The recommended PCB layout for the TDA8708AT involves keeping the analog and digital grounds separate, using a star-point grounding scheme, and placing the decoupling capacitors close to the IC. A 4-layer PCB with a dedicated ground plane is also recommended.
To ensure the TDA8708AT is properly powered, use a stable power supply with a low ripple voltage, and decouple the power pins with 10uF and 100nF capacitors. Also, ensure the voltage supply is within the recommended operating range of 4.5V to 5.5V.
The maximum clock frequency that can be used with the TDA8708AT is 20MHz. However, the recommended clock frequency is 16MHz to ensure reliable operation and minimize power consumption.
The TDA8708AT can be configured for different audio formats by setting the appropriate values for the format select pins (FS0 and FS1). For example, setting FS0=0 and FS1=0 selects the I2S format, while setting FS0=1 and FS1=0 selects the MSB-first left-justified format.
The mute pin on the TDA8708AT is used to mute the audio output during power-up or power-down sequences. When the mute pin is pulled low, the audio output is muted, and when it is pulled high, the audio output is enabled.
