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Fully Isolated A/D Converter Ensures Energy Meter Magnetic Immunity

NORWOOD, Mass.--(BUSINESS WIRE)-- Analog Devices, Inc., (ADI) a global leader in high-performance semiconductors for signal processing applications, today introduced the industry’s first fully isolated A/D converter designed for polyphase energy metering applications. The ADE7913 3-channel, sigma-delta A/D converter incorporates Analog Devices’ patented iCoupler® and isoPower® technologies to implement isolated signal transfer and dc-to-dc power conversion across a 5kV-rated insulation barrier. This enables the use of shunt resistor sensing elements instead of current transformers (CTs), thereby providing immunity to magnetic field interference and tampering. The use of shunts instead of CTs also reduces system cost and size.

“In the past, polyphase meter manufacturers had to decide between CT-based architectures vulnerable to external magnetic fields, or discrete component shunt-based architectures involving excessive complexity and functionality compromises,” said Ronn Kliger, director for the Energy Group, Analog Devices. “Now, with an integrated component incorporating synchronized A/D conversion and galvanic isolation, our customers can develop feature-rich, cost-effective metrology solutions that are completely immune to magnetic interference.”

ADE7913 Energy Metering IC Key Features

  • Three 24-bit isolated A/D converters: one current channel and two voltage channels
  • Integrated isoPower® isolated dc-to-dc converter
  • Up to four ADE7913 energy metering ICs synchronously clocked from a single crystal or an external clock
  • On-chip temperature sensor
  • Integrated voltage reference and voltage regulator
  • SPI serial interface

Pricing and Availability

Product

Sample
Availability

Channels

Price Each
in 1,000
Quantities

Package
ADE7913 Now

1 current channel
and 2 voltage channels

$5.71

20-lead wide body SOIC
package with greater than
8mm clearance and creepage

ADE7912 Now

1 current channel
and 1 voltage channel

$5.42

20-lead wide body SOIC package
with greater than 8mm clearance
and creepage

The EVAL-ADE7913EBZ evaluation board for the ADE7913 is now available and priced at $350.00.

ADI also recently announced an isolated metrology chipset designed for polyphase energy metering applications that provides state-of-the-art 3-phase metrology measurements and power quality monitoring. Learn about the new ADE7978 energy metering chipset at http://www.analog.com/ADE7978.

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. A leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices is included in the S&P 500 Index. http://www.analog.com

iCoupler and isoPower are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners.

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Analog Devices, Inc.
Valoree Young, 336-605-4054
valoree.young@analog.com
or
Linda Kincaid, 781-937-1472
linda.kincaid@analog.com

Source: Analog Devices, Inc.