OPA345NA/250 datasheet by Texas Instruments

OPA345NA/250 Frequently Asked Questions (FAQs)

• What is the maximum power dissipation of OPA345NA/250?
  The maximum power dissipation of OPA345NA/250 is 670mW. However, it's recommended to keep the junction temperature below 150°C to ensure reliability.
• How do I ensure stability when using OPA345NA/250 in a gain configuration?
  To ensure stability, it's recommended to use a gain resistor (Rg) between 1kΩ to 10kΩ, and a feedback capacitor (Cf) between 2pF to 10pF. Additionally, the layout should be designed to minimize parasitic capacitance and inductance.
• What is the recommended layout and grounding technique for OPA345NA/250?
  A star-grounding technique is recommended, where the analog and digital grounds are separated and connected at a single point. The op-amp should be placed close to the signal source, and the input traces should be kept short and shielded.
• Can I use OPA345NA/250 in a high-temperature environment?
  While OPA345NA/250 is rated for operation up to 125°C, it's recommended to derate the power dissipation and ensure proper heat sinking to prevent thermal runaway. Consult the datasheet and application notes for more information.
• How do I handle electromagnetic interference (EMI) when using OPA345NA/250?
  Use a shielded enclosure, keep the op-amp and signal traces away from noise sources, and use a common-mode choke or ferrite bead to filter out high-frequency noise. Additionally, consider using a low-pass filter or EMI filter in the signal path.