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ADSST-SALEM-3T Datasheet(PDF) 1 Page - Analog Devices |
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ADSST-SALEM-3T Datasheet(HTML) 1 Page - Analog Devices |
1 / 24 page Powerful Energy Meter Chipset ADSST-SALEM-3T Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. FEATURES High accuracy Supports IEC 60687/61036 and ANSI C12.1/12.20 Suitable for class0.5 and class0.2 meter Full four quadrant measurement of parameters SPI® compatible serial interface Pulse output with programmable pulse constant as pulses/kWh or Wh/pulse Programmable duty cycle for pulse output Embedded calibration routines for gain and dc offset Software based phase and nonlinearity compensation for current transformers 15 kHz sampling frequency UART mode enables a PC to directly access all computed parameters Flags to indicate tamper conditions Single 3.0 V supply Developer’s kit to accelerate design process (See Ordering Guide for separate ordering number.) GENERAL DESCRIPTION The ADSST-SALEM-3T energy meter chipset consists of an efficient ADSST-218x digital signal processor (DSP), a fast and accurate 6-channel, 16-bit ADSST-73360LAR sigma-delta ana- log-to-digital converter (ADC), and metering software. Two chipset versions are available to support differing ranges of operating temperature: The ADSST-EM-3040 chipset is rated at 0°C to 70°C for commercial applications, while the ADSST-EM- 3041 chipset operates at –25°C to +85°C for industrial use. µC DSP CT SMPS LCD DISPLAY RTC FLASH SPI BUS RS-232 OPTO CT CT ADC ADSST-EM-3040 RESISTOR BLOCK BOOT FLASH 03738- 0- 001 Figure 1. Block Diagram of a Functional Meter The ADC and DSP are interfaced to simultaneously acquire voltage and current samples on all three phases and to perform mathematically intensive computations to calculate various instantaneous parameters and perform harmonic analysis. The chipset can be interfaced to any general-purpose microproces- sor to develop state of the art tri-vector or polyphase energy metering solutions with a wide range of basic currents from 1 A to 30 A. By incorporating a comprehensive data set of parame- ters, including instantaneous measurements, accumulated parameters, and harmonic analysis data, the ADSST-SALEM-3T chipset meets high end energy metering requirements. The abil- ity to easily configure the chipset for various parameters makes it a very flexible solution. The phase and nonlinearity compensation for current transformers is done in software (patent pending) without having to use any passive components in the circuit for compensation, thus minimizing variations in accuracy with temperature and time. The ADSST-SALEM-3T measures and computes a large num- ber of parameters essential for high end metering. Table 1. Parameter Each Phase Total RMS Voltage RMS Current Active Power Apparent Power Inductive Reactive Power Capacitive Reactive Power Power Factor Frequency Positive Active Energy Negative Active Energy Apparent Energy Positive Inductive Reactive Energy Negative Inductive Reactive Energy Positive Capacitive Reactive Energy Negative Capacitive Reactive Energy Voltage Magnitude and Phase for All Odd Harmonics up to 21st Order Current Magnitude and Phase for All Odd Harmonics up to 21st Order The ADSST-SALEM-3T offers some excellent features that make the final meter cost-effective and easy to manufacture. |
Número de pieza similar - ADSST-SALEM-3T_15 |
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Descripción similar - ADSST-SALEM-3T_15 |
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