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Re: [PIC] current sensing with Hall sensor

by Antonio L. Benci-2 :: Rate this Message:

I have just finished a design with this device and an very pleased with the performance. What I have done is used two in parallel with an instrumentation opamp providing 0 -> 5VDC out which equates to 0 -> 50A scaling. I would advise any one using the Allegro device to throughly read all relevant appnotes to obtain the best performance.

A. Benci.

Dr Skip <drskip@...> wrote:>

> I don't remember who asked, but there was a discussion about using wire
> loops
> and Hall effect sensors for current monitoring a while back. I came
> across this
> and will be trying it, so maybe this will help the OP as well:
>
> http://www.allegromicro.com/en/Products/Part_Numbers/0756/index.asp
>
> 20 or 40 mV/A bidirectional and isolated. Only a decoupling cap
> suggested.
> Should be a nice easy pairing for a pic. Even cheaper than a shunt
> alone...
>
> -Skip
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