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AD7730 Fast Step Details

Question asked by Uli56 on Feb 20, 2017
Latest reply on Mar 12, 2017 by jcolao

We are using the AD7730 in a dynamic weight scale application. To improve the speed to fast dynamic signal changes (e.g. discharge a hopper) we activate the FAST mode.

The step response is now, as expected, significantly better. With ramping signals we discovered a problem. We are getting peaks within the ramp. It looks like the filter alternates between fast step and 22 TAP FIR filter.

There is no information about the criterion which causes the switch to fast step and back to normal.

Is there any information available which “rise time” is detected as a step?

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