This is a document about AD1839 silicon anomaly sheet, which introduces known bugs in the current version of AD1839 and recommended workarounds.
This application note describes specific silicon anomalies found in the current version of the Analog Devices AD1839 audio codec. It identifies critical bugs related to ADC phase shifts during data transfers and register programming, as well as potential issues with DAC writes.
The document provides detailed workarounds for these issues, such as synchronizing reset signals with clock edges or writing values twice to ensure correct updates. It also notes that many of these bugs have been fixed in the AD1839A revision.
The bugs have been fixed in the A version of this part (AD1839A).
Synchronize the rising edge of PD/RST with the appropriate LRCLK or FSTDM edge to ensure safe result updates.
Programming the IMCLK divider and ADC sample rate registers should occur during the internal reset time.