The maximum power dissipation of the TL082ACDR is 670mW, which is calculated based on the maximum junction temperature (TJ) of 150°C and the thermal resistance (θJA) of 125°C/W.
While the TL082ACDR is rated for operation up to 125°C, it's essential to consider the derating of the maximum power dissipation with temperature. Above 85°C, the maximum power dissipation decreases, and the device may not operate within specifications.
To ensure stability, follow proper PCB layout practices, use a low-ESR capacitor (e.g., ceramic or film) for decoupling, and consider adding a noise-reducing capacitor (e.g., 10nF to 100nF) between the output and the inverting input. Additionally, ensure the circuit is properly bypassed and the op-amp is not oscillating.
Keep the input and output traces short and separate, avoid crossing signal traces, and use a ground plane to minimize noise. Place decoupling capacitors close to the op-amp, and use a star-grounding configuration to reduce noise and ensure stability.
While the TL082ACDR can be used as a comparator, it's not the most suitable choice due to its relatively slow slew rate (13V/μs) and limited bandwidth (3MHz). Consider using a dedicated comparator or a faster op-amp for comparator applications.