Linear Isolators

Linear Isolators 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.

PRODUCT SELECTION TABLES

Video: Replacing Optocouplers and Shunt Regulators with ADuM3190

Linear Isolators

Part#Insulation Rating (kVrms)Bandwidth -3dB (typ)Accuracy (%)Vin min (V)Vin max (V)Vout (V p-p)maxVout (V p-p)minUS Price 1000 to 4999
ADUM4190 5 kV rms 400 kHz 1 0.4 1.5 5 V p-p 400 mV p-p $1.20
ADUM3190 2.5 kV rms 400 kHz 1 0.4 1.5 5 V p-p 400 mV p-p $1.04
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