• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 2 answers
  • Subscribers 46 subscribers
  • Views 263 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AMC1306M05: Single Phase Measurement

Arun Kumar Chandrasekar
Prodigy 60 points
Part Number: AMC1306M05

Tool/software:

Dear TI Community

  • 0
    TI__Expert 6060 points

    Hi Arun, 

    The schematic above looks ok, though you don't seem to be using the full scale input range of the device.  Is there a reason you want to use the current sensing device instead of one targeted for voltage sensing?.  One of the differences is as you mentioned, the input impedance, but the other is the input voltage range.  The voltage sensing devices have higher input voltage range, which helps with some noise immunity and accuracy.

    I don't think you'll need an LDO, but if the supply is too noisy you can add some filtering.

    Thanks.

  • 0 in reply to Arun Kumar Chandrasekar
    TI__Expert 6060 points

    Hi Arun,

    You can take a look at this LDO: TPS76350DBVR.  

    The AGND connection is correct in the schematic you've shown.  AGND should be connected to AINN at the shunt for best performance and to establish the common mode voltage of the input pins.  You can't connect AGND to Neutral in your case unless you move the 120Ohm sense resistor to the bottom of the resistor divider (sense resistor connected to Neutral).

    Thanks.