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Old 01-20-2011, 01:51 PM   #4249 (permalink)
MPaulHolmes
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Oh by calibrated, I just mean figure out the distance from the bus bar to the current sensor such that -1000 amps to 1000 amps corresponds to the linear range of the chip. It's a little SOIC-8 chip, that just sits there right on the bar. With a pcb track going right below the chip on the same side of the pcb, the range is about +/- 30 amps. The range gets wider if you increase the distance. For example, to get a -1000 to 1000 range on a 7mT linear range device, you needed a distance of 0.75" from the current sensor to the bus bar. That was a bit annoying, so I think the 25mT one will be better suited.
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