8.3.11.6 Mute with DAC_MUTE or Clock Error

Under certain conditions, the TAS3251 can exhibit some pop on power down if the device does not have enough time to detect power loss and initiate the muting process. The TAS3251has two auto-mute functions to mute the device upon power loss (intentional or unintentional).

• DAC_MUTE- when the DAC_MUTE pin is pulled low, the incoming serial port data is attenuated to 0, closely followed by a hard analog mute. This process takes 150 samples + 0.2 ms.
• Clock Error Detect - when a clock error is detected on the incoming serial port data, the TAS3251 switches to an internal oscillator and continues to drive the DAC outputs while attenuating the data from the last known good value. Once this process completes, the TAS3251 DAC outputs are hard muted to ground.