Analog Devices Solutions Bulletin ELECTRONIC ENERGY METERING

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Analog Devices Solutions Bulletin ELECTRONIC ENERGY METERING

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Instrumentation
Analog Devices Solutions Bulletin
ELECTRONIC ENERGY METERING
provides benefits. Page
16-Bit High Bandwidth ADCs: Industry's Broadest Portfolio
FREE BOOKLE center
etails.
DACs THAT SMALLER
than competitors' with even more on-chip features. Page
industry's most comprehensive selection high bandwidth 16-bit converters using both technologies. converters optimized multi-channel zero-latency applications. converters complete data acquisition solutions which require only minimum amount external anti-alias filtering. Both (AD97x) (AD772x) families feature on-board clocks references, single supplies, multiple input ranges parallel/serial interfacing. Architecture multichannel AD974: 4-channel kSPS high throughput AD976A, AD977A: kSPS cost AD976, 977: kSPS from $9.99 (10k)
POWER
kSPS
CHANNELS
Single Multi
WORLD'S FIRST FAMILY
references based XFETarchitecture. Page
high accuracy AD676, AD677: S/(N
INTERFACE
16-BIT HIGH BANDWIDTH ADCs
ARCHITECTURE
Serial Parallel
Architecture fast sampling rates (19.2 MSPS) data rates (1.2 MSPS) AD77xx family complete AD7722, AD7723 require least anti-alias filtering modulator solutions AD7720, AD7724 customized frequency responses
SMALLEST CRAFTPORT RS-232
price won't believe. Page
APPLICATIONS
automatic test equipment data acquisition communications medical motor control
APPLICATIONS
sonar radar instrumentation communications
HIGH
keeps system errors minimum. Page
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ANALOG DEVICES' SOLUTIONS BULLETINS GLANCE Power Management Communications Converters Interface Amplifiers Industrial High Speed Converters Switches/Muxes/References High Speed Linear Video/Imaging
*USD 1,000s (unless otherwise noted), recommended resale, U.S.A.
Have visited site? www.analog.com/ bulletins/instrumentation
APPLICATIONS INSTRUMENTATION PRODUCTS INCLUDED THIS BULLETIN:
automotive output span voltage digitally controlled calibration battery fuel cell charge/discharge portable instrumentation precision reference systems global positioning systems scanners thermocouple amplifiers transducer interface power medical instrumentation
Cost, Highly Accurate Power Data Converters
AD775x family power data converters offers channels sampling 16-bit resolution either continuous multiplication voltage-tofrequency conversion signals from kHz. Product-specific information available site, continuously sampling converters continuous channel multiplication fully differential bipolar inputs single supply proprietary ADCs provide stable results
APPLICATIONS
AD7750 AD7755 AD7756 precision energy meters battery fuel cell charge/discharge process monitoring pressure control cooling systems Price $2.50 Price $2.25 Price $2.10 (10k)
MULTIPLIER DIGITAL -TOFREQUENCY v(t)xi(t) WHERE: v(t) {1+cos DIGITAL -TOFREQUENCY
FOUT
INSTANTANEOUS POWER SIGNAL
INSTANTANEOUS REAL POWER SIGNAL
TIME TIME
These PFCs provide superior stability accuracy
Rail-to-Rail, Quad, 8-Bit DACs
AD7304/AD7305 quad, 8-bit DACs that operate from single supply supplies. AD7304 serial interface, while AD7305 parallel interface. Internal precision buffers swing rail-to-rail. reference input range includes supply rails allowing both positive negative full-scale output voltages. Operation guaranteed over supply voltage range consuming less than from supply. four 8-bit DACs package operation
VREF p-p,
rail-to-rail input voltage output swing reference-multiplying bandwidth compact height TSSOP-16/-20 package internal power reset (serial interface compatible) AD7304 fast parallel interface AD7305 power shutdown
AD7304 AD7305
VOUT
APPLICATIONS
automotive output span voltage instrumentation, digitally controlled calibration pin-compatible AD7226 replacement when
Price $3.25 Price $3.75
Benefits Electronic Energy Metering
utility industry slowly been increasing their familiarity with electronics over past years. This rate adoption expected quickly increase decentralization some countries deregulation others encourages customers have greater voice. consumers indirectly benefit from electronic energy meters four significant ways:
Editorial
