ISO7721DWV

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1. Describe

The ISO7721DWV device is a high-performance dual-channel digital isolator with isolation ratings of 5000 VRMS (DW and DWV packages) and 3000 VRMS (D packages) in accordance with UL 1577. This family includes devices with reinforced insulation ratings that meet VDE, CSA, TUV and CQC. ISO7721B devices are designed for applications requiring only basic insulation ratings. The ISO7721DWV device provides high electromagnetic immunity and low emissions at low power consumption while isolating CMOS or LVCMOS digital I/O. Each isolated channel has a logic input and output buffer separated by a dual-capacitor silicon dioxide (SiO2) insulating barrier. The two channels of the ISO7720 device are oriented in the same direction, while the two channels of the ISO7721DWV device are oriented in the opposite direction. In the event of input power or signal loss, the default output is high for devices without suffix F and low for devices with suffix F. Used in conjunction with isolated power supplies, these devices help prevent noise currents on data buses such as RS-485, RS-232, and CAN from damaging sensitive circuits. Through innovative chip design and layout techniques, the electromagnetic compatibility of ISO772x devices has been significantly enhanced, simplifying system-level ESD, EFT, surge and emissions compliance. The ISO772x family of devices are available in 16-lead SOIC wide body (DW), 8-lead SOIC wide body (DWV) and 8-lead SOIC narrow body (D) packages.

2. Feature

    1. 100 Mbps data rate

    2. Robust isolation barrier:

        – Expected service life >100 years at 1.5 kVRMS operating voltage

        – Isolation class up to 5000 VRMS 

        – Surge capability up to 12.8 kV

        – ±100 kV/μs typical CMTI

    3. Wide supply range: 2.25 V to 5.5 V

    4. 2.25V to 5.5V level translation

    5. Default output high (ISO772x) and low (ISO772xF) options

    6. Wide temperature range: –55°C to +125°C

    7. Low power consumption, typically 1.7 mA per channel at 1 Mbps

    8. Low propagation delay: 11 ns typical

    9. Strong Electromagnetic Compatibility (EMC)

        – System level ESD, EFT and surge immunity

        – ±8 kV IEC 61000-4-2 contact discharge protection across isolation barrier

        – low emissions

  10. Wide SOIC (DW-16, DWV-8) and Narrow SOIC (D-8) package options

  11. Available in automotive version: ISO772x-Q1

  12. Safety related certifications:

        – DIN VDE V 0884-11:2017-01

        – UL 1577 Component Identification Program

        – CSA, CQC and TUV certification

3. Application

    1. Automation industry

    2. motor control

    3. power supply

    4. Solar inverters

    5. medical equipment

4. Pin configuration

6. Pin Description

7. Application Information

The ISO7721DWV device is a high-performance, dual-channel digital isolator. These devices use single-ended CMOSlogic switching technology. The supply voltage range for the two power supplies, VCC1 and VCC2, is 2.25 V to 5.5 V. When designing with digital isolators, keep in mind that due to the single-ended design structure, the digital Isolators do not conform to any specific interface standard and are only used to isolate single-ended CMOS or TTL digital signal lines. Isolators are typically placed between the data controller (i.e., μC or UART) and the data converter or line transceiver, regardless of interface type or standard.