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Reinforced, Fast, Low-Power, Two-Channel Digital Isolators

Industry's Fastest, Lowest Power Reinforced Digital Isolators

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • AEC-Q100 Qualification for /V Devices
  • Reinforced Galvanic Isolation for Digital Signals
    • 8-SOIC with 4mm of Creepage and Clearance
    • Withstands 3kVRMS for 60s (VISO)
    • Continuously withstands 445VRMS (VIOWM)
    • Withstands ±10kV Surge between GNDA and GNDB with 1.2/50µs Waveform
    • High CMTI (50kV/µs, typ)
  • Low Power Consumption
    • 0.78mW per Channel at 1Mbps with VDD_ = 1.8V
    • 1.47mW per Channel at 1Mbps with VDD_ = 3.3V
    • 3.28mW per Channel at 100Mbps with VDD_ = 1.8V
  • Low Propagation Delay and Low Jitter
    • Up to 200Mbps Maximum Data Rate
    • Low Propagation Delay 7ns (typ) at VDD_ = 3.3V
    • Clock Jitter RMS 7.5ps (typ)
  • Safety Regulatory Approvals
    • UL According to UL1577
    • cUL According to CSA Bulletin 5A
    • VDE 0884-11 Reinforced Insulation (Pending)

Applications/Uses

  • Automotive
  • Battery Management Systems (BMS)
  • Chargers
  • Hybrid Electric Vehicle
  • Inverters

Description

The MAX22290/MAX22291 is a family of 2-channel reinforced, fast, low-power digital galvanic isolators using Maxim’s proprietary process technology. All devices feature reinforced isolation for a withstand voltage rating of 3kVRMS for 60 seconds. Both automotive and general-purpose devices are rated for operation at ambient temperatures of -40°C to +125°C.

Devices with /V suffix are AEC-Q100 qualified. See the Ordering Information table for all automotive grade part numbers.

  • Industrial
  • Isolated SPI
  • Isolated RS-232, RS-485/RS-422, CAN
  • Fieldbus Communications
  • Motor Drive

These devices transfer digital signals between circuits with different power domains, using as little as 0.78mW per channel at 1Mbps (1.8V supply). The low-power feature reduces system dissipation, increases reliability, and enables compact designs.

The devices are available with a maximum data rate of 25Mbps or 200Mbps, and with outputs that are either default high or default low. They feature low propagation delay and low clock jitter, which reduces system latency. Independent 1.71V to 5.5V supplies on each side of the isolator also make the devices suitable for use as level translators.

The MAX22290 features two channels transferring data in the same direction. The two channels of the MAX22291 transfer data in opposite directions, and this makes the MAX22291 ideal for isolating the Tx and Rx lines of a transceiver.

Simplified Block Diagram

MAX22290, MAX22291: Functional Diagram MAX22290, MAX22291:Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .