We have isolated the problem. On the output of the AD420 (the 4-20mA Iout line pin 18) we had a transient voltage suppressor which when remove led to the drift being eliminated. For some reason the transorb was causing the analog drift on…
By mistake, I have provided -12V instead of +12V to the AD420.
I have measure the output, it is giving 9.93V on Pin 17.
Have I lost the IC? Any solution for that.
How can I test or check, whether it will work or not?
Hi Mr. K,
Apologies for the delayed response.
The data sheet says not to connect anything to this pin so I would advise to follow it and remove the capacitor connected to pin 22 of the part. Unlike pins 1, 12, 13 and 24 which do not have internal connections…
问题1： AD5420的PIN 1、4、5、12、11均为GND，数字地和模拟地应该怎么区分？
I have prepared circuit using LM358N op-amp for output voltage range -2.5V to +2.5V, as per attached file.
But it is not giving proper output. What may be the issue in it?
I use an AD5420 to produce a precise 0-20mA output current.
Is it preferrable to compensate the offset and gain errors by firmware or there is some internal compensation circuitry in the AD5420 to do this ?
In the AD420 the compensation can…