Customer service improved through remote meter reading efficient data management. Besides having fewer questions about utility bills, consumers benefit from more efficient power distribution. Power outages detected, identified corrected more quickly customers whose meters connected network. Reducing size power generation equipment minimizes environmental disturbance pollution. Peak usage minimized, despite population growth, through multiple rate billing distribution. Cleanliness maintained monitoring power quality pollution contributed individual consumers. Consumers benefit from lower electricity bills using smart card controlled energy meters that lower operational costs providing service, reading meters processing data. Improve metering accuracy despite nonlinear loads. electromechanical meters able accurately measure energy presence phase fixed load regulation schemes popular distribution networks. Electronic measurements more robust accurate under such conditions. Many electronic components available address electronic precision energy metering sub-metering. They vary from pure analog measurement fixed-function mixed-signal products programmable processor-based
products. Electronic solutions have outperformed electromechanical meter terms functionality performance, cost reliability have been questionable different parts world. Trade-offs between cost reliability always reviewed during component selection circuit design. Analog Devices supplier military aerospace integrated circuits well very high volume consumer products well positioned marry high reliability cost that industry been waiting for. recognized cost constraints single phase energy meters identified opportunity assist meter manufacturers reach their cost targets, alleviate their reliability concerns meet their volume requirements. also recognize that technology reach cost, functionality, performance reliability goals utilities consumers fully realized, making significant strides that direction. developing family fixed-function DSPs that will address wide variation system considerations worldwide. manufacturer would choose different component from AD775x family depending upon type meter they want build. first products offered this family designed directly drive stepper motor counter. high frequency output used interface microprocessor. These will followed series products with serial port interface more efficiently communicate with microprocessor automate calibration during manufacturing. Ultimately, highly integrated product designed meet aggressive cost targets while maintaining great deal functionality close cooperation with both meter manufacturers utilities.
COMPLETE TECHNICAL INFORMATION www.analog.com/bulletins/instr umentation
BOARD SPACE MILS
World's Smallest DACs Guaranteed 12-Bit Monotonic
world's smallest DACs available SOT-23 package, which smaller than nearest competitor, includes on-chip buffer on-chip derived reference. AD5300/AD5310/AD5320 pin-compatible 12-bit DACs, operate from single supply, with serial interface that operate with clock speeds MHz. on-chip precision output amplifier allows rail-to-rail output swing, giving output range VDD. With additional external amplifier, possible achieve rail-to-rail bipolar output voltage
Part Resolution Package Current Power-Down Settling Time AD5300 bits 6-pin SOT, 8-pin SOIC 0.25
SOIC
SSOP
TSSOP
SOIC
SOT-23
PACKAGE TYPE
APPLICATIONS
AD5300 AD5310 AD5320 portable/battery powered instruments digital gain offset adjustment programmable voltage current sources programmable attenuators Price $1.25 Price $1.75 Price $2.50
AD5310 bits 6-pin SOT, 8-pin SOIC
AD5320 bits 6-pin SOT, 8-pin SOIC
Speed 1/10th Power. 12-Bit Delivers 1.75 MSPS
AD7470/AD7472 10-/12-bit pin-compatible successive approximation ADCs consume times less power than equivalent competitive devices. These externally clocked ADCs have speed power tailored 1.75 applications, consuming 1.75 with supply. They fully specified 5.25 operation consume just sleep mode. These parallel devices come 24-lead TSSOP SOIC. bits 1.75 bits 1.75 5.25 specified range
AD7472 12-BIT POWER/SPEED, 100kHz 1.7MHz
POWER
"SPEED WITH NEGLIGIBLE POWER!"
THROUGHPUT MSPS
APPLICATIONS
AD7470 AD7472 modems professional cellular radio basestations portable communications assistants telecomms test equipment scanners Price $4.50 Price $6.65
Sigma-Delta ADCs Battery Monitoring Applications
Lithium-Ion cells used portable applications primarily fact that they deliver energy very high rates, lightweight, small, provide self-contained power source easily recharged. Systems require battery monitoring during normal operation order predict remaining usage time (gas gauge) before recharge required. Voltage current need monitored during charge procedure prevent overcharge which damages cell, limiting lifetime.
Editorial
monitored during both charge discharge implement gauge facility prevent excessive charge currents during recharging. Figure shows block diagram battery monitor which includes AD7705 sigma-delta ADC, voltage regulators regulate supply voltages external multiplexer used differentially measure voltage across single battery cell.
