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Low group delay ADC and SigmaDSP?

Question asked by LHR on Sep 27, 2010
Latest reply on Oct 15, 2010 by BrettG

For my application involving a control loop, I need an ADC with low group delay or conversion time (<10µs) to ensure stability. Unless I missed something, there is no such ADC on any of the SigmaDSP and this is not compatible with sigma-delta converters.

Is it possible to easily connect a 16 bit 48kS/s SAR ADC to a SigmaDSP (ADUA1701, for example)? The SAR ADC product range from Analog being quite large, I've identified the AD7684 with differential input. Would that chip be suitable and how to use it with the ADUA1701?

Thanks for your help.