ADS1298: Max SPS and corresponding total data bits

Benjamin Nordman

Part Number: ADS1298

Hello TI community,

I just read in the datasheet, page 53, the following statement :

The data format for each channel data is twos complement and MSB first. For the ADS129x with 32-kSPS and 64-kSPS data rates, the number of data bits is 24 status bits + 16 bits per channel × 8 channels = 152 bits. For all other data rates, the number of data bits is 24 status bits + 24 bits per channel × 8 channels = 216 bits.

First question : Is the ADS1298 really able to reach 64-kSPS, while it is said that the maximum sampling rate is 32kSPS (cf. pages 5 and 67)?

Second question: for 32-kSPS, should I really expect to get 152 bits instead of 216 bits in the data stream?

Thanks for your help.

over 3 years ago

+1 TCT over 3 years ago

TI__Genius 11550 points

Hi Ben,

Thanks for pointing out the typo on the datasheet. We will revise the datasheet in the next revision cycle. The ADS1298 maximum sampling rate is 32kSPS. You should expect to get 216 bits (24-bit status bits + 24 bits per channel x 8 channels) in the data stream regardless of the device data rate.

Thanks

-TC

0 Benjamin Nordman over 3 years ago in reply to TCT

Intellectual 390 points

Hello TCT,

Thanks a lot for this quick reply.

Is there a way to be automatically acknowledged of the release of a new document revision?

Best Regards,

Benjamin

0 TCT over 3 years ago in reply to Benjamin Nordman

TI__Genius 11550 points

Hi Benjamin,

I'm not aware of any automatic way of acknowledging the release of a new document revision.

Thanks

-TC

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ADS1298: Max SPS and corresponding total data bits