SA9904B

*Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only. Functional operation of the device at these or any other condition above those indicated in the operational sections of this specification, is not implied. Exposure to Absolute Maximum Ratings for extended periods may affect device reliability.

The SAMES SA9904B is a three phase bi-directional energy/power metering integrated circuit that Measured values for active and reactive energy, the mains voltage and frequency for each phase are accessible through the SPI interface from 24 bit registers. The SA9904B active and reactive energy registers are capable of holding at least 52 seconds of accumulated energy at full load. A has been designed to measure active and reactive energy, RMS mains voltage and frequency. The SA9904B has an integrated SPI serial interface for communication with a micro-controller. mains voltage zero crossover is available on the F50 output.

The SA9904B includes all the required functions for threephase power and energy measurement such as oversampling A/D converters for the voltage and current sense inputs, power calculation and energy integration. This innovative universal three phase power/energy metering integrated circuit, SA9904B is ideally suited for energy calculations in applications such as electricity dispensing systems, residential metering and factory energy metering and control.

The SA9904B integrated circuit is available in 20 pin dual-inline plastic (PDIP20), as well as 20 pin small outline (SOIC20) package types.