I have tried to find a 12-14 bit resolution AD-converter for synchronously sampling a pulsed signal. The sampled signal is from a Buck switching supply current measurement. The signal is almost square wave shaped and has 400kHz frequency which I need to sample synchronously with 100kHz sampling frequency. The ad converter needs to have a sample and hold circuit so that the measurement can be accurately timed to the center of the pulsed measurement with the 100kHz sample clock signal. The converter would be synchronized to a 100kHz clock, but it should have fast conversion time (under 1000ns) as it is part of a control system and there is additional delay due to isolation and possible buffering. The ad converter also needs to have a parallel interface for the data.
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