The maximum power dissipation of the OPA140AIDGKT is 670mW, which is calculated based on the maximum junction temperature (TJ) of 150°C and the thermal resistance (θJA) of 125°C/W.
To ensure stability in a unity-gain configuration, it's recommended to add a capacitor (typically 10-100pF) between the output and the inverting input to compensate for the op-amp's internal capacitance and ensure stability.
To minimize noise and EMI, it's recommended to keep the input and output traces short and away from each other, use a ground plane, and avoid running sensitive traces near the op-amp's power pins. Additionally, decoupling capacitors should be placed close to the op-amp's power pins.
The OPA140AIDGKT is rated for operation up to 125°C, but its performance may degrade at higher temperatures. If operation above 125°C is required, a different op-amp or additional cooling measures may be necessary.
When choosing resistors for the feedback network, consider the op-amp's input impedance, output impedance, and desired gain. Use resistors with low tolerance (e.g., 1%) and temperature coefficient (e.g., 25ppm/°C) to ensure stable operation.
OPA140AIDGKT datasheet
by Texas Instruments
