Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow general high-frequency PCB design guidelines, such as keeping the audio signal traces short and away from noise sources, using a solid ground plane, and minimizing vias and layer changes.
The gain setting of the LM48820 depends on the specific application and the desired output level. A good starting point is to set the gain to the recommended value in the datasheet, and then adjust it based on the measured output level and desired signal-to-noise ratio. It's also important to consider the input impedance and output impedance of the device.
The maximum power dissipation of the LM48820 is dependent on the operating conditions, such as the supply voltage, output power, and ambient temperature. According to the datasheet, the maximum power dissipation is 2.5W, but it's recommended to derate the power dissipation based on the ambient temperature and other operating conditions.
To ensure EMC with the LM48820, it's recommended to follow general EMC design guidelines, such as using a metal shield around the device, keeping the audio signal traces away from noise sources, and using a common-mode choke or ferrite bead on the output stage. Additionally, the LM48820 has built-in EMI filtering, but it's still important to follow good EMC design practices.
The recommended input and output coupling capacitor value depends on the specific application and the desired frequency response. A good starting point is to use a 1uF to 10uF capacitor for the input and output stages, but it's recommended to experiment with different values to optimize the frequency response and noise performance.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
