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I am trying to interface Acs712 current sensor IC with an energy metering Ic(Ade7858),there are two problems am currently facing.

1) The energy metering Ic takes in bipolar input (± 0.5 V) which is designed to use current transformer but the output from Acs712 is uni-polar which is (0-5v).

enter image description here

2)I tried using the schematic above to convert uni-polar (0-5v) to bipolar(± 0.5 V) which gives a single ended output but the inputs for the Ade7878(energy metering IC) is differential input as shown in the below diagram from datasheet.

enter image description here

kindly suggest me if I should go with a single ended to differential converter if am not wrong or is there a better cost effective solution.

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The ACS output is centred upon Vcc/2

You could generate a Vcc/2 with a voltage divider and a buffer opamp and feed that into the differential input to satisfy the input requirement

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  • \$\begingroup\$ sorry i still don't follow can you please explain. \$\endgroup\$ – srinivas May 24 '15 at 3:48

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