A good PCB layout for the LM8335TLX/NOPB involves keeping the input and output traces short and separate, using a solid ground plane, and placing decoupling capacitors close to the device. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
The choice of gain resistors depends on the desired gain and bandwidth of the amplifier. A good starting point is to use the recommended values in the datasheet, and then adjust them based on the specific requirements of your application. It's also important to consider the tolerance and temperature coefficient of the resistors.
The maximum power dissipation of the LM8335TLX/NOPB is 1.4W. To ensure you don't exceed it, calculate the power dissipation based on the output current and voltage, and make sure to provide adequate heat sinking and thermal management. You can also use the thermal resistance (θJA) specified in the datasheet to estimate the junction temperature.
To filter out noise and interference, you can use a combination of passive and active filtering techniques. For example, you can use a low-pass filter at the input to remove high-frequency noise, and a high-pass filter at the output to remove low-frequency noise. Additionally, you can use shielding, grounding, and decoupling capacitors to reduce electromagnetic interference.
The recommended input impedance for the LM8335TLX/NOPB is 1kΩ to 10kΩ, and the recommended output impedance is 100Ω to 1kΩ. However, the optimal impedance values may vary depending on the specific application and requirements. It's recommended to consult the datasheet and application notes for more information.
LM8335TLX/NOPB datasheet
by Texas Instruments
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