ایزولاتور ایزولاتور دیجیتال

Product Attributes

Introduction

The ADuM2280/ADuM2281/ADuM2285/ADuM2286 are 5 kV rms dual-channel digital isolators based on ADI's iCoupler technology. These isolation devices integrate high-speed CMOS with monolithic air core transformer technology, offering superior performance characteristics over alternatives such as optocouplers and other integrated coupler devices. These devices feature a maximum propagation delay of 24 ns, with Grade C pulse width distortion of less than 2 ns. Grade C also provides tight channel-to-channel matching of 5 ns. The ADuM228x offers two channel configurations with three different data rates, up to a maximum of 100 Mbps. All models operate from a 2.7 V to 5.5 V supply voltage, ensuring compatibility with low-voltage systems and enabling voltage translation across the isolation barrier. Unlike other optocouplers, the ADuM228x isolators feature a patented refresh function that ensures DC correctness in the absence of input logic transitions. At initial power-up or when power has not yet been applied to the input side, the ADuM2280 and ADuM2281 default to a logic high output, while the ADuM2285 and ADuM2286 default to a logic low output.

Features

• High isolation voltage: 5000 V rms
• Data rate up to 100 Mbps
• Low propagation delay: 24 ns (maximum)
• Low dynamic power consumption
• Bidirectional communication
• 3 V to 5 V level translation
• Operating temperature up to: 125 °C
• High common-mode transient immunity: >25 kV/μs
• Default output high: ADuM2280/ADuM2281
• Default output low: ADuM2285/ADuM2286
• 16-pin wide-body SOIC package with enhanced creepage distance
• Safety and regulatory certifications (pending) UL recognition: per UL 1577, 1-minute 5,000 V rms; CSA Component Acceptance Notice #5A; IEC 60601-1: 250 V rms (reinforced); IEC 60950-1: 400 V rms (reinforced)
• VDE certified per DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12 V_IORM = 846 V peak
• Pin-compatible with ADuM220x and ADuM221x series

Applications

• General-purpose high-voltage multi-channel isolation
• Medical equipment
• Power supplies
• RS-232/RS-422/RS-485 transceiver isolation