INA2227EVM: The noise performance test is worse than the datasheet

lulin chen

Prodigy 10 points

Part Number: INA2227EVM

NOISE-FREE ENOB (±81.92-mV) (ADCRANGE = 0) =IN( FSR/VPP)/IN(2)

FSR=65536,VPP=6.6*STD

test NOISE-FREE ENOB =13.4, but datasheet NOISE-FREE ENOB =14.7

5 months ago

0 Mitch M 5 months ago

TI__Mastermind 30875 points

Hello lulin,

We actually use a different equation for ENOB than you are showing. Similar to the equation here: https://en.wikipedia.org/wiki/Effective_number_of_bits. For SINAD, we use a combination of signal-to-noise ratio and the total harmonic distortion.

Regards,

Mitch

Amplifiers

Amplifiers forum

INA2227EVM: The noise performance test is worse than the datasheet