ADS1292: Ads1292 offset measurement result can not accept

user4793539

Intellectual 580 points

Part Number: ADS1292

I measured the ads1292 voltage value

VDD 3.3V

VREFP 1.5V

VREFN -1.5V

VCAP1 -0.6V

VCAP2 3.4V

config1 0x02

config2 0x80

Channel1 0x01

Channel2 0x01

I got the ads1292 datas and annalyzed it, but the offset measurement result I can not accept. I attached the test result pictures for channel A and Channel B. what's the problem?

Schematic

over 7 years ago

0 Tom Hendrick over 7 years ago

TI__Guru**** 175291 points

Hi user4793639,

I don't see anything in your schematic or the basic configuration you provided that would cause such a large offset with the inputs shorted to the ADS1292. Are you able to reliably write to and read back all of the configuration registers?

0 user4793539 over 7 years ago in reply to Tom Hendrick

Intellectual 580 points

Thanks！ I found the reason because I misunderstand the data format of ads1292, 0xFFFFFF is not the largest data. ^_^

0 Tom Hendrick over 7 years ago in reply to user4793539

TI__Guru**** 175291 points

Great news! Thanks for letting us know.

Data converters

Data converters forum

ADS1292: Ads1292 offset measurement result can not accept