ahttp://www.analog.com/energymeter/

Energy Metering IC’sQuality you can trust.

Analog Devices Energy Metering Products

AD775x

Visit our website for samples, datasheets, and additional product information.a

Analog Devices Superior QualityAll integrated circuits (IC) manufactured by Analog Devices endure a strict qualification process to ensure highquality of our end products. Extensive qualification processes are carried out in fabrication, assembly and end-product stages. To ensure consistent quality of our products, production samples are constantly drawn for reliabil-ity testing and failure analysis. Additionally, the results provided by our world-class Products Analysis Group oncustomer returns and device qualification failures help trigger continuous product/process improvements world-wide.

Did You Know?Analog Devices regularly performs tests that are tailored to our products’ specific applications. For example, to answerour customers’ question on the expected lifespan of solid-state energy meters, our AD7755 was tested and passed3,000 hours accelerated life test (HTOL to 125°C), an equivalence of 60 years lifespan! This study clears miscon-ceptions that a solid-state energy meter IC might have a short expected lifespan.

Passed

· Fabrication & assembly qualification· Electrical static discharge (ESD)· Latch up

· Time dependent dielectric breakdown· Electromigration· Hot carrier injection· Electrical endurance – HTOL & LTOL· Early life failure characterization· High temperature storage· Moisture endurance test· Die shear test

· Bond strength· Burn-in sequence· Constant acceleration· Hermeticity· High temperature storage· Internal water vapor test· Lead fatigue· Lid torque· Marking permanency· Mechanical shock· Moisture sensitivity characterization· Moisture endurance sequence & autoclave· Resistance to soldering heat· Solderability· Thermal impedance· Thermal shock sequence· Temperature cycling sequence· Vibration, variable frequency· X-ray Inspection

FabricationQualification

AssemblyQualification

End-ProductQualification

ProductionQuality Control

CustomerFeedback

ApplicationSpecific

Qualification

SUPPLEMENTALQUALIFICATIONS

CORPORATESTANDARD

QUALIFICATIONS

LIST OFQUALIFICATIONS

Passed

ahttp://www.analog.com/energymeter/

The qualification process is simply the very first step taken to ensure our quality and reliability. To ensure ourproducts meet the highest quality standard, Analog Devices constantly monitors the finished products. The plotbelow shows the quarterly failure rate in parts per million (ppm). Please note that the electrical ppm failure islargely comprised of marginal parametric rejects. In other words, these rejects are fully functional but are morelikely to experience early failure in the field. As you can see, the consistent rate reflects the stability of ourprocess. The low ppm rate also directly reflects the quality of the products our customers received. The low failureppm ensures the products our customers receive have virtually zero defects and low probability of early failure inthe field. Analog Devices’ Product Analysis Group works directly with customers on quality issues and providerapid responses to customers through correlation, analysis and corrective actions.

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Analog Devices Energy Measurement Performance

AD7755 is the core of our AD775x family and is the product of choice for many meter manufacturers around theworld. It provides unsurpassed accuracy of watt calculation over a very wide dynamic range. The plots belowhighlight the performance of AD7755 over a dynamic range of 1000:1 and temperature range of –40°C to 85°C.Even at low power factor (PF=0.5), as shown on the plot on the right, AD7755 maintains its accuracy.

Amps

-0.50.01 0.1

% E

RR

OR

-0.4

-0.3

-0.2

-0.1

0.0

0.1

0.2

0.3

0.4

0.5

1 10 100

+25 �C

+85 �C

- 40 �C

PF = 1GAIN = 16ON-CHIP REFERENCE

Amps0.01 0.1

% E

RR

OR

-0.8

-0.6

-0.2

-0.4

0.0

0.2

0.4

1 10 100

- 40 �C PF = 0.5

-1.0

+25 �C PF = 1

+25 �C PF = 0.5

+85 �C PF = 0.5

PF = 0.5GAIN = 16ON-CHIP REFERENCE

Did You Know?The quality of the product you receive depends on the overall failure rate of the lot that the part comes from. The lowerthe failure rate of the lot, the better the quality of the product. The consistently low failure rate from Analog Devices’manufacturing process shows the reliability of our products. For the latest ppm data, as well as further details on AnalogDevices’ quality system, visit the Quality Systems link in our corporate web site at http://www.analog.com/.

Visit our website for samples, datasheets, and additional product information.a

Another main reason why many manufacturers choose AD7755 is itsease of use. A single calibration point, typically at Ib (basic current),is all that is needed to calibrate the meter. The AD7755 needs asingle 5V voltage supply, and it provides direct drive capability to amechanical counter. The AD7755 can also interface with very lowresistance shunt. The circuitry needed for a meter is very simple.Shown on the right is our solid-state watt-meter reference design. Thefull documentation of this meter, Application Note AN-559, can befound in our web site. The reference design is provided to help ourcustomer shorten the design cycle. Please visit our web site forfurther details.

WORLDWIDE HEADQUARTERSOne Technology Way, P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A.

Tel: (781) 461-3060 • Fax: (781) 461-4360 • World Wide Web Site: http://www.analog.com

EUROPE HEADQUARTERSAm Westpark 1-3D-81373 Munchen,GermanyTel: 49-89-76903-0Fax: 49-89-76903-157

JAPAN HEADQUARTERSNew Pier Takeshiba, South Tower Building1-16-1 Kaigan, Minato-ku,Tokyo 105-6891, JapanTel: 81-3-5402-8200Fax: 81-3-5402-1063

ADSPADSP--2185L 2185L Single chip 3.3V DSP Microcomputer

AD73360AD73360 Six 16 bit Σ−∆ ADCs

AD73360LAD73360L Low power AD73360

AD7758AD7758 AD7754 + Reactive Power

ADuC812 ADuC812 8ch, 12 bit ADC, Flash, 8052

ADuC812SBRU ADuC812SBRU ADuC812 Pin Count Reduction

AD7754AD7754 AD7756 with Six Input Channels

AD7756AD7756 AD7755 with SPI(Serial Port Interface)

AD7759AD7759 AD7756 with di/dt Input

AD7753AD7753 AD7756 + Reactive Power

AAAADDDD77777777AAAADDDD777777775555555555555555 Core AD775X product with Motor Drive

AD7751AD7751 AD7755 + Fault Tolerance

AD7757AD7757 AD7755 + Integrated Oscillator

AD7752AD7752 AD7751 + Digital Calibration

Product IntroductionsProduct Introductions Vs.Vs. Integrated Circuit FunctionalityIntegrated Circuit Functionality

3 Phase3 PhaseWatts

3 Phase3 PhaseMultipleFunction

1 Phase1 PhaseMCU-Based

Design

1 Phase1 PhaseSingle Chip

Design

PrePre--20012001 20012001 PostPost--20012001

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SOUTHEAST HEADQUARTERS4501 Nat West Tower, Times SquareCauseway Bay,Hong KongTel: (852) 2506-9336Fax: (852) 2506-4755

Energy Measurement ICs: Now and the Future

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