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ISOW784x Digital Isolators

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ISOW784x Digital Isolators

Texas Instruments offers the ISOW784x high-efficiency, low-emissions, reinforced digital isolators with integrated power

Image of Texas Instruments' ISOW784x Digital IsolatorsTexas Instruments' ISOW784x is a family of high-performance, quad-channel reinforced digital isolators with an integrated high-efficiency power converter. The integrated DC-DC converter provides up to 650 mW of isolated power at high efficiency and can be configured for various input and output voltage configurations. Therefore, these devices eliminate the need for a separate isolated power supply in space-constrained isolated designs. 

The ISOW784x family of devices provide high electromagnetic immunity and low emissions while isolating CMOS or LVCMOS digital I/Os. The signal-isolation channel has a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier, whereas, power isolation uses on-chip transformers separated by thin film polymer as insulating material. Various configurations of forward and reverse channels are available. If the input signal is lost, the default output is high for the ISOW784x devices and low for the devices with the F suffix.

These devices help prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry. Through innovative chip design and layout techniques, electromagnetic compatibility of the ISOW784x family of devices has been significantly enhanced to ease system-level ESD, EFT, surge, and emissions compliance. The high-efficiency of the power converter allows operation at a higher ambient temperature. The ISOW784x family of devices is available in a 16-pin SOIC wide-body (SOIC-WB) DWE package.

Features

  • Integrated high-efficiency DC-DC converter with on-chip transformer

  • 3 V to 5.5 V wide input supply range

  • Regulated 5 V or 3.3 V output

  • Up to 0.65 W output power

  • 5 V to 5 V; 5 V to 3.3 V: available load current ≥ 130 mA

  • 3.3 V to 3.3 V: available load current ≥ 75 mA

  • Soft-start to limit inrush current

  • Overload and short-circuit protection

  • Thermal shutdown

  • Default output: high and low options

  • Signaling rate up to 100 Mbps

  • Low propagation delay: 13 ns Typ (5-V Supply)

  • High CMTI: ±100 kV/µs minimum

  • 16-pin wide SOIC package


  • Robust electromagnetic compatibility (EMC)

    • System-level ESD, EFT, and surge immunity

    • Low emissions

  • Extended temperature range: -40°C to +125°C

  • Safety-related certifications:

    • 7071 VPK reinforced isolation per DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12

    • 5000 VRMS isolation for 1 minute per UL 1577

    • CSA component acceptance Notice 5A, IEC 60950-1 and IEC 60601-1 end equipment standards

    • CQC approval per GB4943.1-2011

    • TUV certification according to EN 60950-1 and EN 61010-1

    • All agency certifications are planned

Applications

  • Industrial automation

  • Motor control

  • Grid infrastructure


  • Medical equipment

  • Test and measurement


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