OPA445AU datasheet by Texas Instruments

OPA445AU Frequently Asked Questions (FAQs)

• What is the recommended power supply decoupling for the OPA445AU?
  TI recommends using a 10uF ceramic capacitor in parallel with a 100nF ceramic capacitor, placed as close as possible to the power pins, to ensure stable operation.
• How do I ensure stability when using the OPA445AU in a unity-gain configuration?
  To ensure stability in a unity-gain configuration, TI recommends adding a 10-20 ohm resistor in series with the output, and a 10-100pF capacitor in parallel with the feedback resistor.
• What is the maximum capacitive load that the OPA445AU can drive?
  The OPA445AU can drive up to 1nF of capacitive load, but it's recommended to limit the capacitive load to 100pF or less to ensure stability.
• Can I use the OPA445AU in a high-temperature environment?
  The OPA445AU is rated for operation up to 125°C, but its performance may degrade at high temperatures. It's recommended to derate the device's specifications according to the temperature derating curve in the datasheet.
• How do I reduce noise and electromagnetic interference (EMI) in my OPA445AU-based design?
  To reduce noise and EMI, use a ground plane, keep signal traces short and away from noise sources, use shielding, and consider adding a common-mode choke or ferrite bead to the power supply lines.