Analog chips are the link between the virtual world and the real world. Unlike discrete digital signals such as time and amplitude, analog signals refer to electrical signals that vary continuously in time and amplitude. Signals in nature such as light, sound, temperature, pressure, etc. are all continuous signals, and converted into continuous electrical signals through various sensors are analog signals. According to the functional division, analog chips can be divided into two categories: power management chips and signal chain chips, which are used for power management and analog/digital signal conversion in electronic equipment systems.