Hello. I am required to find the solution for the circuit or if anyone can suggest some converter name for this purpose:

From current sensor I recieve AC voltage signal with 0-225 mV range, and on the output it is required to have mA range DC signal.

Best regards, and thanks for the help.

 

hi k98,
Welcome to AAC.
You require a Precision Rectifier followed by a Voltage to Current converter.
For a 225mVac input, what mA DC current output do expect.?
E

 

hi k98,
Welcome to AAC.
You require a Precision Rectifier followed by a Voltage to Current converter.
For a 225mVac input, what mA DC current output do expect.?
E

It is expected 0-20 mA DC output.

 

hi k,
Final question, frequency of the 225mV signal.?
E

 

hi k,
Final question, frequency of the 225mV signal.?
E

The frequency is standard European grid frequency: 50 (Hz).

 

Who is requiring this solution? (School, work, hobby, etc.)

 

Who is requiring this solution? (School, work, hobby, etc.)

It is work oriented.
Best Regards.

 

hi k,
For a 0mA to 20mA output, indicates an AC of 0v to 225mV, NOT just 225mAac
E

Also what is the 20mA load resistance?

 

hi k,
This is one option, there are many precision rectifier circuits.
Used CA3140 OPA
E

 

From current sensor I receive AC voltage signal with 0-225 mV range

I think there is an easy answer that we cannot see because we don't understand the entire project.
What current sensor? That will help us understand much better.

on the output it is required to have mA range DC signal

What is the next circuit that receives the DC current? Is there an IC that uses the current?

 

Use a precision rectifier circuit to convert the low voltage AC to DC.
From here you can convert the DC volts to 0-20mA current loop. You can use a purely analog solution with op-amps or you can use a 0-20mA IC such as AD420.

 

Sounds like a shunt resistor application. Even if not, an industrial shunt resistor signal conditioner would probably do the trick.

https://www.phoenixcontact.com/en-us/products/signal-conditioner-mini-mcr-sl-shunt-ui-nc-2810780

 

Are you sure you want 0-20 and not the standard 4-20?

 

While nailing down the details, does 0 ma = 0 mv in and 20 ma = 255 mv in?

Do you want any negative voltage to be turned into a negative current, or do you want a precision full wave rectification of the input voltage before conversion to an output current?

 

Are you sure you want 0-20 and not the standard 4-20?

0-20mA is also standard. 4-20mA was created specifically for loop powered transmitters (2-wire). 3 and 4 wire transmitters are free to make use of wider range.