ADS131E08: Estimating settling time

David Fleissner

Part Number: ADS131E08

From figure 32 of the ADS131E08 datasheet I see that the time for this ADC to fully settle is 3 sample periods (i.e. 3 ms at 1kHz). How much will the ADC input settle in 1 or 2 sample periods if a step input occurs at the same time as a DRDY pulse?

over 8 years ago

0 Ryan Andrews over 8 years ago

TI__Guru 69256 points

Hello David,

Thanks for your post.

If the input step is synchronous to the conversion period, you can expect the next sample to be around 20% of the final value, and the second sample to be around 87%. We have a nice blog post written by one of my colleagues about this topic - have a look!

e2e.ti.com/.../delta-sigma-adc-digital-filter-types-sinc-filters

Best Regards,

Data converters

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ADS131E08: Estimating settling time