OPA404KU datasheet by Texas Instruments

OPA404KU Frequently Asked Questions (FAQs)

• What is the maximum power dissipation of the OPA404KU?
  The maximum power dissipation of the OPA404KU 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 OPA404KU in a feedback loop?
  To ensure stability, it's essential to follow proper PCB layout practices, minimize parasitic capacitance, and use a compensation capacitor (if necessary) as recommended in the datasheet. Additionally, consider using a series resistor (Rs) to isolate the op-amp input from the capacitive load.
• What is the recommended input impedance for the OPA404KU?
  The recommended input impedance for the OPA404KU is ≥1kΩ to ensure optimal performance and minimize input bias current effects. However, the input impedance can be lower if the source impedance is matched to the op-amp input impedance.
• Can I use the OPA404KU as a comparator?
  While the OPA404KU can be used as a comparator, it's not the most suitable choice due to its relatively slow slew rate (0.5V/μs) and limited output current (±20mA). A dedicated comparator like the LM339 or TLV7031 would be a better option for most applications.
• How do I protect the OPA404KU from overvoltage and ESD?
  To protect the OPA404KU from overvoltage and ESD, use a voltage clamp or a transient voltage suppressor (TVS) diode at the input pins. Additionally, follow proper PCB design practices, such as using a ground plane and minimizing trace lengths, to reduce the risk of ESD damage.