JAJSCZ5C March 2017 – Janaury 2020 AMC1306E05 , AMC1306E25 , AMC1306M05 , AMC1306M25
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In motor control applications, a very fast response time for overcurrent detection is required. The time for fully settling the filter in case of a step-signal at the input of the modulator depends on the filter order; that is, a sinc3 filter requires three data updates for full settling (with fDATA = fCLK / OSR). Therefore, for overcurrent protection, filter types other than sinc3 can be a better choice; an alternative is the sinc2 filter. Figure 58 compares the settling times of different filter orders.
The delay time of the sinc filter with a continuous signal is half of the settling time.