LM4665ITL/NOPB datasheet by Texas Instruments

LM4665ITL/NOPB Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the LM4665ITL/NOPB?
  Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general best practices for audio circuit board design, such as separating analog and digital grounds, using a star-ground configuration, and minimizing trace lengths and loops.
• How do I ensure the LM4665ITL/NOPB is stable and doesn't oscillate?
  To ensure stability, make sure to follow the recommended component values and PCB layout, and also consider the output impedance of the amplifier. Additionally, adding a small capacitor (e.g. 10nF) between the output pin and ground can help to reduce oscillations.
• What is the maximum power dissipation of the LM4665ITL/NOPB?
  The maximum power dissipation of the LM4665ITL/NOPB is dependent on the ambient temperature and the thermal resistance of the package. According to the datasheet, the maximum power dissipation is 1.4W at 25°C ambient temperature. However, it's recommended to derate the power dissipation based on the actual operating conditions.
• Can I use the LM4665ITL/NOPB in a stereo audio application?
  Yes, the LM4665ITL/NOPB can be used in a stereo audio application by using two devices, one for each channel. However, it's important to ensure that the power supply and ground connections are properly decoupled and isolated to prevent crosstalk and noise.
• What is the recommended input impedance for the LM4665ITL/NOPB?
  The recommended input impedance for the LM4665ITL/NOPB is 10kΩ or higher. This ensures that the amplifier can drive the input capacitance and provides a stable gain.