SA9603B APPLICATION NOTE
SINGLE PHASE POWER/ENERGY METERING MODULE
n Performs both power and energy n Uses a shunt resistor for current sensing
n Operates over a wide temperature
n Meets the accuracy requirements for
Class 1 AC Watt hour meters
n Isolated SPI interface.
n Protected against ESD
n Total power consumption rating below
500mW (excluding current sensing)
The SAMES single phase power/energy metering module, the PM9603AP, provides
energy data via a isolated SPI interface.
Energy consumption is determined by the power measurement being integrated over
The method of calculation takes the power factor into account.
The output of this innovative universal power/energy meter is ideally suited for energy
calculations in applications using a micro-controller.
The application utilises the SAMES SA9603B power metering integrated circuit for power
As a safety measure, this application shows the current sensor connected to the neutral
line. In practice, the live line may be used for current sensing, provided that the supply
connections (MAINS) are reversed on the module.