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ENOB and Resolution

Hari T O0
Genius 3820 points

Hi,

I have a 14-bit ADC. However, looking at the datasheet , the effective number of bits (ENOB) is always less than 12 bits.

Why is my the ADC claiming to be a 14-bit ADC when it only has 12-bit accuracy? What is the point of having two extra bits if they are meaningless?

When calculating 1LSB do I need to consider resolution as 12bit or 14bit. When we will get full resolution 14bit from ADC.

Regards

Hari T O