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Old Jul 21, 2011, 01:37 PM
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Denmark, Capital Region of Denmark, Naerum
Joined Feb 2011
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Quote:
Originally Posted by flipflap View Post
Notice that this part is no longer in production. From datasheet, it has good linearity (2.8% over full range), and 60mV/A sensitivity.

The datasheet gives an offset of 600mV as you've measured. You have to substract it. So for example 600mV is 0A, and 600mV+60mV = 1A, 600mV+120mV=2A etc.

There is also 68 mV noise, but it should be easily reduced with some filtering.
Year, the 600 mv offset is no problem at all - the problem was, that it couldn't measure 0-6 A. The capacitor removed the ripple from the ESC, but the current sensor wasn't too happy about the large capacitance. A normal lowpass-filter with a low capacitance works better .
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