Press Release

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Joe Dussi ,

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

Feb 26 2013 - Norwood, MA
  • 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. 

    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
     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
     -  -

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