ADG452 single-pole single-throw (SPST) switches configured differential multiplexer front measure cell voltage. Figure shows configuration measuring voltage Charge discharge Cell specified using these switches rate battery reduces variability applications. rate measurement defined system current flow rate modulation that numerically AD7705 switches. equal cell along with series rated capacity. Thus, input resistors amp-hour ADG452, form capacity cell, resistor divider rate amp. cell voltage Traditionally, order full rechargeable cells dynamic range used standard maximize charge rate 0.1C signal-to-noise rate, which required ratio. analog approximately Figure input channels hours recharge. Battery Monitoring Using AD7705 Sigma-Delta required monitoring These cells generally systems monitor need charge control currents involved both voltage current. circuit shown, were very small cell could withstand Channel monitors cell voltage while Channel overcharge conditions without affecting battery monitors charge discharge current using sense lifetime. modern applications, 16-20 hours resistor RSENSE. channel monitoring cell recharge time totally unsuitable, fast charge voltage, peak-to-peak resolution bits techniques using rates used achieved when operating gain recharge cells less than hour. update rate. These applications also require accommodate very input full-scale Fast battery charging techniques constant current signals current monitoring channel. This charging methods with high currents replace allows RSENSE kept low, thus reducing charge cells short period time undesired power dissipation application. possible. With high charging currents, charge control Another requirement ability required prevent overcharging, which accept true bipolar signals voltage destroy cell. Battery monitoring applications developed across sense resistor positive (such portable computers power tools) negative depending whether system require both cell voltage charge/discharge charge discharge mode. Operating current accurately monitored. Each cell voltage unbuffered mode with programmed gain 128, monitored ensure that maintained 9.57 full-scale signal measured with charged state provide correct operating voltage peak-to-peak resolution bits. maintain system performance. Voltage monitored during charge prevent overcharge. Current
ON/OFF SWITCH ON/OFF SWITCH CELL LITHIUM-ION CELL CELLS 3.6V-4.2V CELL CELL
ADG452
AIN1(+)
VOLTAGE REGULATORS
4.12k
BATTERY CHARGING SOURCE
REFIN
VOUT
1.225 REFERENCE
LOAD
ADG452
REFIN
AIN1(-)
4.12k
MCLKIN
MCLKOUT
AIN2(+)
RSENSE
AIN2(-)
COMPLETE TECHNICAL INFORMATION www.analog.com/bulletins/instr umentation
Selecting Right Voltage Reference
Voltage references play vital role performance accuracy analog systems. Specifying right reference applying correctly easy task. However, done properly, result superior system performance. voltage reference's overall accuracy comprised multiple electrical specifications. Below summary some specifications crucial system's overall accuracy.
Editorial
Initial Accuracy Expressed percentage volts, this deviation from nominal output voltage specified with fixed input voltage zero load current. systems where absolute measurements required, tight initial accuracy high concern. tolerance reference corresponds 0.08% absolute accuracy, which only good enough 10-bit system (1LSB ppm). Tight tolerances 0.04% achieved with AD586, AD780, REF195 while AD588 0.01%. higher accuracy required, trimming used zero initial error: however, sure recommended trim network. systems where relative rather than absolute measurements made, tight initial accuracy high importance.
drift over entire operating temperature range. From this, that poor temperature coefficient dominate tight initial accuracy. References available with ranging from with going AD588, AD688 AD586 high precision references with high resolution data-acquisition systems, especially those that must operate over wide temperature range, temperature sensitivity reference critical issue. Long-Term Stability Long-term stability accuracy over time usually specified ppm/1000 hrs. specified temperature. This difficult spec verify because long-term changes output small occur over long period time. ADR29x series references achieves excellent long-term drift ppm/1000 hrs. while other references range 15-50 ppm/1000 hrs. Systems that have long calibration cycle time, must hold their accuracy long period time, require reference with good long-term stability. Noise This important specification that often overlooked system designers. Reference voltage noise usually specified peak-to-peak value bandwidth terms wideband voltage over specified bandwidth. AD780, AD586, AD588 noise references with peak-to-peak noise voltage ranging from Vp-p Vp-p 0.1Hz-10 frequency band. noise references important highresolution systems prevent loss accuracy.
