However, after the initialization, the start pin of the sampling pin changes from low to high, and DRDY is always low. The ADC doesn't work.

over 5 years ago

0 Eason Yuan over 5 years ago

TI__Intellectual 840 points

ADD Screenshot about SPI communication：

ch4=DIN ,ch2=CLK; ch3=CS1

0 Christopher Hall over 5 years ago in reply to Eason Yuan

TI__Mastermind 44720 points

Hi Eason,

Thanks for the schematic screen-clipping. It looks like DVDD and VREFP are missing connections to a voltage source. Currently these pins appear to be floating, is that correct?

Without DVDD, the ADS125H02 will not respond to any SPI commands, and without a valid reference voltage the ADC's conversion results will be incorrect.

0 Eason Yuan over 5 years ago in reply to Christopher Hall

TI__Intellectual 840 points

Hi Chris，

Thanks for your reply,

It can setup now, but we met CRC issue.

And the customer use the resource code as we recommended.

So could you please release the right one CRC code to me?

Thanks!

Eason Yuan

0 Christopher Hall over 5 years ago in reply to Eason Yuan

TI__Mastermind 44720 points

Hi Eason,

Apologies, but I don't quite follow your last question...

Has the customer tried referencing the ADS125H02 Example C Code to see how to implement the CRC computation? Also, the ADS125H02 Design Calculator provides a CRC calculator to you determine or verify the CRC values on DIN and DOUT.

If you can share additional details about the problem I'll be glad to look into it.

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ADS125H02: ADS125H02 schematic review requirement