Power Isolation Filters

Core Audio ADC

Here is our core audio ADC module with its two power isolation filters made of two ferrite beads. Now, we need to add the regulators to turn 15V into 5V and 3.3V. The reference design for the AK5397 uses an NJM78M05FA to go from 15V to 5V for the analog section, and a μPC29M33HF to go from 5V to 3.3V for the digital section. Personally, I am much more inclined to use the ADM7150, and to power the analog section with multiple regulators, so we’ll do some more design work…


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