The maximum power dissipation of the TL084ACD is 1.4W, which is calculated based on the maximum junction temperature (TJ) of 150°C and the thermal resistance (RθJA) of 90°C/W.
While the TL084ACD is rated for operation up to 70°C, it's not recommended for use in high-temperature environments above 85°C. For high-temperature applications, consider using a more suitable op-amp like the TLV084 or OPAx084.
To ensure stability in a unity-gain configuration, add a 10-22nF capacitor between the output and the inverting input (pin 2) to prevent oscillations. This is especially important when using the TL084ACD with high-impedance sources or long cables.
For optimal performance, use a star-grounding technique, where the grounds of the power supplies, analog circuits, and digital circuits are connected at a single point. Keep the layout compact, and use a ground plane to minimize noise and electromagnetic interference (EMI).
While the TL084ACD can be used as a comparator, it's not the best choice due to its relatively slow slew rate (0.5V/μs) and limited bandwidth (3MHz). For comparator applications, consider using a dedicated comparator like the LM339 or TLV7031.
TL084ACD datasheet
