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.
Hii my name is aied ,a hardware engineer
i am designing a circuit for voltage measuring purpose , my input comes from CT (current transformer ) with values of 0 to 100mA .and i use an opamp to transform the current to voltage
so the input to my device is current not voltage !!
i need to isolate my device from the environment and i came across your isolation IC products
and my question is, if i have an current input as i described above ( that is not a digital communication line ) what iso isolation chip i can use ?
a will also say that after converting the current to voltage i will get 3.3v DC max using the op-amp
but i need to put the op amp after the isolation chip
in other words do you have a chip that can deliver current from input pin to output pin that is also isolated ?
i can use the op-amp circuit to convert the current to voltage and then connect it to the isolation chip but then i will run the risk of my op-amp circuit is not protected .
i will be very thankful for your help
Alex SmithApplications Engineer | Precision Delta-Sigma Converters
Check out our helpful resources: Common Questions for TI's ADS129x Family of Bio-Potential ADCs
TI Precision Data Converters | TI Precision Labs - ADCs | Analog Engineer's Calculator | Data Converters Learning Center | Selection Guide
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Alexander Smith:
thanks for your answer
i looked up the datasheet for the AMC chip family
and i have a question
it seem that the AMC family is suitable for my application because they have the isolation that i need , but i didn't understand how to use them
i have an input current with a sine wave shape with an amplitude that can range from 0 to 100mA and frequency of 50 hz .
if i feed this current to a 30 ohm resistor i will get a sine wave voltage with an amplitude of 3v=100mA X 30ohm with a frequency of 50hz.
i want to transmit this sine wave with an amplitude of 3 volts and frequency of 50hz from input of the AMC isolation amplifier to the output ,cause i need to convert this sine wave voltage trough an ADC converter on the other side of the AMC isolation amplifier
from what i saw in order to keep linearity that the AMC1300 can accept 50mv between the input pins , but i want to transmit a 3 volt sine signal through the AMS isolation amplifier
how can i do that ?-
again i be happy for your help if you can shed some light on how to do this application .
In reply to AIED BEBAR:
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.