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The Avago device is not a bad option BUT the Allegro 714 is ready to go, no 
extra external semi's required. Sensor and signal processing is provided on 
chip. All that is required is a resistor and a capacitor.

A. Benci

Apptech wrote:
> Hall effect
> 
>> Isolated current sensing, have a look at the following...
>>
>> http://www.allegromicro.com/en/Products/Part_Numbers/0714/index.asp
> 
> 
> Or linear optocoupler
> Claim 0.01% linearity
> Avago HCNR201-500E
> Price not marvellous, but cheaper available AND a good 
> enough emulation may be doable with OTS dual and quad optos.
> 
>     http://www.avagotech.com/assets/downloadDocument.do?id=1724
> 

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