Raghunathan wrote:
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But it also sets me thinking as to where would one draw the line when designing a product and a thing like PCB.


Yes, it seems to me that we have completely lost sight of the original 7 bit performance requirement, and we have STILL failed to find our why he needs to do a precision rectifier anyway, when its appears that direct conversion will yield a higher precsion result. This all seems to be straining at gnats.

Fine,in a 14bit plus accurate system, but for 7 bits ? And all this on board design ignores component stability completely, which will dominate performance at these levels of precision. Not forgetting thermal gradients, thermo-emfs etc. etc. etc.

Steve