• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 48 subscribers
  • Views 1224 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.

Original question:

AMC1311-Q1: AMC1311 for 4 to 20mAmp current measurement- Circuit Review and Shunt Value

TLV6001: TLV6001 Power Supply Requirements

HARANATH VASAM1
Intellectual 300 points
Part Number: AMC1311-Q1
Other Parts Discussed in Thread: TLV6001

We are planning to use AMC1311B for AC Voltage measurement. Schematic is as given beloe

Question:
1) We would like to measure both positive and negative side of the input.ie. -3.3V to +3.3V So is it required to give –ve supply to Pin 2 of U2 (TLV6001) in the above diagram? Please note that we are using filtering –ve and +ve to opamps used in filter circuit as shown below.

Or shall I modify as given below...

Will the above Circtuit works ?

Requesting for quick reply.

  • 0
    TI__Expert 6625 points

    Hi Haranath, 

    TLV6001 has a recommended power-supply voltage range of 1.8V to 5.5V or +/-0.9V to +/-2.75V. So the device won't work as desired when using a power supply of +/-3.3V. And yes, you need to use a dual-supply if you would like to measure below ground. 

    Based on your application, looks like you will need to use a high-voltage part. Can you provide me your desired input and output for the op amp, based on that I can recommend a part that will work for you along with a recommended circuit configuration. 

    For the filtering circuit, looks like you're using OP400, this is an analog part. Can you also elaborate on what's the purpose of the filtering circuit?

    Best Regards,

    Bala Ravi

  • 0 in reply to Bala Ravi
    TI__Expert 6625 points

    Hi Haranath,

    I will go ahead and close this thread for now. If you still have questions about this, please start a new thread. 

    Regards,

    Bala Ravi