SA9903B

Single Phase Power / Energy IC with SPI Interface SA9903B + FEATURES + Bi-directional active + + + and reactive power/energy measurement RMS Voltage and frequency measurement SPI communication bus Meets the IEC 521/1036 Specification requirements for Class 1 AC Watt hour meters sames + + + + + + Meets the IEC 1268 Specification requirements for VAR hour meters Protected against ESD Total power consumption rating below 25mW Adaptable to different current sensor technologies Operates over a wide temperature range Precision voltage reference on-chip DESCRIPTION The SAMES SA9903B is a single phase bi-directional energy/power metering integrated circuit that performs measurement of active and reactive power, mains voltage and mains frequency. The SA9903B is pin compatible to the SA9603B. New features include, RMS mains voltage and accurate reactive power measurements. Measured values for active and reactive energy, the mains voltage and frequency are accessible through a SPI bus from 24 bit registers. This innovative universal single phase power/energy metering integrated circuit is ideally suited for energy calculations in applications such as electricity dispensing systems (ED's), residential municipal metering and factory energy metering and control. TheSA9903B integrated circuit is available in both 20 pin dualin-line plastic (DIP-20), as well as 20 pin small outline (SOIC20) package types. TEST VDD VSS ACTIVE IIP IIN CURRENT ADC REACTIVE SPI IVP RMS VOLTAGE VOLTAGE ADC ...