pipeline ADC 'latency

[iexplorer]

How can I measure the quantization noise between one value and its output ,
there is a several clock periods latency between them , is there anyway to get the precise I/O curve?

 

[A.Anand Srinivasan]

there is a latency between the input and output.... so you buffer the input say using a sample and hold and then subtract the corresponding output to get the quantisation noise.... the number of buffers needed would depend on the latency....

 

[iexplorer]

Thanks for your reply.You mean that I can buffer several SHAs and fix the latency? But how can I guarantee the dummy latency is exactly?SHA and MDAC have different delay. After all, a little deviation between the points can make the performance look different.

 

[A.Anand Srinivasan]

what i meant is use a S/H to hold the value till the output arrives and when the output arrives you can subtract it and find the quantisation noise.....