Specifying right reference applying correctly easy task. result superior system performance
Temperature Coefficient (TC) Temperature coefficient temperature drift change output voltage over specified temperature range. more commonly expressed units reference with specified over industrial temperature range, drift 2500 reference initial accuracy, accuracy
ADR29x Family: Only Choice Precision References Voltage Systems
Traditional voltage reference implementations lacking today's volt systems. Designers need devices that combine voltage power operation bandgap references with noise APPLICATIONS drift performance portable instrumentation ADR290 Price $1.95 traditional buried Zener devices. precision reference ADR291 Price $1.95 ideal voltage reference systems ADR292 Price $1.95 converter ADR293 Price $1.95 should also offer linear temperature reference coefficient, good long-term stability good thermal hysteresis. Analog Devices developed reference architecture meet needs today's voltage applications. This architecture, XFET (eXtra implanted FET), enables references with noise, supply current, improved temperature coefficient linearity thermal hysteresis. ADR290/291/292/293 series world's first family references based XFET architecture. They operate from supply rails volts draw just 2.048 (ADR290), 2.500 (ADR291), 4.096 (ADR292), 5.000 (ADR293) outputs ppm/°C temperature coefficient (typical) noise voltage typical (ADR290) SOIC-8, TSSOP-8 TO-92 3-lead packages
Industry's Highest Precision Single Supply Amplifiers
2.67k 1.33k 2.67k 150k 0.03
OPx84
2.67k 2.67k
OPx84
OPx84
VOUT
NOTCH FILTER
Functioning with single supply OP184, OP284 OP484 (single, dual, quad) highly versatile bandwidth amplifiers. Wide bandwidth, noise precision make them useful wide range applications, including jitter filters instrumentation. bandwidth offset voltage noise nV/Hz operate from volts
APPLICATIONS
OP184 OP284 OP484 battery powered instrumentation power supply control protection telecom output amplifier input buffer Price $1.50 Price $2.93 Price $5.27
COMPLETE TECHNICAL INFORMATION www.analog.com/bulletins/instr umentation
Offset Voltage, ISY; OPx62 Family Rail-to-Rail Amplifiers
INPUT OFFSET VOLTAGE
With speed fast enough high speed ADCs, power consumption enough (650 portable applications, OP162/262/462 (single/dual/quad) rail-to-rail amplifiers that combine extra speed with precise, power operation. Incredibly offset voltage noise nV/Hz also makes this family ideal precision filter applications instrumentation. offset voltage bandwidth operate from single supplies from
APPLICATIONS
Ideal precision filter applications
OP162 OP262 OP462
portable instrumentation sampling amplifier wireless LANs direct access arrangement office automation
Price $1.62 Price $2.19 Price $3.48
Protect Against Degrading Voltages with These Monitoring Devices
Sometimes, microprocessor-based systems enter state (ex: out-of-control locked-up) that detectable user. prevent damage, system must manually reset user. That both ADM811 ADM812 highly reliable voltage monitors designed detect degradation standard voltages also contain debounced manual reset input. precision voltage monitor APPLICATIONS
ADM811 microprocessor systems controllers intelligent systems Contact Factory Price
ADM811
MANUAL RESET RESET RESET
SYSTEM
100k
tiny SOT-143 package power consumption
Error-free Data Transmission kbps RS-485/RS-422 Transceivers
ADM3485E power transceiver RS-485 RS-422 communication. slewrate-limited drivers minimize afford error-free data transmission rates kbps. ADM3485E offers highest protection with power supply operation. fail-safe feature guarantees high logic output both inputs open circuit.
0.1µF
operates from single EMI/ESD robust commonmode input voltage range transceivers
RS-485/RS-422 LINK
ADM3485E
ADM3485E
APPLICATIONS
ADM3485E transceivers EMI/ESD sensitive applications telecommunications power RS-485/RS-422 transceivers
Price $1.30
power consumption makes ideal power sensitive applications
Smallest 1-Driver, 1-Receiver CRAFTPORT RS-232. it's Protected, too!
ADM101E one-driver, one-receiver, protected RS-232 that operates from single, supply. features power shutdown mode where consumption typically less than provides RS-232 compatible input/output levels using charge pump capacitors small single supply
Actual Size
ADM101E
TOUT
ROUT
protected
ADM101E
APPLICATIONS
diagnostic ports portable instrumentation receivers digital cameras Contact Factory Price
shutdown mode 10-lead SOIC package
Complete with highly efficient charge-pump voltage inverter
COMPLETE TECHNICAL INFORMATION www.analog.com/bulletins/instr umentation
Power Shutdown, High Speed These RS-232s
Good things come small packages! ADM3202, ADM3222 ADM1385 small package RS-232s that provide low, power shutdown making them ideal PDAs, digital cameras computer peripherals. Available tiny 16-lead TSSOP packages, they ideal portable applications. This series offers power shutdown capabilities. kbps power APPLICATIONS
ADM3202/3222/1385 battery powered equipment portables scanners Price $1.35
16-lead TSSOP
Aggressive pricing these interface communications drivers
Green IdleDuring periods inactivity, ADM3311E achieves low, power consumption levels (0.6 using Analog Devices' power reducing scheme Green Idle. Green Idle different from other power reduction schemes because slows down speed oscillator (which reduces consumption) also ensures that when particular driver receiver active, will ready perform peak efficiency.
