50nV Resolution

NorthGuy

Joined Jun 28, 2014
611
Not sure what your point is. Incidentally, I wouldn't call the technique of increasing ADC resolution by oversampling and decimation rare by any stretch.
No. The techniques are not rare. The situations where such techniques would help are relatively rare because front-end precision is usually less than ADC resolution. A typical 10-bit ADC is perfectly good for 0.5% accuracy. Actual signals being measured are usually less accurate. In such situation, there's nothing to gain from oversampling. But people do it anyway.
 

bogosort

Joined Sep 24, 2011
678
No. The techniques are not rare. The situations where such techniques would help are relatively rare because front-end precision is usually less than ADC resolution. A typical 10-bit ADC is perfectly good for 0.5% accuracy. Actual signals being measured are usually less accurate. In such situation, there's nothing to gain from oversampling. But people do it anyway.
I wouldn't even say relatively rare. :) A 10-bit SAR ADC (such as might be found on a uC), referenced to 2.5V, has an LSB of 2.44 mV. It's not hard to think of applications where trading bandwidth for resolution is a win.
 
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