LMH6555SQE/NOPB datasheet by Texas Instruments

LMH6555SQE/NOPB Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the LMH6555SQE/NOPB?
  Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the input and output traces as short as possible. Additionally, it's recommended to use a common mode choke or a ferrite bead to filter out high-frequency noise.
• How do I ensure the LMH6555SQE/NOPB is stable and doesn't oscillate?
  To ensure stability, make sure to follow the recommended component values and PCB layout. Additionally, it's recommended to add a 10nF to 100nF capacitor between the output and the inverting input to improve stability. Also, ensure that the gain and phase margins are sufficient by analyzing the loop gain and phase response.
• What is the maximum power dissipation of the LMH6555SQE/NOPB?
  The maximum power dissipation of the LMH6555SQE/NOPB is 1.4W. However, this can be limited by the thermal resistance of the package and the PCB. It's recommended to use a heat sink or a thermal pad to improve heat dissipation.
• Can I use the LMH6555SQE/NOPB as a unity gain buffer?
  Yes, the LMH6555SQE/NOPB can be used as a unity gain buffer. However, it's recommended to add a 10kΩ to 100kΩ resistor in series with the input to improve stability and reduce the risk of oscillation.
• How do I protect the LMH6555SQE/NOPB from ESD and overvoltage?
  To protect the LMH6555SQE/NOPB from ESD and overvoltage, it's recommended to add TVS diodes or ESD protection devices at the input and output pins. Additionally, ensure that the input and output voltage levels do not exceed the recommended maximum ratings.