Metrology Chipset ensures energy meter magnetic immunity.October 8, 2012 -
Able to compute active, reactive, and apparent energies for class 0.5 meters, ADE7978 chipset consists of ADE7978, 3-phase metrology IC combined with up to 4 ADE7933, 3-channel, sigma-delta, fully isolated ADC ICs. Latter incorporates iCoupler® and isoPower® technologies to implement isolated signal transfer and DC/DC power conversion across 5 kV-rated insulation barrier, enabling use of shunt resistor sensing elements to provide immunity to magnetic field interference and tampering.
Analog Devices' Isolated Metrology Chipset Ensures Energy Meter Magnetic Immunity
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Analog Devices Inc
1 Technology Way, P.O. Box 9106
Norwood, MA, 02062
Press release date: October 1, 2012
NORWOOD, Mass. -- Analog Devices, Inc., (ADI) a global leader in high-performance semiconductors for signal processing applications, today introduced the industry’s first fully isolated metrology chipset designed for polyphase energy metering applications. The ADE7978 metrology chipset includes the ADE7978 3-phase metrology IC combined with up to four ADE7933 fully isolated A/D converter ICs. The ADE7933 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.
• View the ADE7978 energy metering chipset product page, order samples, and download the data sheet: http://www.analog.com/ADE7978.
“Designers of 3-phase electric meters are increasingly adopting shunt-based architectures over traditional CT-based meters to take advantage of size, cost, and magnetic immunity benefits,” said Ronn Kliger, director, Energy Group, Analog Devices. “This new full-featured metrology chipset allows them to quickly leverage these benefits without compromising functionality or performance.”
Energy Metering Chipset Key Features
• Computes active, reactive, and apparent energies for class 0.5 meters (ADE7978)
• Provides comprehensive power quality measurements including THD (ADE7978)
• Two versions of A/D converter IC available: three channel (ADE7933) and two channel (ADE7932)
• Integrated isoPower isolated dc-to-dc converter (ADE7933/ADE7932)Enables real time compensation for shunt temperature drift using on-chip temperature sensors (ADE7978 and ADE7933/ADE7932)
• Flexible SPI, I2C, and HSDC serial interfaces (ADE7978)
Pricing and Availability
| Product || Sample Availability || Channels || Price Each In 1,000 Quantities || Packaging |
| ADE7978 3-phase metrology IC || Now || N/A || $1.90 || 28-Pin LFCSP |
| ADE7933 3-channel isolated ADC || Now || 1 current channel and 2 voltage channels || $5.71 || 20-lead wide body SOIC with greater than 8mm clearance and creepage |
| ADE7932 2-channel isolated ADC || Now || 1 current channel and 1 voltage channel || $5.42 || 20-lead wide body SOIC with greater than 8mm clearance and creepage |
The EVAL-ADE7978EBZ evaluation board for the ADE7978 energy metering chipset is now available and priced at $350.00.
ADI also recently introduced the industry’s first fully isolated A/D converter designed for polyphase energy metering applications. The new ADE7913 IC is similar to the ADE7933, but with an SPI interface for customers who prefer to implement their own metrology algorithms to realize the same magnetic immunity, cost, and size benefits as the chipset. Learn about the ADE7913 energy metering IC at http://www.analog.com/ADE7913.
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 SP 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
Analog Devices, Inc.
Linda Kincaid, 781-937-1472