Benchmark-breaking ADM3311E
Lowest Current Highest Data Rate, RS-232 Uses Green Idle Power Reduction Technique
ADM3311E three-driver/five-receiver RS-232 ideal PDAs other portable equipment, including modems, printers peripherals. operate below draws little While shutdown, receiver remains active, thereby allowing monitoring peripheral devices. This feature allows device shut down until peripheral device begins communication. ultralow power operation kbps data rate Green Idle provides peak operating efficiency 28-lead TSSOP package
RS-232 COMMUNICATIONS LINK
ADM3202/3222/1385 ADM3311E
NOTEBOOK
APPLICATIONS
ADM3311E portables notebooks
Price $1.70
Green Idle trademark Analog Devices.
World's Only Single Supply Rail-to-Rail Instrumentation Amplifier SOIC Package Just $1.55
Compared designing your amp, AD623 delivers twice accuracy, one-tenth space half price. fact, it's priced even lower than amps. performance leaves them dust. that afford performance want, it's time stop rolling your own. single supply/rail-to-rail output CMRR APPLICATIONS
AD623 power medical instrumentation transducer interface thermocouple amplifier industrial process controls Price $1.55
half error discrete designs
Twice accuracy, half price
Keeping System Errors Minimum. Cost, Instrumentation Amplifiers Demanding Industrial Applications
Whenever acquisition useful signal difficult noisy environment, monolithic amps from Analog Devices help. senses amplifies difference signal from bridge transducer (temperature, pressure, etc.) provides single-ended output, with respect reference terminal, analog-to-digital converter.
Editorial
AD620 AD623 AD627
Common-Mode Rejection Frequency
Common-Mode Rejection
Discrete Solutions
Common-mode rejection (CMR), often most important function amp, cancels signals that common both inputs while amplifying signals that differential between inputs. This function especially important rugged industrial environments where line noise associated harmonics present. High keeps system errors minimum.
Frequency
Applications that demand lower cost, less printed circuit board area, less design time, power single supply operation, present demanding challenges customers. Fortunately, Analog Devices providing more solutions expanding portfolio include features designers need respond their changing environment. more information regarding industrial products solutions, look inside this Solutions Bulletin visit site
COMPLETE TECHNICAL INFORMATION www.analog.com/bulletins/instr umentation
Worldwide Headquarters
Technology P.O. 9106 Norwood, 02062-9106 U.S.A. Tel: 4700, 5643, U.S.A. only) Fax: 8703 World Wide Site: http://www.analog.com
Micropower Instrumentation Amplifier Offers Superior Performance, Less Space, Lower Cost than Discrete Designs
AD627 integrated, micropower that provides user with excellent specifications while operating only max. delivers railto-rail output swing over very wide supply range (dual single supplies). voltage offset, offset drift, gain error, gain drift keep errors minimum users' system. Line noise, well line harmonics, will rejected since CMRR remains high 200Hz. line noise most common noise often encountered factories other harsh environments well fluorescent lights, which found almost everywhere.
Price: $2.30
Europe Headquarters
Westpark D-81373 Germany Tel: 76903-0 Fax: 76903-157
Japan Headquarters
Pier Takeshiba South Tower Building 1-16-1 Kaigan, Minato-ku Tokyo 105-6891, Japan Tel: 5402 8200 Fax: 5402 1063
Southeast Asia Headquarters
4501 West Tower Times Square Matheson Street Causeway Bay, Hong Kong Tel: 9336 Fax: 4755
AD627
APPLICATIONS
power medical instrumentation ECG, loop powered applications power data acquisition portable, battery powered instruments transducer interface
supply current CMRR single dual supply/rail-torail output offset voltage drift: input bias current
Printed U.S.A.
trademarks servicemarks properties Analog Devices, Inc., unless otherwise noted.
TECHNOLOGY P.O. 9106 NORWOOD 02062-9106
BULK RATE U.S. POSTAGE PAID Boston, Permit 55682

Analog Devices Solutions Bulletin ELECTRONIC ENERGY METERING

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