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

Before you go, we thought you'd like these...
Before you go close icon

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

NORWOOD, Mass.--(BUSINESS WIRE)-- Analog Devices, Inc. (NAS: 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.

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
Quantity

  Package  

Temperature
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. http://www.analog.com

EngineerZone is a registered trademark of Analog Devices, Inc.

To subscribe to ADI's News Feed: http://www.analog.com/en/homepage/news.xml

Follow ADI on Twitter: http://www.twitter.com/ADI_News

Subscribe to Analog Dialogue, ADI's monthly technical journal: http://www.analog.com/library/analogDialogue/



Analog Devices, Inc.
Joe Dussi, 781-937-1216
joe.dussi@analog.com
or
Porter Novelli
Andrew MacLellan, 617-897-8270
andrew.maclellan@porternovelli.com

KEYWORDS:   United States  North America  Massachusetts

INDUSTRY KEYWORDS:

The article Isolated Error Amplifiers Outperform Optocouplers and Shunt Regulators in Power Supply Applications originally appeared on Fool.com.

Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.

Copyright © 1995 - 2013 The Motley Fool, LLC. All rights reserved. The Motley Fool has a disclosure policy.

Read Full Story

Want more news like this?

Sign up for Finance Report by AOL and get everything from business news to personal finance tips delivered directly to your inbox daily!

Subscribe to our other newsletters

Emails may offer personalized content or ads. Learn more. You may unsubscribe any time.

From Our Partners