ADS122C04: NACK all commands

Eren Cimen

Part Number: ADS122C04

ADS122C04 ACK slave address but NACK all commands. In logic analayzer outputs I think everythings is fine. What can be the problem.

Thanks

Best Regards.

over 3 years ago

0 Bob Benjamin over 3 years ago

TI__Guru** 112705 points

Hi Eren,

Welcome to the E2E forum! It does appear that the ADS122C04 is recognizing the addressing but not the command. A couple of things to check and make sure that the AVDD and DVDD supply are both at nominal operating voltage, and that the RESET pin is set high and not floating.

What value of pullup resistor are using on the I2C lines? What are your power supplies for AVDD and DVDD? Have you tried slowing the communication by using a slower SCL speed?

Best regards,

Bob B

0 Eren Cimen over 3 years ago in reply to Bob Benjamin

Prodigy 30 points

Hi Bob,

The problem is about AVDD supply. After figure it out the problem is solved. Thanks for your response.

Best regards,

Eren

0 Bob Benjamin over 3 years ago in reply to Eren Cimen

TI__Guru** 112705 points

Hi Eren,

Thanks for responding back with what you found was causing the issue.

Best regards,

Bob B

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ADS122C04: NACK all commands