OPA348AIDR datasheet by Texas Instruments

OPA348AIDR Frequently Asked Questions (FAQs)

• What is the maximum power dissipation of the OPA348AIDR?
  The maximum power dissipation of the OPA348AIDR is 670mW, which is calculated based on the maximum junction temperature (TJ) of 150°C and the thermal resistance (θJA) of 125°C/W.
• How do I ensure stability when using the OPA348AIDR in a high-gain configuration?
  To ensure stability, it's recommended to use a compensation capacitor (CF) between the output and the inverting input pins. The value of CF depends on the gain and bandwidth requirements of the application. A good starting point is a 10pF to 22pF capacitor.
• What is the recommended layout and grounding technique for the OPA348AIDR?
  For optimal performance, use a star-grounding technique, where the analog and digital grounds are separated and connected at a single point. Keep the input and output traces short and away from noise sources. Use a solid ground plane and decouple the power supplies with 0.1uF and 10uF capacitors.
• Can I use the OPA348AIDR in a single-supply configuration?
  Yes, the OPA348AIDR can be used in a single-supply configuration. However, the input common-mode voltage range is limited to VCC-1.5V to VCC+0.5V. To ensure proper operation, use a voltage divider or a voltage reference to set the input common-mode voltage within this range.
• How do I protect the OPA348AIDR from input overvoltage?
  Use input protection diodes (e.g., 1N4148) between the input pins and the power supply rails to prevent input voltages from exceeding the absolute maximum ratings. You can also add a series resistor to limit the input current.