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

Industry's Fastest, Lowest Power Reinforced Digital Isolators

Product Details

The MAX22245/MAX22246 are a family of 2-channel reinforced, fast, low-power digital galvanic isolators using Maxim’s proprietary process technology. These devices transfer digital signals between circuits with different power domains, using as little as 0.76mW per-channel at 1Mbps (1.8V supply). All of the devices in the family feature reinforced isolation for a withstand voltage rating of 5kVRMS for 60 seconds.

The MAX22245 features two channels transferring data in the same direction. The two channels of the MAX22246 transfer data in opposite directions, and this makes the MAX22246 ideal for isolating the Tx and Rx lines of a transceiver.

Devices are available with a maximum data rate of 25Mbps or 200Mbps, and with outputs that are either default high or default low. The default is the state the output assumes when the input is either not powered or is open circuit. See the Ordering Information and Product Selector Guide for suffixes associated with each option. Independent 1.71V to 5.5V supplies on each side of the isolator also make the devices suitable for use as level translators.

The MAX22245/MAX22246 family is available in an 8-pin wide-body SOIC package with 8mm of creepage and clearance. The package material has a minimum comparative tracking index (CTI) of 400, which gives it a group II rating in creepage tables. All devices are rated for operation at ambient temperatures of -40°C to +125°C.

Key Features

  • Reinforced Galvanic Isolation for Fast Digital Signals
    • Wide-Body 8-Pin SOIC with 8mm of Creepage and Clearance
    • Up to 200Mbps Maximum Data Rate
    • Withstands 5kVRMS for 60s (VISO)
    • Continuously Withstands 1500VRMS (VIOWM)
    • Withstands ±10kV Surge Between GNDA and GNDB with 1.2/50µs Waveform
    • High CMTI (50kV/µs, typ)
  • Low Power Consumption
    • 0.76mW per Channel at 1Mbps with VDD = 1.8V
    • 1.42mW per Channel at 1Mbps with VDD = 3.3V
    • 3.2mW per Channel at 100Mbps with VDD = 1.8V
  • Options to Support a Broad Range of Applications
    • 2 Maximum Data Rates (200Mbps, 25Mbps)
    • 2 Channel Direction Configurations
    • 2 Output Default States (High or Low)

Applications/Uses

  • Fieldbus Communications for Industrial Automation
  • General Isolation Applications
  • Isolated RS232, RS485/RS422,CAN
  • Medical Systems
  • Motor Drive
Parametric specs for Digital Isolators
# Channels 2
Insulation Rating 5000VRMS
# Uni-directional Inputs (Side A) 1
# Uni-directional Inputs (Side B) 1
Uni-directional Data Rate (Mbps) (max) 200
Isolation Barrier Dual (Reinforced)
Oper. Temp. (°C) -40 to +125
Package/Pins SOIC (W) HYB/8
Budgetary
Price (See Notes)
$1.34 @1k
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Simplified Block Diagram

MAX22245, MAX22246: Functional Diagram MAX22245, MAX22246: Functional Diagram Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX22245/MAX22246 evaluation kits (EV kits) provide a proven design to evaluate the MAX22245 and MAX22246, reinforced, two-channel, galvanic digi- tal isolators. Two types of evaluation boards are available to support the MAX22245/MAX22246 family. The MAX22246CWEVKIT# is fully assembled and tested and comes populated with the MAX22246CAWA+ (Figure 1). The MAX2224XWEVKIT# is a generic board which has U1 unpopulated allowing the user to select a device from the MAX22245/MAX22246 family (Figure 2). Both evalu- ation boards support the wide-body 8-pin SOIC package type. 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+.

