Isolated Error Amplifiers Outperform Optocouplers and Shunt Regulators in Power Supply Applications

  Isolated Error Amplifiers Outperform Optocouplers and Shunt Regulators in
  Power Supply Applications

Business Wire

NORWOOD, Mass. -- February 26, 2013

Analog Devices, Inc. (NASDAQ: ADI), a global leader in high-performance
semiconductors for signal-processing applications and a pioneer in digital
isolator technology, today introduced isolated error amplifiers that provide
power supply designers with a higher performing, single-chip alternative to
isolation techniques based on optocouplers and shunt regulators. Designed for
linear feedback power supplies using primary side controllers, the ADuM3190
and ADuM4190 isolated error amplifiers have a 400-kHz bandwidth, with 0.5%
typical initial accuracy at 25°C and 1% total accuracy over the extended
temperature range of –40˚C to +125˚C. This provides manufacturers of ac-to-dc
and dc-to-dc power supplies, including those that are DOSA (Distributed-power
Open Standards Alliance)-compliant, with a significant upgrade in speed and
operating temperature range, as well as a 5× improvement in transient

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Designed with ADI’s iCoupler® digital isolation technology, the ADuM3190 and
ADuM4190 eliminate the CTR (current-transfer ratio) of optocouplers that
degrades over the lifetime of the devices and limits operation to 85˚C. The
ADuM3190 and ADuM4190 include a highly accurate 1.225-V reference and a
wideband operational amplifier that can be used to set up a variety of
commonly used power supply loop compensation techniques.

ADuM3190/4190 Isolated Error Amplifiers Key Features

  *Bandwidth: 400 kHz
  *0.5% initial accuracy at 25°C
  *1% total accuracy over –40˚C to +125˚C
  *Low power operation: <7 mA
  *Isolation voltage:

       *ADuM3190: 2.5 kV rms
       *ADuM4190: 5 kV rms (reinforced)

Pricing and Availability

                                      Price at                     Temperature
Product            Availability   1K          Package      Range (°C)
ADuM3190A          Now            $1.04       QSOP-16      –40 to +85
ADuM3190B          Now            $1.12       QSOP-16      –40 to +85
ADuM3190S          Now            $1.14       QSOP-16      –40 to +125
ADuM3190T          Now            $1.23       QSOP-16      –40 to +125
ADuM4190A          April '13      $1.20       Wide-body    –40 to +85
ADuM4190B          April '13      $1.28       Wide-body    –40 to +85
ADuM4190S          April '13      $1.30       Wide-body    –40 to +125
ADuM4190T          April '13      $1.39       Wide-body    –40 to +125
EVAL-ADUM3190EBZ   Now            $49 per     -            -

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. 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.

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Analog Devices, Inc.
Joe Dussi, 781-937-1216
Porter Novelli
Andrew MacLellan, 617-897-8270
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