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CA-IS3721HS

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Dual Channel Standard Digital Isolators

The CA‐IS372x devices are high‐performance dual  ‐ channel digital isolators with up to 3.75kVRMS (narrow‐ body package) and 5kVRMS (wide‐body package) isolation rating and ultra‐fast data rate. The CA‐IS372x devices provide high electromagnetic immunity and low emissions at low power consumption, while isolating CMOS digital I/O. Each isolation channel has a logic input and output buffer separated by capacitive silicon dioxide (SiO2) insulation barrier, and each channel input integrated Schmitt trigger to provide excellent noise immunity.

The CA‐IS3720 features two channels transferring digital signals in one direction for applications such as isolated digital I/O. The CA‐IS3721/CA‐IS3722 devices have 2 channels with 1 channel in each direction, making them ideal for isolating the Tx and Rx lines of a transceiver, such as RS485, CAN etc. communication. 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.

The CA‐IS372x family are specified over the  ‐40°C to +125°C operating temperature range and are available in 8‐pin SOIC narrow body package, 8‐pin SOIC wide body package and 16‐pin SOIC wide body package.

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  • Features

    Data rate

    DC to 150Mbps

    Robust isolation barrier

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

    Wide supply range

    2.5V to 5.5V

    Wide operating temperature range

    -40°C to 125°C

    No start-up initialization required

    Default output High (CA-IS372xH) and Low (CA-IS372xL) Options

    High electromagnetic immunity

    Low power consumption

    1.5mA per channel at 1Mbps with VDD = 5.0V
    6.6mA per channel at 100Mbps with 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

    Schmitt trigger inputs

    Package options

    Narrow-body SOIC8(S) package
    Wide-body SOIC8(G) package
    Wide-body SOIC16(W) package

    Safety regulatory approvals

    VDE 0884-11 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 RS485, CAN, RS232 etc.

  • Device Information

    Part numberPackagePackage size (NOM)
    CA-IS3720
    CA-IS3721
    CA-IS3722    		SOIC8(S)4.90mm×3.90mm
    SOIC8-WB(G)5.85mm×7.50mm
    SOIC16-WB(W)10.30mm×7.50mm

  • Simplified Functional Diagram

    ca-is372x.jpg