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Ratiometric voltage reference for Delta-Sigma ADC - TI Training " Designing with Delta-Sigma ADCs Training Series"

Yan Fan
Intellectual 360 points
Other Parts Discussed in Thread: REF5025, ADS1259

Dear TI E2E forum, 

While I was watching the voltage reference for Delta-Sigma ADC - TI Training " Designing with Delta-Sigma ADCs Training Series", it showed a comparison of noise between internal reference, REF5025, and Ratiometric options. I was wondering whether someone could point me to the reference material on this ratiometric design consideration? ADS1259 datasheet also mentioned this Ratiometric configuration but I have not yet found any material explained in detail. 

Thank you in advance, 

Yan.