SA9122E

SA9122E SINGLE PHASE UNIDIRECTIONAL POWER/ENERGY METERING IC WITH SEPERATE 64 SEGMENT LCD DRIVER FEATURES n sames Performs unidirectional power and energy measurement On-chip 64 segment LCD driver Meets the IEC 521/1036 Specification requirements for Class 1 AC Watt hour meters Total power consumption rating below 25 mW n Adaptable to different types of current sensors Operates over a wide temperature range Different pulse rate options available for power information LCD data input via a serial interface n n n n n n DESCRIPTION The SAMES SA9122E Single Phase unidirectional active Power/Energy metering integrated circuit includes a seperate onchip 64 segment Liquid Crystal Display driver. The power/energy metering circuit generates a pulse rate output, proportional to the power consumption, while the LCD driver is programmable via a serial interface. The method of power calculation takes the power factor into account. Energy consumption is determined by the power measurement being integrated over time. The LCD driver is capable of driving 8 decimal digits (7 segment) and 8 announciators on a 4 track multiplexed backplane display. This innovative combination energy metering/ LCD display driver integrated circuit has been designed to provide meter designers with flexibility in the choice of the µ-controller employed, and is ideally suited for applications such as residential municipal metering and factory energy metering and control. The SA9122E integrated circuit is a...