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AMC1311-Q1: AMC1311

Sunil Bhat
Prodigy 10 points

Part Number: AMC1311-Q1
Other Parts Discussed in Thread: AMC1311, XTR112

We have four Flow battery Stacks of 60V each in series. We need to measure the voltages of each stack with isolation and highest available accuracy. For this i have chosen this part. Now the Output of this device is differential. I want to convert this output to current as the Board measuring this voltage is about 20 metres away. I have tried to create a circuit which does the measurement for single voltage source having current as afinal output. Need support what is the best part to be used to convert this voltage signal to current maintaining highest possible accuracy . Appreciate your support . Also attached is the TINA file . volt sensor opto rev2.TSC

  • 0
    TI__Guru**** 182761 points

    Hi Sunil!

    Welcome to our e2e Forum!  Sounds like an interesting application!  We are looking into this for you and will try to come up with a solution, give us the weekend to  go over some options and we'll get back to you on Monday the 15th.

  • 0 in reply to Tom Hendrick
    TI__Guru**** 182761 points

    Hi Sunil,

    I was hoping to get more time with this but, one thought I had would be to try and use something like an XTR112 or XTR114 to try and realize what it is that you want to do here.  My thinking was that you could use the differential output of the AMC1311 to drive the input of the XTR.  The common mode output of the AMC would work with the XTR, but the input span is only 1V.  It might be easier to simply do a differential to SE stage on the output of the AMC1311 and then follow that with a floating load to current configuration.