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