ADC Isolation
Anatoliy , 07-08-2019, 11:06 AM
Hello,
Question regarding proper isolation method with following application requirements:
Voltage measurement
20 channels
Solutions for:
+-5 & +-10 V
800 & 1600 Hz sample rate
8 & 16 bit resolution
Reading from Multiple isolated power rails
High density system
EMI EN55022/32 B or better
Reading voltage from high current sensors distributed all over, the sensors are not isolated.
each sensor provides at least one, ac or dc signal, and a return line.
signal cables are a few meters long.
I currently think that channel to channel isolation is required to eliminate ground loops and receive true differential readings which are not cross biased through ground.
What are your opinions?
Question regarding proper isolation method with following application requirements:
Voltage measurement
20 channels
Solutions for:
+-5 & +-10 V
800 & 1600 Hz sample rate
8 & 16 bit resolution
Reading from Multiple isolated power rails
High density system
EMI EN55022/32 B or better
Reading voltage from high current sensors distributed all over, the sensors are not isolated.
each sensor provides at least one, ac or dc signal, and a return line.
signal cables are a few meters long.
I currently think that channel to channel isolation is required to eliminate ground loops and receive true differential readings which are not cross biased through ground.
What are your opinions?
robertferanec , 07-09-2019, 01:38 AM
I am not expert for analogue 
PS: If it would be possible, I would probably try to place a small AD circuit as close as possible to the sensors and then used cables to transfer digital data to the central unit.
PS: If it would be possible, I would probably try to place a small AD circuit as close as possible to the sensors and then used cables to transfer digital data to the central unit.
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