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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
BUTTONS
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 21
st
Order
Current Magnitude and Phase for All
Odd Harmonics up to 21
st
Order
The ADSST-SALEM-3T offers some excellent features that
make the final meter cost-effective and easy to manufacture.
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Inhaltsverzeichnis

Seite 1 - ADSST-SALEM-3T

Powerful Energy Meter Chipset ADSST-SALEM-3T Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no

Seite 2 - TABLE OF CONTENTS

ADSST-SALEM-3T Rev. 0 | Page 10 of 24 PIN CONFIGURATION—ADSST-218X 03738-0-009543276981D19D18D17D16IRQE+PF4IRQL0+PF5GNDIRQL1+PF6DT0TFS0SCLK0VDDEXT

Seite 3

ADSST-SALEM-3T Rev. 0 | Page 11 of 24 GENERAL DESCRIPTION OF THE ADSST-73360LAR ADC The ADSST-73360LAR is a 6-channel input analog front end proces

Seite 4

ADSST-SALEM-3T Rev. 0 | Page 12 of 24 SPECIFICATIONS—ADSST-73360LAR (AVDD = 2.7 V to 3.6 V, DVDD = 2.7 V to 3.6 V, DGND = AGND = 0 V, fMCLK = 16.384

Seite 5

ADSST-SALEM-3T Rev. 0 | Page 13 of 24 Parameter Min Typ Max Unit Test Conditions FREQUENCY RESPONSE (ADC)7 Typical Output Frequency (Norm

Seite 6

ADSST-SALEM-3T Rev. 0 | Page 14 of 24 ABSOLUTE MAXIMUM RATINGS—ADSST-73360LAR (TA = 25°C unless otherwise noted) Table 8. Parameter Rating AVDD, DVD

Seite 7

ADSST-SALEM-3T Rev. 0 | Page 15 of 24 PIN CONFIGURATION AND PIN FUNCTION DESCRIPTIONS—ADSST-73360LAR NC = NO CONNECTTOP VIEW(Not to Scale)VINP21VI

Seite 8

ADSST-SALEM-3T Rev. 0 | Page 16 of 24 Pin No. Mnemonic Function 18 SE SPORT Enable. Asynchronous input enable pin for the SPORT. When SE is set low

Seite 9

ADSST-SALEM-3T Rev. 0 | Page 17 of 24 POWER-UP INITIALIZATION AND DATA FROM THE ADSST-SALEM-3T The ADSST-SALEM-3T-EV boot loads the code from the

Seite 10 - PIN CONFIGURATION—ADSST-218X

ADSST-SALEM-3T Rev. 0 | Page 18 of 24 ACCURACY OF REFERENCE DESIGN USING THE ADSST-SALEM-3T CHIPSET Overall Accuracy, Power, and Energy Measurement T

Seite 11 - ADSST-SALEM-3T

ADSST-SALEM-3T Rev. 0 | Page 19 of 24 Table 17. Voltage Unbalance Error Current Voltage Min Typ Max Unit INVN + 15% V ±0.1 ±0.2 % Table 18.

Seite 12

ADSST-SALEM-3T Rev. 0 | Page 2 of 24 TABLE OF CONTENTS Easy Calibration... 3

Seite 13

ADSST-SALEM-3T Rev. 0 | Page 20 of 24 OUTLINE DIMENSIONS TOP VIEW(PINS DOWN)125265150757610014.00 BSC SQ0.50 BSC0.270.220.171.60 MAX12°TYP0.750.60

Seite 14

ADSST-SALEM-3T Rev. 0 | Page 21 of 24 ORDERING GUIDE Part Number1Temperature Range Processors Included Package ADSST-EM-3040 0°C to +70°C ADS

Seite 15

ADSST-SALEM-3T Rev. 0 | Page 22 of 24 NOTES

Seite 16 - DIGITAL GROUND

ADSST-SALEM-3T Rev. 0 | Page 23 of 24 NOTES

Seite 17 - VOLTAGE AND CURRENT SENSING

ADSST-SALEM-3T Rev. 0 | Page 24 of 24 NOTES © 2004 Analog Devices, Inc. All rights reserved. Trademarks and regis-tered trademarks are the property

Seite 18

ADSST-SALEM-3T Rev. 0 | Page 3 of 24 EASY CALIBRATION The ADSST-SALEM-3T chipset has highly advanced calibration routines embedded into the softwa

Seite 19

ADSST-SALEM-3T Rev. 0 | Page 4 of 24 GENERAL DESCRIPTION OF THE ADSST-218X DSP The ADSST-218x is a single-chip microcomputer optimized for digital si

Seite 20 - Rev. 0

ADSST-SALEM-3T Rev. 0 | Page 5 of 24 Efficient data transfer is achieved with the use of five internal buses: • Program Memory Address (PMA) Bus P

Seite 21 - ORDERING GUIDE

ADSST-SALEM-3T Rev. 0 | Page 6 of 24 ADSST-218X COMMON-MODE PINS Table 2. Pin Name No. of Pins I/O Function BG 1 O Bus Grant Output BGH 1 O Bu

Seite 22

ADSST-SALEM-3T Rev. 0 | Page 7 of 24 CLOCK SIGNALS Either a crystal or a TTL compatible clock signal can clock the ADSST-218x. If an external cloc

Seite 23

ADSST-SALEM-3T Rev. 0 | Page 8 of 24 ADSST-218X ELECTRICAL CHARACTERISTICS Table 4. Parameter Test Conditions Min Typ Max Unit VIH High Level Input

Seite 24

ADSST-SALEM-3T Rev. 0 | Page 9 of 24 ABSOLUTE MAXIMUM RATINGS—ADSST-218X Table 5. Rating Parameter Min Max Internal Supply Volta

Verwandte Modelle: ADSST-SALEM-3T

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