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ISO7821

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ISO7821

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Rating Catalog Integrated isolated power No Number of channels 2 Forward/reverse channels 1 forward / 1 reverse Data rate (max) (Mbps) 100 Protocols GPIO, PWM, UART Propagation delay time (typ) (ns) 10.7 Propagation delay time (max) (ns) 16 Part-to-part output skew (max) (ns) 4.5 Channel-to-channel output skew (max) (ns) 2.5 Certifications CQC, CSA, DIN, TUV, UL Isolation rating Reinforced Withstand isolation voltage (VISO) (Vrms) 5700 Surge isolation voltage (VIOSM) (kVPK) 12.8 CMTI (min) (kV/µs) 85 Default output High, Low Creepage (min) (mm) 8, 14.5 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 Transient isolation voltage (VIOTM) (VPK) 8000 Clearance (min) (mm) 8, 14.5
Rating Catalog Integrated isolated power No Number of channels 2 Forward/reverse channels 1 forward / 1 reverse Data rate (max) (Mbps) 100 Protocols GPIO, PWM, UART Propagation delay time (typ) (ns) 10.7 Propagation delay time (max) (ns) 16 Part-to-part output skew (max) (ns) 4.5 Channel-to-channel output skew (max) (ns) 2.5 Certifications CQC, CSA, DIN, TUV, UL Isolation rating Reinforced Withstand isolation voltage (VISO) (Vrms) 5700 Surge isolation voltage (VIOSM) (kVPK) 12.8 CMTI (min) (kV/µs) 85 Default output High, Low Creepage (min) (mm) 8, 14.5 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 Transient isolation voltage (VIOTM) (VPK) 8000 Clearance (min) (mm) 8, 14.5
SOIC (DW) 16 106.09 mm² (10.3 mm × 10.3 mm) SOIC (DWW) 16 177.675 mm² (10.3 mm × 17.25 mm)
  • Signaling Rate: Up to 100Mbps
  • Wide Supply Range: 2.25V to 5.5V
  • 2.25V to 5.5V Level Translation
  • Wide Temperature Range: –55°C to 125°C
  • Low Power Consumption, Typical 1.8mA per Channel at 1Mbps
  • Low Propagation Delay: 11ns Typical (5V Supplies)
  • Industry leading CMTI(Min): ±100kV/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:
    • 8000VPK Reinforced Isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 5.7kVRMS Isolation for 1 Minute per UL 1577
    • IEC 61010-1, IEC 62368-1, IEC 60601-1, GB 4943.1
  • Signaling Rate: Up to 100Mbps
  • Wide Supply Range: 2.25V to 5.5V
  • 2.25V to 5.5V Level Translation
  • Wide Temperature Range: –55°C to 125°C
  • Low Power Consumption, Typical 1.8mA per Channel at 1Mbps
  • Low Propagation Delay: 11ns Typical (5V Supplies)
  • Industry leading CMTI(Min): ±100kV/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:
    • 8000VPK Reinforced Isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 5.7kVRMS Isolation for 1 Minute per UL 1577
    • IEC 61010-1, IEC 62368-1, IEC 60601-1, GB 4943.1

The ISO7821 is a high-performance, dual-channel digital isolator with 8000VPK 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/Os. 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 remarkable 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-controller driving applications and to reduce power consumption.

The ISO7821 is a high-performance, dual-channel digital isolator with 8000VPK 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/Os. 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 remarkable 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-controller driving applications and to reduce power consumption.
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技术文档

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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
证书 UL Certificate of Compliance File E181974 Vol 4 Sec 6 (Rev. T) 2026-9-29
证书 VDE Certificate for Reinforced Isolation for DIN EN IEC 60747-17 (Rev. AB) 2026-7-15
白皮书 交流电机驱动器中的隔离：了解 IEC 61800-5-1 安全标准 2026-5-20
白皮书 High-voltage reinforced isolation: Definitions and test methodologies (Rev. A) PDF | HTML 2026-5-12
证书 TUV Certificate for Isolation Devices (Rev. M) 2026-5-7
白皮书 通过使用数字隔离器替代光耦合器改善系统性能 (Rev. D) PDF | HTML 英语版 (Rev.D) PDF | HTML 2025-11-13
证书 CQC Certificate for ISOxxDWx (Rev. K) 2025-8-18
应用手册 数字隔离器设计指南 (Rev. G) PDF | HTML 英语版 (Rev.G) PDF | HTML 2023-9-20
白皮书 符合 IEC60664 标准的电机驱动应用电路板绝缘设计 PDF | HTML 英语版 PDF | HTML 2023-9-11
证书 CSA Certificate for ISO78xxDWx 2023-3-13
白皮书 Why are Digital Isolators Certified to Meet Electrical Equipment Standards? 2021-11-16
白皮书 绝缘穿透距离：数字隔离器如何满足认证要求 英语版 PDF | HTML 2021-9-27
模拟设计期刊 推动高性能数字隔离技术 (Rev. A) 2018-10-2
模拟设计期刊 Pushing the envelope with high-performance digital-isolation technology (Rev. A) 2018-8-22
应用简报 Considerations for Selecting Digital Isolators 2018-7-24
功能安全信息 Isolation in solar power converters: Understanding the IEC62109-1 safety standar (Rev. A) 2018-5-18
模拟设计期刊 How to reduce radiated emissions of digital isolators for systems with RF module 2018-3-26
应用手册 Isolation Glossary (Rev. A) 2017-9-19
模拟设计期刊 适用于隔离栅极驱动器的共模瞬态抗扰度 英语版 2015-11-16
模拟设计期刊 2015 年第 4 季度模拟应用期刊 英语版 2015-11-16
白皮书 Understanding electromagnetic compliance tests in digital isolators 2014-10-17

设计与开发

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评估板

DIGI-ISO-EVM — 通用数字隔离器评估模块

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评估板

ISO7842-EVM — 高抗扰度 5.7kVRMS 增强型四通道 2/2 数字隔离器评估模块

ISO7842 提供符合 UL 标准、持续时间长达 1 分钟的 5,700VRMS 电隔离，以及符合 VDE 标准的 8,000VPK 电隔离。这些器件具有四个由逻辑输入和输出缓冲器组成的隔离通道，并由二氧化硅 (SiO2) 绝缘栅进行隔离。与隔离式电源一起使用，此器件可防止数据总线或者其他电路上的噪音电流进入本地接地并干扰和损坏敏感电路。

ISO7842-EVM 可帮助设计人员评估器件性能，支持隔离式系统的快速开发和分析。此 EVM 支持评估采用 16 引脚 SOIC 封装的任何 TI 四通道数字隔离器。

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仿真模型

ISO7821 IBIS Model (Rev. A)

SLLM266A.ZIP (52 KB) - IBIS 模型
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仿真模型

ISO7821F IBIS Model (Rev. B)

SLLM276A (52 KB) - IBIS 模型
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参考设计

TIDA-00785 — 隔离式 GaN 驱动器参考设计

此参考设计包含一个增强型双通道数字隔离器、一个 GaN 栅极驱动器和多个隔离式电源。这一紧凑型参考设计旨在控制电源、直流/直流转换器、同步整流、光伏逆变器和电机控制中的 GaN。栅极驱动器采用基于开环推挽式拓扑的电源，这为 PCB 布线提供了灵活性。TIDA-00785 中使用的推挽式变压器驱动器以 300kHz 的频率运行，可帮助减小隔离变压器的尺寸，从而实现紧凑型电源解决方案。
支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
SOIC (DW) 16 Ultra Librarian
SOIC (DWW) 16 Ultra Librarian
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