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SA2005MSA 데이터시트(PDF) 1 Page - Sames |
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1 / 12 page FEATURES + 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 sames sames Pin Selectable Three Phase Power / Energy Metering IC for Stepper Motor / Impulse Counter Applications with Anti Tamper Features SA2005M 1/12 SPEC-0115 (REV. 3) 09-05-02 + 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 DESCRIPTION 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 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. Figure 1: Block diagram REF OSC TIMING & CONTROL TEST LED VDD VSS IVN1 X IIN1 IIP1 VREF GND IVN2 X I2 V2 IIN2 IIP2 IVN3 X I3 V3 IIN3 IIP3 SELECTOR INTERFACE MON MOP PH2 PH1 PH3 PH / DIR POWER TO PULSE RATE PROGRAM- MABLE ADDER I1 V1 dr-01616 RA RE IM |
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