The maximum power supply voltage for the LM324N is ±18V or 36V total.
While the LM324N can be used as a comparator, it's not the best choice due to its limited slew rate and bandwidth. A dedicated comparator like the LM339 or LM2901 is recommended for comparator applications.
To ensure stability, make sure to decouple the power supply pins with capacitors (e.g., 0.1 μF and 10 μF), use a low-ESR capacitor for bypassing, and keep the layout clean and compact to minimize parasitic inductance and capacitance.
The input impedance of the LM324N is typically around 2 MΩ, but it can vary depending on the specific application and circuit configuration.
The LM324N is rated for operation up to 125°C, but its performance may degrade at high temperatures. If you need to operate in extreme temperatures, consider using a more specialized op-amp designed for high-temperature applications.