Three Phase Power / Energy IC with SPI Interface SA9904B FEATURES + Bi-directional + + + + active and reactive power/energy measurement RMS Voltage and frequency measurement Individual Phase information SPI communication bus Meets the IEC 61036 Specification requirements for Class 1 AC Watt hour meters sames + + + + + + Meets the IEC 61268 Specification requirements for Class 2 VAR hour meters Protected against ESD Total power consumption rating below 60mW Uses current transformers for current sensing Operates over a wide temperature range Precision on-chip voltage reference DESCRIPTION The SAMES SA9904B is a three phase bi-directional energy/power metering integrated circuit that has been...

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