CS5460A is a highly integrated power measurement solution, it on a single chip is a combination of two analog-to-digital converter (adc), high-speed power calculation function and a serial interface. It is designed to accurately measure and calculate: real (true) energy, instantaneous power, IRMS and VRMS for single phase 2 - or 3-wire power metering applications.
The CS5460A is connected to a low-cost parallel resistor or transformer to measure current and to a resistance divider or potential transformer to measure voltage. The CS5460A has a bi-directional serial interface for communication with the microcontroller and a pulse output engine whose average pulse frequency is proportional to the actual power.
Logic block diagram
The CS5460A has on-chip functionality for easy AC or DC system level calibration. The "Auto boot" feature allows the CS5460A to run "independently" and initialize itself when the system is powered on. In automatic startup mode, calibration data and startup instructions are read from the external EEPROM. In this mode, the CS5460A can be operated without a microcontroller to reduce the total bill of materials cost.
