DESCRIPTION
The SAMES SA9109B Single Phase bidirectional energy metering integrated circuit has an integrated Liquid Crystal Display (LCD) driver for a 7 digit (7 segment) display as well as 4 multiple tariff registers. The SA9109B performs the active power calculation.
The method of calculation takes the power factor into account.

FEATURES
■ Performs bidirectional energy metering and directly drives a LCD with 7 digits display plus announciators
■ Programable method of energy addition
■ Pin compatible with SAMES SA9109A
■ 4 externally selectable on-chip tariff registers
■ An additional total energy register
■ Meets the IEC 521/1036 Specification requirements for Class 1 AC Watt hour meters
■ Optical interface for electronic reading according to IEC1107 Mode D
■ Pulse output for calibration
■ Power consumption rating below 40mW
■ Adaptable to different types of current sensors
■ Operates over a wide temperature range
■ Precision voltage reference on-chip
■ Protected against ESD