Switching Transient Artifacts of Current Measurement Circuit

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Mon, 2020-03-16 09:20
#1
Peter Luo
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Switching Transient Artifacts of Current Measurement Circuit

Hi Dialog,

The document://www.wsdof.com/sites/default/files/um-b-114_da1453...says:

9.1 Switching Transient Artifacts of Current Measurement Circuit
When the current measurement circuit changes scale, it presents some small or large voltage step
on the A/D converter inputs. An ideal converter (infinite bandwidth) would produce a single spike at
the point of switching. But since the converter is not ideal, it produces a ringing like waveform (Figure
52).

How about DA1469X Development Kit – Pro? It adopts simliar current measurement circuit, has same issue?

Thanks, Peter

Device:
DA1469x
Mon, 2020-03-16 12:19
PM_Dialog
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Hi Peter Luo,

Hi Peter Luo,

Please check out theUM-B-093 User Manual: DA14695 Pro Kit. In section 3.7 Current Measurement Section in DA1469x DK PRO, you will find that the only known limitation is that the measurement accuracy between 500 µA and 1 mA is worse than the typical 1% we have in all other cases (from 1 µA to 250 mA).

Thanks, PM_Dialog

Accepted answer
Mon, 2020-03-16 12:46
Peter Luo
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Hi Dialog,

Hi Dialog,

Very happy to hear DA1469X Development Kit Pro has no switching transient artifacts issue.

Thank you so much!

Peter

Accepted answer