LMH6639MA/NOPB datasheet by Texas Instruments

LMH6639MA/NOPB Frequently Asked Questions (FAQs)

• What is the maximum power dissipation of the LMH6639MA/NOPB?
  The maximum power dissipation of the LMH6639MA/NOPB is 1.4W, which is calculated based on the maximum junction temperature (TJ) of 150°C and the thermal resistance (θJA) of 57.1°C/W.
• How do I ensure stability when using the LMH6639MA/NOPB in a high-gain configuration?
  To ensure stability, it's recommended to use a compensation capacitor (CC) between the output and the inverting input pins. The value of CC depends on the gain and bandwidth requirements, but a typical value is around 10-22pF.
• What is the recommended layout and routing for the LMH6639MA/NOPB to minimize noise and oscillations?
  To minimize noise and oscillations, it's recommended to use a star-ground configuration, keep the input and output traces short and symmetrical, and avoid running sensitive traces near the op-amp's power pins. Additionally, use a solid ground plane and decouple the power supplies with 0.1uF and 10uF capacitors.
• Can I use the LMH6639MA/NOPB as a unity-gain buffer?
  Yes, the LMH6639MA/NOPB can be used as a unity-gain buffer. However, it's recommended to add a small resistor (around 10-20 ohms) in series with the output to improve stability and reduce the risk of oscillations.
• How do I handle ESD protection when using the LMH6639MA/NOPB?
  The LMH6639MA/NOPB has internal ESD protection, but it's still recommended to follow proper ESD handling procedures during assembly and testing. Additionally, consider adding external ESD protection devices, such as TVS diodes, to protect the op-amp from external ESD events.