OPA404BG datasheet by Texas Instruments

OPA404BG Frequently Asked Questions (FAQs)

• What is the recommended layout and placement for the OPA404BG to minimize noise and EMI?
  Texas Instruments recommends following good PCB layout practices, such as keeping the input and output traces short and away from each other, using a ground plane, and placing decoupling capacitors close to the op-amp. Additionally, the datasheet provides a recommended layout diagram.
• How do I choose the correct resistors for the feedback network?
  The choice of resistors depends on the desired gain, bandwidth, and noise performance. A good starting point is to use resistors with a tolerance of 1% or better, and to choose values that minimize Johnson noise. The datasheet provides a table of recommended resistor values for different gain configurations.
• What is the maximum power dissipation of the OPA404BG, and how do I calculate it?
  The maximum power dissipation of the OPA404BG is dependent on the ambient temperature and the package type. The datasheet provides a power dissipation calculation formula, which takes into account the supply voltage, output current, and package thermal resistance.
• Can I use the OPA404BG as a unity-gain buffer, and if so, what are the considerations?
  Yes, the OPA404BG can be used as a unity-gain buffer. However, it's essential to ensure that the input impedance is high enough to avoid loading the source, and to consider the output impedance and capacitive load driving capability.
• How do I handle ESD protection when using the OPA404BG?
  The OPA404BG has built-in ESD protection, but it's still important to follow proper handling and assembly procedures to prevent damage. Additionally, consider adding external ESD protection devices, such as TVS diodes, to protect the op-amp and other sensitive components.