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ad1938+adau1452 noise

Category: Hardware

Dear ADI staff:
I designed a DSP board using AUAU1452 and AD1938, and controlled it using STM32F103RCT6 with a sampling frequency of 48K, using hardware mode,
During testing, it was found that AD1938 had noise issues after heating up. The noise increased with temperature, and when the temperature reached around 75 degrees Celsius, the noise suddenly decreased. After that, the noise remained stable
If heat dissipation is added to AD1938 when the temperature rises, the noise will decrease
Please help analyze the reason, thank you

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