A good PCB layout for the LM4871MMX/NOPB involves keeping the audio signal traces away from the power supply and ground planes, using a solid ground plane, and placing the device close to the power supply decoupling capacitors. Additionally, using a shielded enclosure and minimizing the length of the audio signal traces can help reduce EMI.
To ensure the LM4871MMX/NOPB operates within its recommended operating conditions, make sure to provide a stable power supply voltage between 2.7V and 5.5V, keep the ambient temperature within the range of -40°C to 85°C, and avoid exceeding the maximum power dissipation of 1.4W.
The recommended capacitor value for the bypass capacitor (C1) in the typical application circuit is 1uF to 10uF, with a voltage rating of at least 6.3V. A ceramic capacitor with X7R or X5R dielectric is recommended.
To troubleshoot issues with the LM4871MMX/NOPB, start by checking the power supply voltage and ensuring it is within the recommended range. Next, verify that the input signals are within the recommended amplitude and frequency range. Check for any signs of overheating, and ensure that the device is properly soldered and mounted. If the issue persists, try replacing the device or consulting the application note and datasheet for further guidance.
Yes, the LM4871MMX/NOPB can be used in a stereo audio application. To do so, use two devices, one for the left channel and one for the right channel. Ensure that the power supply and ground connections are shared between the two devices, and that the input signals are properly routed to each device.
LM4871MMX/NOPB datasheet
by Texas Instruments
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