ADAU1452 DATA SHEET

Thread Summary

The user inquired about the schematic correctness and the connection of the 'FILTER OUT' and 'OP_AMP_REF' in the EVAL-ADAU1466Z user guide. The final answer clarified that the 'FILTER OUT' is an internal reference voltage for the AD1938 codec and should not be used elsewhere, while 'OP_AMP_REF' is a 2.5V reference voltage generated by a dual op amp for biasing ADC inputs. The ADAU1452 and ADAU1466 are pin and software compatible, but the ADAU1466 has additional features such as more memory and higher SPDIF and I2C speeds.
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