N-Channel INA196_x 4-20 mA Current Loop Receiver Sensor Interface

Hardware
1

I want to use the INA196_2 Channel module. Could someone clarify for me:

  • What is the function of the INA196 Current Shunt Monitoring chip?
  • What is the value and specification of the shunt resistor (i.e. tolerance, temperature coefficient)?
  • The specification refers to a 16V supply. I presume I can use this to power the sensor?

Many Thanks

2

Hi,

  1. INA is a current to Voltage converter. This voltage is read by the on board ADC1115.
  2. The value is 4.99Ohm and tolerance is 1%. temperature range is -40’C to 85’C.
  3. Yes, this 16V will power up the sensor.

Let me know if you have any questions.

Thanks

3

Hi,
From your reply I get:

  • 4.99ohm @ 20mA gives a full scale of just under 0.1V
  • With a gain setting of 2 the arduino code comment states +/-2.048V range = Gain 2
  • Under the description tab for the device it says that use a gain setting of 2 and that “at 20mA the raw ADC value will be around 32154”.

What am I missing?

Thanks