Analog Devices Press Release - October 21, 2010
Analog Devices Introduces Digital Isolator with Integrated Transformer Driver and PWM Controller
- New iCoupler® digital isolation products enable isolated dc-to-dc converter to provide up to 2 watts of
regulated and isolated power, reduce board space by up to 30 percent, and simplify development of
requiring isolated data and power.
NORWOOD, Mass.--(BUSINESS WIRE)--
Analog Devices, Inc., a global leader in high-performance semiconductors for signal-processing applications,
today introduced the industry™s first digital isolator with an integrated transformer driver and PWM (pulse-width
modulation) controller in a single package. The integration of these components into a small, surface mount
20-lead SSOP (shrink small outline package) enables the new four-channel digital isolator to reduce board space by
up to 30 percent and achieve cost reductions of 10 percent while simplifying the development of systems requiring
isolated data and power. The product enables designers to implement an isolated dc-to-dc converter that provides
up to 2 watts of regulated, isolated power at 3.3 V to 30 V from a 5.0-V input supply or 3.3-V supply. Analog
Devices™ new ADuM347x digital isolators are ideal for applications that require isolated data and isolated power,
including data acquisition, industrial process control using Fieldbus, and building control.
Watch a video on the ADuM347x digital isolators.
The new devices expand ADI™s
iCoupler digital isolation portfolio, which provides the most extensive range of isolation technology in the
industry. The ADuM347x isolators, along with other products in the portfolio, enable designers to implement
isolation in their designs without the cost, size, power, performance, and reliability constraints found with
traditional isolation products, such as optocouplers.
About the ADuM347x Four-Channel Digital Isolators
The ADuM347x four-channel digital isolators include the
ADuM3474 products. These four-channel products provide four independent data isolation channels in various
channel configurations and data rates up to 25 Mbps. Each device also provides a transformer driver and PWM
controller with isolated feedback to provide a regulated output with up to 70 percent efficiency. The ADuM347x
also offers 2500-V rms isolation using ADI™s patented iCoupler digital isolation technology.
EVAL-ADuM3471EBZ evaluation board is comprised of two independent and isolated dc-to-dc converter circuits
that demonstrate single and double supply applications for the ADuM347x digital isolators. The dc-to-dc converter
switching frequency may be adjusted within the range of 200 kHz to 1 MHz. The board also supports a variety of I/O
configurations to allow easy evaluation of the ADuM347x devices.
Availability, Pricing and
Complementary components for the ADuM347x family include the AD5422 DAC (digital-to-analog converter) and the
following 24-bit sigma-delta ADCs (analog-to-digital converters): AD7190, AD7191, AD7192, AD7193, AD7194, and
With more than 450 million channels deployed, ADI™s proven
iCoupler technology is based on chip-scale transformers, rather than on the LEDs and photodiodes found in
optocouplers. Transformers support higher data rates, consume less power, and are more stable over life as
compared to LEDs and photodiodes. By fabricating the transformers directly on-chip using wafer-level processing,
iCoupler channels can be integrated with each other and other semiconductor functions at low cost. iCoupler
transformers are planar structures formed from CMOS and gold metal layers. A high breakdown polyimide layer
underneath the gold layer insulates the top transformer coil from the bottom resulting in the most reliable and
highest level of digital isolation available. CMOS circuits connected to the top coil and bottom coil provide the
interface between each transformer and its external signals.
About Analog Devices, Inc.
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
technologies, 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 for
analog- and digital-signal processing applications, Analog Devices is headquartered in Norwood, Massachusetts,
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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Analog Devices, Inc.
Date Posted 10/22/2010