The recommended PCB layout for the MAX9850ETI-T involves keeping the analog and digital grounds separate, using a solid ground plane, and placing the device close to the audio input and output connectors. Additionally, it's recommended to use a 4-layer PCB with a dedicated layer for the analog signals and another layer for the digital signals.
To optimize the MAX9850ETI-T for low noise and high PSRR, ensure that the device is operated within the recommended supply voltage range, use a high-quality power supply with low ripple, and add decoupling capacitors close to the device. Additionally, use a low-ESR capacitor for the AVDD pin and a high-value resistor for the REXT pin.
The maximum input signal amplitude that the MAX9850ETI-T can handle is 2.2Vrms, which is equivalent to 3.1Vp-p. Exceeding this amplitude may result in distortion and clipping of the output signal.
Yes, the MAX9850ETI-T can be used in a stereo audio application by using two devices, one for the left channel and one for the right channel. Each device should have its own set of input and output connectors, and the master clock should be shared between the two devices.
The MAX9850ETI-T can be configured for different audio sampling rates by adjusting the master clock frequency and the MCLKDIV pin. For example, for a 44.1kHz sampling rate, the master clock frequency should be set to 256 x 44.1kHz = 11.2896MHz, and the MCLKDIV pin should be set to 256.
MAX9850ETI-T datasheet
by Maxim Integrated Products
