MAX22291

RECOMMENDED FOR NEW DESIGNS

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

Industry's Fastest, Lowest Power Reinforced Digital Isolators

Data Sheet (Rev. 3) Product Selection Table
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Overview

  • 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)

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.

Applications

  • Automotive
  • Battery Management Systems (BMS)
  • Chargers
  • Hybrid Electric Vehicle
  • Inverters
MAX22291
Reinforced, Fast, Low-Power, Two-Channel Digital Isolators
MAX22290, MAX22291:Functional Diagram
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Documentation

Data Sheet 1

Safety and Regulatory Compliance 1

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Tools & Simulations

IBIS Model 1

Evaluation Kits

eval board
schematic 1
MAX2229XSEVKIT

Evaluation Kit for the MAX22245/MAX22246/MAX22290/MAX22291

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Features and Benefits

  • Broad Range of Data Transfer Rates (from DC to 200Mbps)
  • MAX22245 and MAX22290 with 2:0 Channel Configuration, MAX22246 and MAX22291 with 1:1 Channel Configuration
  • Support Both Narrow SOIC Package and Wide SOIC Package
  • SMA Connectors for Easy Connection to External Equipment
  • Wide Power Supply Voltage Range from 1.71V to 5.5V
  • Guaranteed up to 5kVRMS Isolation for 60s (MAX2224XW)
  • Guaranteed up to 3kVRMS Isolation for 60s (MAX2229XS)
  • -40°C to +125° C Temperature Range
  • Proven PCB Layout

Product Details

The MAX22245/MAX22246/MAX22290/MAX22291 evaluation kits (EV kits) provide a proven design to evaluate the MAX22245, MAX22246, MAX22290 and MAX22291, reinforced, two-channel, galvanic digital isolators. Three types of evaluation boards are available to support this family of isolators. The MAX22246CWEVKIT# is fully assembled and tested and comes populated with the MAX22246CAWA+ (Figure 1). The MAX2224XWEVKIT# is a generic board which has unpopulated wide SOIC footprint as U1, allowing the user to install any MAX22245/ MAX22246 variant (Figure 2). The MAX2229XSEVKIT# is a generic board which has unpopulated narrow SOIC footprint as U1, allowing the user to install any MAX22290/ MAX22291 variant (Figure 3). Among the three evaluation boards, devices with either wide-body 8-pin SOIC package or narrow-body 8-pin SOIC package are supported. See Table 1 for EV kit options.

The EV kits should be powered from two independent isolated power supplies with nominal output voltage in range from 1.71V to 5.5V. For evaluating the electrical parameters of the device without any isolation between the two sides, a single power supply can also be used.

The MAX2224XWEVKIT# comes with U1 unpopulated and supports the following digital isolators: MAX22245BAWA+, MAX22245CAWA+, MAX22245EAWA+, MAX22245FAWA+, MAX22246BAWA+, MAX22246CAWA+, MAX22246EAWA+, MAX22246FAWA+, MAX22245BAWA/V+, MAX22245CAWA/V+, MAX22245EAWA/V+, MAX22245FAWA/V+, MAX22246BAWA/V+, MAX22246CAWA/V+, MAX22246EAWA/V+, MAX22246FAWA/V+.

The MAX2229XSEVKIT# comes with U1 unpopulated and supports the following digital isolators: MAX22290BASA+, MAX22290CASA+, MAX22290EASA+, MAX22290FASA+, MAX22291BASA+, MAX22291CASA+, MAX22291EASA+, MAX22291FASA+, MAX22290BASA/V+, MAX22290CASA/V+, MAX22290EASA/V+, MAX22290FASA/V+, MAX22291BASA/V+, MAX22291CASA/V+, MAX22291EASA/V+, MAX22291FASA/V+.

Note: When ordering the MAX2224XW EV kit, request a sample of the desired MAX22245 or MAX22246 isolator IC that can be soldered to the PCB. When ordering the MAX2229XS EV kit, request a sample of the desired MAX22290 or MAX22291 isolator IC that can be soldered to the PCB.

Applications

  • Fieldbus Communications for Industrial Automation
  • General Isolation Applications
  • Isolated RS232, RS485/RS422,CAN
  • Medical Systems
  • Motor Drive
MAX2229XSEVKIT
Evaluation Kit for the MAX22245/MAX22246/MAX22290/MAX22291
MAX2229XSEVKIT

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