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BLDC inline phase current measurement

Category: Hardware
Product Number: MAX40056U / ADA4896-2 / AD7380-4

Hi everyone,

I am designing circuit to measure the inline currents of each BLDC motor phase. Because the ADC (AD7380-4) has fully differential analog inputs I came up with 2 different solutions of how to connect the CSA (MAX40056U) to the ADC:

- use the pseudo-differential signal or

- convert single-ended signal to fully differential one

Below I attached two schematics. I would like to ask you to have a look and say if they are correct and which way is more proper. Thank you in advance.

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