JAJSNO8 January 2022 TAA5242
ADVANCE INFORMATION
All audio data converters require a DC reference voltage. The TAA5242 achieves low-noise performance by internally generating a low-noise reference voltage. This reference voltage is generated using a band-gap circuit with high PSRR performance. This audio converter reference voltage must be filtered externally using a minimum 1-µF capacitor connected from the VREF pin to analog ground (VSS). The value of this reference voltage, VREF, is set to 2.75 V(for 3.3V AVDD) or 1.375V(for 1.8V AVDD), which in turn supports a 2-VRMS differential full-scale input and 2-VRMS differential full-scale output to the device. Do not connect any external load to a VREF pin.