2KV High-side, low-current measurement

The 600V DC working voltage is very conservative, but there's another factor to consider (which I did not in my initial response): creepage. Using the IEC 60664-1 insulation coordination standard, a 2 kV DC working voltage requires 14 mm creepage. This is assuming basic insulation with the equipment operating in a pollution degree 2 environment.

You can run two isolators in series to effectively cut the working voltage in half for each component. This reduces the creepage requirement to 7.1 mm, which any of our 16-SOIC packages will meet. The ADuM6000 could support 1kV DC working voltage. ADI has published an app note with an example of this approach. The inefficiency of the ADuM6000 is more of an issue. You would need to place a 2-channel isolator in series with the AD7401A, such as the ADuM2281.

Sorry I didn't think of this sooner.

DaveC

The 600V DC working voltage is very conservative, but there's another factor to consider (which I did not in my initial response): creepage. Using the IEC 60664-1 insulation coordination standard, a 2 kV DC working voltage requires 14 mm creepage. This is assuming basic insulation with the equipment operating in a pollution degree 2 environment.

You can run two isolators in series to effectively cut the working voltage in half for each component. This reduces the creepage requirement to 7.1 mm, which any of our 16-SOIC packages will meet. The ADuM6000 could support 1kV DC working voltage. ADI has published an app note with an example of this approach. The inefficiency of the ADuM6000 is more of an issue. You would need to place a 2-channel isolator in series with the AD7401A, such as the ADuM2281.

Sorry I didn't think of this sooner.

DaveC