A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the analog and digital signal traces separate and avoid crossing them. Use a common mode filter or a pi-filter to reduce EMI.
Use a low-ESR capacitor (e.g., 10uF) for power decoupling, and place it as close to the device as possible. Ensure the power supply is clean and regulated, with a minimum of 1.8V and a maximum of 3.6V.
Use a low-jitter clock source (<100ps) and ensure the clock signal is clean and stable. A clock frequency of 25MHz or 50MHz is recommended. Use a clock buffer or a clock generator to ensure a stable clock signal.
Use the power-down mode when the device is not in use. Reduce the clock frequency or use a dynamic voltage and frequency scaling (DVFS) technique to minimize power consumption. Optimize the analog circuitry to reduce current consumption.
The ADA-4643-TR1 supports SPI, I2C, and I2S interfaces. Choose the interface that best suits your application. Ensure proper signal termination and use a pull-up resistor for open-drain outputs.
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