The customer is evaluating TLV320ADC3101.
Then, the noise level of the low frequency wave region is troubled greatly.
I would like to improve climax of the noise which gets worse rapidly below 50Hz especially, and the noise near 100Hz.
A circuit diagram, a setting register, and a noise waveform are attached.
If there are a remedy etc., please let me know.
7217.TLV320ADC3101EVM_measurement.xlsx
2352.TLV320ADC3101_Register.xlsx
This characteristic is the same result also in an EVM board or a customer design board.
In addition, on the digital microphone of I2S output of the elegance of the other company, a rapid noise level change of a low frequency wave region is not visible.
[Supplement]
・I under check whether there is any noise in a power supply line and line-input.
・The clock is adopting how to use the following.
Thank you for your consideration.