CA-IS3720CHS

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General Dual‐Channel Digital Isolators

The CA‐IS372xC 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 integrates Schmitt trigger to provide excellent noise immunity.   The CA‐IS3720C features two channels transferring digital signals in one direction for applications such as isolated digital I/O. The CA‐IS3721C/CA‐IS3722C 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 RS‐485, CAN etc. communication. When the input is either not powered or open‐circuit, the default output is low for devices with suffix L and high for devices with suffix H. The CA‐IS372xC devices are specified over the –40°C to +125°C operating temperature range and are available in 8‐ pin narrow‐body SOIC package (3.75kVRMS, basic isolation), 8‐pin or 16‐pin wide‐body SOIC package (5kVRMS, reinforced isolation).

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  • Features

    Data rate

    DC to 40Mbps

    Robust isolation barrier

    High lifetime: >40 years
    Up to 5kVRMS isolation rating (wide‐body packages)
    ±150kV/μs typical CMTI

    Wide supply range

    3.0V to 5.5V

    Wide operating temperature range

    –40°C to 125°C

    No start‐up initialization required

    Default output High (CA‐IS372xCH) and Low (CA‐ IS372xCL) Options

    High electromagnetic immunity

    Low power consumption

    2.6mA per channel at 1Mbps with VDDX = 5.0V
    5.2mA per channel at 40Mbps with VDDX = 5.0V

    Best in class propagation delay and skew

    22ns typical propagation delay
    3ns propagation delay skew (chip ‐to‐chip)
    1ns pulse width distortion
    20ns minimum pulse width

    Schmitt trigger inputs

    Package options


    Narrow‐body SOIC8 (S) package
    Wide‐body SOIC8‐WB (G) package
    Wide‐body SOIC16‐WB (W) package

  • Applications

    • Industrial Automation

    • Motor Control

    • Medical Systems

    • Isolated Power Supplies

    • Solar Inverters

    • Isolated ADC, DAC

  • Simplified Functional Diagram

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