A good PCB layout for OPA4343EA/2K5 involves keeping the input and output traces short and away from each other, using a solid ground plane, and placing decoupling capacitors close to the power pins. TI provides a recommended layout in the datasheet and application notes.
The gain resistors (Rf and Rg) should be chosen based on the desired gain and bandwidth of the amplifier. TI provides a gain resistor calculator tool and application notes to help with this selection.
The maximum power dissipation of OPA4343EA/2K5 is dependent on the ambient temperature and package type. For the 2K5 package, the maximum power dissipation is approximately 1.4W at 25°C ambient temperature. See the datasheet for more information.
OPA4343EA/2K5 is specified to operate from -40°C to 125°C, but the device's performance and reliability may degrade at high temperatures. TI recommends derating the power dissipation and using thermal management techniques to ensure reliable operation.
To protect OPA4343EA/2K5 from EMI, use shielding, filtering, and grounding techniques. Place the device in a shielded enclosure, use EMI filters on the input and output lines, and ensure a solid ground plane on the PCB.