0
\$\begingroup\$

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.

\$\endgroup\$
1
\$\begingroup\$

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

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

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.