I am trying to use the add isolation into a circuit I am designing.
For the digital signals, I have used the ISO7640FMDW and for the analog signal, I have the DA102JC audio transformer.
I now want to change the transformer with the ADuM140D but I am getting nowhere.
Question 1: Can I use the ADuM140D to isolate my analog signal (varying from 100mVpp to around 300mVpp with 20kHz frequency)?
Question 2: If the ADuM140D can be used for analog signal isolation. I used the chip as below:
The signal is from signal generator: 100mVpp @ 20kHz is connected directly to pin 3 and on pin 14 the oscilloscope.
I did not get the signal on pin 14.
I tried at 1kHz and different amplitudes. I also tried a square wave which also did not get out on pin 14.
What I am doing wrong?
Question 3: I cannot use the digital isolator for my anolog signal, would you recommend any that meet the IEC60601-1 standard.
Thanks for the help.