SA2005M

Direct drive for electro-mechanical counters or stepper motors
Selectable dividing ratios for different meter rated conditions
Per phase energy direction and voltage fail indication
Precision oscillator on chip
 Meets the IEC 521/1036 Specification requirements for Class 1 AC Watt hour meters
 Operates over a wide temperature range
 Easily adaptable to different signal levels
 Precision voltage reference on chip
 Protected against ESD

The SAMES SA2005M provides a single chip active energy metering solution for three phase mechanical counter-based meter designs. Very few external components are required and it has direct drive capability for electro-mechanical counters.

The SAMES SA2005M is a CMOS mixed signal integrated circuit that performs three phase power/energy calculations over a range of 1000:1, to an overall accuracy of better than Class 1.

The integrated circuit SA2005M includes all the required functions for 3-phase power and energy measurement such as oversampling A/D converters for the voltage and current sense inputs, power calculation and energy integration. Internal offsets are eliminated through the use of cancellation procedures.

The SA2005M drives a calibration LED directly. Per phase voltage fail and voltage sequence faults as well as energy direction indication are available as LED outputs. Selectable divider ratios enable various mechanical counter or stepper motor counter resolutions.

A precision oscillator, that replaces an external crystal, is integrated on chip. A voltage reference is integrated on chip.

The SA2005M integrated circuit is available in 24-pin dual in line plastic (DIP-24) and small outline (SOIC-24) package options.