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

Tue Feb 26, 2013 2:00am EST

* Reuters is not responsible for the content in this press release.

NORWOOD, Mass.--(Business Wire)--
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 response.

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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

 Product               Availability      Price at 1K      Package              Temperature  
                                         Quantity                              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 SO-16      -40 to +85   
 ADuM4190B             April '13         $1.28            Wide-body SO-16      -40 to +85   
 ADuM4190S             April '13         $1.30            Wide-body SO-16      -40 to +125  
 ADuM4190T             April '13         $1.39            Wide-body SO-16      -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

Copyright Business Wire 2013

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