AD1938+1ADU1452 NOISE
Thread Summary
The user reported noise issues with the AD1938 in a DSP board design using AUAU1452 and STM32F103RCT6 at a 48K sampling frequency. The noise increased with temperature but decreased suddenly at around 75°C and remained stable. Adding heat dissipation to the AD1938 reduces the noise. The discussion will continue on the provided EngineerZone link.AI Generated Content
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
hardware
ad1938
AD1938 ADAU1452
processors and dsp
Processors and Microcontrollers
Audio A/D Converters
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Hello lqld,
The same query is registered here as well by another account. I hope it's from same person/company.
ad1938+adau1452 noise - Q&A - SigmaDSP Processors & SigmaStudio Dev. Tool - EngineerZone
So, we will continue the discussion in the above link, and I will close this thread to avoid duplication. So, you will be answered there soon.
Regards,
Harish
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