Wireless Applications

Analog Devices Expands Energy Metering Portfolio

April 22, 2008

ADE51xx and ADE55xx system-on-chip energy metering solutions increase RAM and program memory to serve more demanding global metering communications protocols.


NORWOOD, MA--(BUSINESS WIRE)-- Analog Devices, Inc. (ADI) is expanding its portfolio of market-leading energy metering solutions with the ADE51xx and ADE55xx single-chip metering devices, which are designed for the increasingly sophisticated communications networks used by today's energy markets. Globally, solid-state energy meters are replacing failure-prone electromechanical systems, which are subject to meter tampering and cannot easily support new features such as remote meter-reading and time-of-use billing. These new features and the more robust metering networks they enable are demanding greater memory density to handle the energy industry's growing data volume. Analog Devices' new SoC (system-on-chip) energy meter devices feature 62 KB of on-chip flash memory and 2 KB of RAM (random access memory), which provides more usable memory than any other available energy meter to support the program and data storage needs of advanced communications protocols in North America, Europe and emerging Asian markets.

The single-chip ADE51xx and ADE55xx metering devices integrate a proven energy measurement core, an 8051 microcontroller, a LCD (liquid crystal display) driver with contrast control, a full hardware RTC (real-time clock), two UARTs (universal asynchronous receivers-transmitters), and intelligent battery management technology. In addition to replacing six discrete ICs with a single SoC, the highly integrated metering solutions maintain accurate time, sense temperature changes, run the LCD read-out, and perform other critical system functions, all while using less than half the power of competitive solutions. In battery mode, current consumption is reduced to 1.5 µA. This 50% reduction in current consumption when the LCD is activated, as compared to other energy metering SoC solutions, is achieved through a combination of battery management techniques that allow the meter to run multiple LCD screens, maintain active temperature measurement, and keep accurate timing during power outages—all while the microcontroller remains in sleep mode. The ADE51xx differs from the ADE55xx by offering two current inputs for anti-tampering detection and billing.

"When Linyang investigated export opportunities, we realized that producing a cost-effective system required a metering SoC capable of supporting the program size necessary to implement multi-tariff tables and communication protocol while providing a solution to our low-power needs," said M. Lu, chief engineer at Chinese energy meter manufacturer, Linyang Electronics. "Analog Devices' ADE55xx and ADE51xx devices not only increase the usable program size above the current standard, they also push battery-mode functionality to new heights with an internal battery switch, a full RTC with automatic temperature curvature compensation, and four LCD screen memories with automatic scrolling. These features make the ADE55xx and ADE51xx a unique match to our metering needs."

Availability and Pricing
The ADE5169 and ADE5569 energy meters are sampling now, with full production scheduled for September 2008. The devices are available in 64-lead LQFP (low-profile quad flat-pack) packages and are priced at $3.49 per unit in 1,000-piece quantities.

Analog Devices in Energy Measurement
With more than 225 million energy meters using ADI's technology deployed worldwide, Analog Devices has delivered more energy measurement solutions than any other semiconductor company. Offering quality, reliability, and performance, Analog Devices' ADE energy metering ICs combine ADCs with fixed-function digital signal processors (DSPs) to perform critical measurements, while providing unparalleled functionality and ease-of-use. Analog Devices offers a broad range of semiconductor solutions that solve design challenges in every aspect of metering systems, including energy measurement; data and power management; user interface; and RF, GSM/GPRS, and power line carrier communication solutions. Analog Devices' ADE ICs are ideal for measuring watts (kWh), reactive energy (VAR), RMS and power quality with the highest accuracy in single-phase and polyphase revenue meters and industrial instruments. Analog Devices also offers its proprietary brand of single- and polyphase energy metering chipsets and DSP-based metering engines as complete, licensable solutions.

About Analog Devices
Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Celebrating over 40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices is headquartered in Norwood, MA, with design and manufacturing facilities throughout the world. Analog Devices' common stock is listed on the New York Stock Exchange under the ticker "ADI" and is included in the S&P 500 Index.


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