View Details

Features

  • Broad Range of Data Transfer Rates (from DC to 200Mbps)
  • MAX22245 with 2:0 Channel Configuration and MAX22246 with 1:1 Channel Configuration
  • 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
  • -40°C to +125° C Temperature Range
  • Proven PCB Layout

    Description

    The MAX22245/MAX22246 evaluation kits (EV kits) provide a proven design to evaluate the MAX22245 and MAX22246, reinforced, two-channel, galvanic digi- tal isolators. Two types of evaluation boards are available to support the MAX22245/MAX22246 family. The MAX22246CWEVKIT# is fully assembled and tested and comes populated with the MAX22246CAWA+ (Figure 1). The MAX2224XWEVKIT# is a generic board which has U1 unpopulated allowing the user to select a device from the MAX22245/MAX22246 family (Figure 2). Both evalu- ation boards support the wide-body 8-pin SOIC package type. 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+.

    View Details

    Features

    • Broad Range of Data Transfer Rates (from DC to 200Mbps)
    • MAX22245 with 2:0 Channel Configuration and MAX22246 with 1:1 Channel Configuration
    • 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
    • -40°C to +125° C Temperature Range
    • Proven PCB Layout

      /en/design/design-tools/ee-sim.html?

      Support & Training

      Search our knowledge base for answers to your technical questions.

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      Parameters

      Parametric specs for Digital Isolators
      # Channels 2
      Insulation Rating 5000VRMS
      # Uni-directional Inputs (Side A) 1
      # Uni-directional Inputs (Side B) 1
      Uni-directional Data Rate (Mbps) (max) 200
      Isolation Barrier Dual (Reinforced)
      Oper. Temp. (°C) -40 to +125
      Package/Pins SOIC (W) HYB/8
      Budgetary
      Price (See Notes)
      $1.34 @1k

      Key Features

      • Reinforced Galvanic Isolation for Fast Digital Signals
        • Wide-Body 8-Pin SOIC with 8mm of Creepage and Clearance
        • Up to 200Mbps Maximum Data Rate
        • Withstands 5kVRMS for 60s (VISO)
        • Continuously Withstands 1500VRMS (VIOWM)
        • Withstands ±10kV Surge Between GNDA and GNDB with 1.2/50µs Waveform
        • High CMTI (50kV/µs, typ)
      • Low Power Consumption
        • 0.76mW per Channel at 1Mbps with VDD = 1.8V
        • 1.42mW per Channel at 1Mbps with VDD = 3.3V
        • 3.2mW per Channel at 100Mbps with VDD = 1.8V
      • Options to Support a Broad Range of Applications
        • 2 Maximum Data Rates (200Mbps, 25Mbps)
        • 2 Channel Direction Configurations
        • 2 Output Default States (High or Low)

      Applications/Uses

      • Fieldbus Communications for Industrial Automation
      • General Isolation Applications
      • Isolated RS232, RS485/RS422,CAN
      • Medical Systems
      • Motor Drive

      Description

      The MAX22245/MAX22246 are a family of 2-channel reinforced, fast, low-power digital galvanic isolators using Maxim’s proprietary process technology. These devices transfer digital signals between circuits with different power domains, using as little as 0.76mW per-channel at 1Mbps (1.8V supply). All of the devices in the family feature reinforced isolation for a withstand voltage rating of 5kVRMS for 60 seconds.

      The MAX22245 features two channels transferring data in the same direction. The two channels of the MAX22246 transfer data in opposite directions, and this makes the MAX22246 ideal for isolating the Tx and Rx lines of a transceiver.

      Devices are available with a maximum data rate of 25Mbps or 200Mbps, and with outputs that are either default high or default low. The default is the state the output assumes when the input is either not powered or is open circuit. See the Ordering Information and Product Selector Guide for suffixes associated with each option. Independent 1.71V to 5.5V supplies on each side of the isolator also make the devices suitable for use as level translators.

      The MAX22245/MAX22246 family is available in an 8-pin wide-body SOIC package with 8mm of creepage and clearance. The package material has a minimum comparative tracking index (CTI) of 400, which gives it a group II rating in creepage tables. All devices are rated for operation at ambient temperatures of -40°C to +125°C.

      Simplified Block Diagram

      MAX22245, MAX22246: Functional Diagram MAX22245, MAX22246: 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