A good PCB layout for the LM4860M involves keeping the input and output traces short and symmetrical, using a solid ground plane, and placing the decoupling capacitors close to the device. A 4-layer PCB with a dedicated power plane and a solid ground plane is recommended.
The gain resistors (Rf and Ri) should be chosen based on the desired gain and input impedance. A higher gain requires smaller resistors, while a higher input impedance requires larger resistors. The datasheet provides a gain resistor calculator to help with the selection.
The maximum power dissipation of the LM4860M is 1.4W. However, this can be limited by the thermal resistance of the package and the PCB. It's essential to ensure proper thermal management to prevent overheating.
Yes, the LM4860M can be used as a line driver. It has a high output current capability and can drive loads up to 600Ω. However, the output stage should be properly terminated to prevent reflections and ensure signal integrity.
The LM4860M has a built-in EMI filter, but additional filtering may be required depending on the application. A common-mode filter or a ferrite bead can be used to filter out high-frequency noise. A decoupling capacitor should also be placed close to the device to filter out power supply noise.
LM4860M/NOPB datasheet
by Texas Instruments
