ISO7821

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Highest isolation rating, dual-channel, 1/1, reinforced digital isolator

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Product details

Parameters

Integrated isolated power No Number of channels (#) 2 Forward/reverse channels 1/1 Isolation rating (Vrms) 5700 Data rate (Max) (Mbps) 100 Rating Catalog Surge voltage capability (Vpk) 12800 Current consumption per channel (DC) (Typ) (mA) 1.2 Current consumption per channel (1 Mbps) (Typ) (mA) 1.8 Operating temperature range (C) -55 to 125 Default output High, Low Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.25 Propagation delay (Typ) (ns) 10.7 open-in-new Find other Digital isolators

Package | Pins | Size

SOIC (DW) 16 77 mm² 10.3 x 7.5 SOIC (DWW) 16 178 mm² 10.3 x 17.25 open-in-new Find other Digital isolators

Features

  • Signaling Rate: Up to 100 Mbps
  • Wide Supply Range: 2.25 V to 5.5 V
  • 2.25 V to 5.5 V Level Translation
  • Wide Temperature Range: –55°C to 125°C
  • Low Power Consumption, Typical 1.8 mA per Channel at 1 Mbps
  • Low Propagation Delay: 11 ns Typical
    (5 V Supplies)
  • Industry leading CMTI(Min): ±100 kV/µs
  • Robust Electromagnetic Compatibility (EMC)
  • System-Level ESD, EFT, and Surge Immunity
  • Low Emissions
  • Isolation Barrier Life: > 25 Years
  • SOIC-16 Wide Body (DW) and Extra-Wide Body (DWW) Package Options
  • Safety and Regulatory Approvals:
    • 8000 VPK Reinforced Isolation per DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
    • 5.7 kVRMS Isolation for 1 minute per UL 1577
    • CSA Component Acceptance Notice 5A, IEC 60950-1 and IEC 60601-1 End Equipment Standards
    • CQC Certification per GB4943.1-2011
    • TUV Certification per EN 61010-1 and EN 60950-1
    • All DW Package Certifications Complete; DWW Package Certifications Complete per UL, TUV and Planned for VDE, CSA, and CQC

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Description

The ISO7821 is a high-performance, dual-channel digital isolator with 8000 VPK isolation voltage. This device has reinforced isolation certifications according to VDE, CSA, CQC, and TUV. The isolator provides high electromagnetic immunity and low emissions at low power consumption, while isolating CMOS or LVCMOS digital I/O’s. Each isolation channel has a logic input and output buffer separated by silicon dioxide (SiO2) insulation barrier. ISO7821 has one forward and one reverse-direction channel. If the input power or signal is lost, default output is ’high’ for the ISO7821 and ’low’ for the ISO7821F device. Used in conjunction with isolated power supplies, this device prevents 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 ISO7821 has been significantly enhanced to ease system-level ESD, EFT, Surge and Emissions compliance. ISO7821 is available in 16-pin SOIC wide-body (DW) and extra-wide body (DWW) packages. The DWW package option comes with enable pins which can be used to put the respective outputs in high impedance for multi-master driving applications and to reduce power consumption.

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Technical documentation

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Type Title Date
* Datasheet ISO7821x High-Performance, 8000 VPK Reinforced Dual Channel Digital Isolator datasheet (Rev. F) Mar. 24, 2016
Technical articles How to select the right digital isolator for your design Oct. 21, 2020
White paper Improve Your System Performance by Replacing Optocouplers with Digital Isolators Oct. 12, 2020
More literature TUV certificate for isolation devices (Rev. I) Mar. 14, 2020
Technical articles Isolation 101: How to find the right isolation solution for your application Feb. 11, 2020
Technical articles Why signal isolation matters in 48-V HEV/EV systems Nov. 20, 2019
More literature CSA Certification (Rev. P) Nov. 19, 2019
More literature VDE certificate for reinforced isolation for DIN VDE V 0884-11:2017-01 (Rev. N) Nov. 13, 2019
White paper Isolation in AC Motor Drives: Understanding the IEC 61800-5-1 Safety Standard (Rev. A) Sep. 19, 2019
More literature CQC Certification (Rev. F) Sep. 13, 2019
More literature UL Certification (Rev. N) Jul. 30, 2019
Technical articles Staying on budget: How digital isolators are transforming field transmitters May 24, 2019
Application note Pushing the envelope with high-performance digital-isolation technology (Rev. A) Aug. 22, 2018
Application note Digital Isolator Design Guide (Rev. B) Aug. 01, 2018
Application note Considerations for Selecting Digital Isolators Jul. 24, 2018
White paper Isolation in solar power converters: Understanding the IEC62109-1 safety standar (Rev. A) May 18, 2018
Application note How to reduce radiated emissions of digital isolators for systems with RF module Mar. 26, 2018
Application note Isolation Glossary (Rev. A) Sep. 19, 2017
Application note 4Q 2015 Analog Applications Journal Oct. 30, 2015
Application note Common-mode transient immunity for isolated gate drivers Oct. 30, 2015
Application note Pushing the envelope with high-performance digital-isolation technology Oct. 30, 2015
User guide ISO7821 EVM User's Guide Dec. 11, 2014
User guide ISO784xx Quad-Channel Digital Isolator EVM User Guide Oct. 17, 2014
White paper Understanding electromagnetic compliance tests in digital isolators Oct. 17, 2014
White paper High-voltage reinforced isolation: Definitions and test methodologies Oct. 16, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
49
Description

The ISO7842 provides galvanic isolation up to 5700 VRMS for 1 minute per UL and 8000 VPK per VDE. This device has four isolated channels comprised of a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier. Used in conjunction with isolated power supplies, this (...)

Features
  • 8000 VPK isolation per VDE0884-10 Ed 2.0
  • 5.7 kVRMS isolation for 1 minute per UL 1577
  • Signaling rate: 100 Mbps
  • Isolation barrier life: > 25 years

Design tools & simulation

SIMULATION MODEL Download
SLLM266A.ZIP (52 KB) - IBIS Model
SIMULATION MODEL Download
SLLM276B.ZIP (52 KB) - IBIS Model

Reference designs

REFERENCE DESIGNS Download
400V – 12V/500W High Frequency Resonant Converter Reference Design Using High Voltage GaN Devices
PMP20289 — The PMP20289 was built and tested to verify the performance of a high frequency (>400kHz nominal switching frequency) LLC series resonant converter (LLC-SRC) implemented with Texas Instrument’s high voltage GaN FETs under nominal (390V to 12V) voltage conversion. The digital controller (...)
document-generic Schematic
Design files
REFERENCE DESIGNS Download
Isolated GaN Driver Reference Design
TIDA-00785 — This reference design consists of a reinforced dualchannel digital isolator, a GaN gate driver, and isolated power supplies. This compact reference design is intended to control GaN in power supplies, DC-to-DC converters, synchronous rectification, solar inverters, and motor control. An open-loop (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
SOIC (DW) 16 View options
SOIC (DWW) 16 View options

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