ADUM4190BRIZ Isolation Amplifiers 5kV High Stability Isolated Error Amp's datasheet doesn't shows any application of analog isolation, it is particularly seems to be used for power supply isolation.
For my application in multi-channel system, we need to provide analog isolation between digital to analog 's output and power amplifiers. DAC output is bipolar and 3dB bandwidth required is min 350KHz.
SN:
The ADuM4190 is designed for use in providing isolated feedback in isolated power supply applications, and in these closed loop applications the accuracy can be +/- 1%.
The ADuM4190 can also be used as an isolated amplifier in an open loop application as shown in figure 29 of the datasheet with much larger output characteristics error specifications as shown in table 1. For example the EAOUT Output Characteristics has a specified max gain error of +/-0.17%, offset error of +/-0.4V and linearity of +/-1%.
An application to isolate a bipolar DAC output is difficult because the ADuM4190 input voltage range is only from +0.35V to +1.5V.
Also, the required 3dB bandwidth of 350KHz is more than the ADuM4190 minimum guaranteed bandwidth of 250kHz.
Regards, Brian