The maximum power dissipation of the LM158AFKB is dependent on the ambient temperature and the package thermal resistance. According to the datasheet, the maximum power dissipation is 670mW at 25°C ambient temperature, but this can be derated to 500mW at 50°C and 330mW at 75°C.
While the LM158AFKB is an op-amp, it can be used as a comparator in certain applications. However, it's not recommended for high-speed or high-frequency comparator applications due to its limited slew rate and bandwidth. Additionally, the LM158AFKB does not have a latch or hysteresis, which are typically desirable features in a comparator.
The input impedance of the LM158AFKB is typically around 2MΩ, but this can vary depending on the specific application and operating conditions. It's recommended to use an input resistor to match the impedance of the source and minimize input bias current effects.
Yes, the LM158AFKB can be used in a single-supply configuration, but the input common-mode voltage range is limited to within 2V of the positive supply rail. Additionally, the output voltage swing will be reduced in single-supply operation, and the op-amp may not be able to swing all the way to the negative supply rail.
The LM158AFKB has a relatively high input voltage noise density of 35nV/√Hz at 1kHz, which can be a limitation in low-noise applications. However, the op-amp's noise performance can be improved by using a noise-reducing input stage or by selecting a different op-amp with better noise performance.
LM158AFKB datasheet
by Texas Instruments
