CA-IS3731HN

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Triple Channel Standard Digital Isolators

The CA-IS373x devices are high-performance triple- channel digital isolators with up to 3.75kVRMS (narrow-body package) or 5kVRMS (wide-body package) isolation rating and DC to150Mbps ultra-fast data rate. The CA-IS373x devices offer high electromagnetic immunity and low emissions at low power consumption while isolating different ground domains and block high-voltage/high-current transients from sensitive or human interface circuitry. Each isolation channel has a logic input and output buffer separated by capacitive silicon dioxide (SiO2) insulation barrier, the integrated Schmitt trigger on each input provide excellent noise immunity.

The CA-IS3730 features 3 channels transferring digital signals in one direction for applications such as isolated digital I/Os. The CA-IS3731 device has 2 forward and 1 reverse-direction channels. All of the devices in this family come with enable pins which can be used to put the outputs in high impedance for multi-master driving applications to reduce power consumption. When the input is either not powered or is open-circuit, the default output is low for devices with suffix L and high for devices with suffix H, see the Ordering Information for suffixes associated with each option.

The CA-IS373x family devices are specified over the -40°C to +125°C operating temperature range. Both CA-IS3730 and CA-IS3731 are available in 16-pin SOIC narrow body package and 16-pin SOIC wide body package. Also, the CA-IS3731 provides 16-pin SSOP narrow body package.

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  • Features

    Data Date

    DC to 150Mbps

    Robust Galvanic Isolation of Digital Signals

    High lifetime: >40 years
    Up to 5000 VRMS(wide body packages) isolation rating
    ±150 kV/μs typical CMTI

    Accepts 2.5V to 5.5V Supply Range

    Wide Operating Temperature Range

    -40°C to 125°C

    Schmitt Trigger Inputs

    Enable Control Input with Internal Pull-up

    Default Output High (CA-IS373xH) and Low (CA-IS373xL) Options

    No Start-Up Initialization Required

    Low Power Consumption

    1.5mA per channel @ 1Mbps, VDD_ = 5.0V
    6.6mA per channel @ 100Mbps, VDD_ = 5.0V

    Best in Class Propagation Delay and Skew

    12ns typical propagation delay
    2ns propagation delay skew (chip -to-chip)
    1ns pulse width distortion
    5ns minimum pulse width

    Package Options

    Narrow-body SOIC16-NB(N) package
    Narrow-body SSOP16-NB(B) package
    Wide-body SOIC16-WB(W) package

    Safety Regulatory Approvals

    VDE 0884-17 isolation certification
    UL According to UL1577
    IEC 62368-1, IEC 61010-1, GB 4943.1-2011 and GB 8898-2011 certifications

  • Applications

    • Industrial Automation

    • Motor Control

    • Medical Systems

    • Isolated Power Supplies

    • Solar Inverters

    • Isolated SPI, RS485, CAN

    • Automobile

  • Device Information

    Part number Package Package size (NOM)

    CA-IS3730 

    CA-IS3731

    SOIC16-NB (N) 9.90 mm × 3.90 mm
    SOIC16-WB(W) 10.30 mm × 7.50 mm
    CA-IS3731 SSOP16-NB(B) 4.90 mm × 3.90 mm
  • Simplified Functional Diagram

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