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隔離式介面 IC
隔離式數位輸入

ISO1211

現行

適用於數位輸入模組的單通道隔離 24-V 至 60-V 數位輸入接收器

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產品規格表

ISO1211

現行
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產品詳細資料

Rating Catalog Isolation rating Basic Number of channels 1 Forward/reverse channels 1/0 Data rate (max) (Mbps) 4 Working isolation voltage (VIOWM) (Vrms) 400 Surge isolation voltage (VIOSM) (VPK) 5200 Transient isolation voltage (VIOTM) (VPK) 3600 Withstand isolation voltage (VISO) (Vrms) 2500 CMTI (min) (kV/µs) 25 Operating temperature range (°C) -40 to 125 Propagation delay time (typ) (µs) 0.14
Rating Catalog Isolation rating Basic Number of channels 1 Forward/reverse channels 1/0 Data rate (max) (Mbps) 4 Working isolation voltage (VIOWM) (Vrms) 400 Surge isolation voltage (VIOSM) (VPK) 5200 Transient isolation voltage (VIOTM) (VPK) 3600 Withstand isolation voltage (VISO) (Vrms) 2500 CMTI (min) (kV/µs) 25 Operating temperature range (°C) -40 to 125 Propagation delay time (typ) (µs) 0.14
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • Compliant to IEC 61131-2; Type 1, 2, 3 characteristics for 24V isolated digital inputs
  • Supports 9V to 300V DC and AC digital input designs using external resistors
  • Accurate Current Limit for Low-Power Dissipation:
    • 2.2mA to 2.47mA for Type 3
    • Adjustable up to 6.5mA
  • Eliminates the need for field-side power supply
  • High input-voltage range with reverse polarity protection: ±60V
  • Wire-break detection (refer to TIDA-01509)
  • Configurable as sourcing or sinking input
  • High data rates: up to 4Mbps
  • Enable pin to multiplex output signals
  • High transient immunity: ±70kV/µs CMTI
  • Wide supply range (VCC1): 2.25V to 5.5V
  • Ambient temperature range: –40°C to +125°C
  • Compact package options:
    • Single-channel ISO1211, SOIC-8
    • Dual-channel ISO1212, SSOP-16
  • Functional safety capable
    • Documentation available to aid functional safety system design: ISO1211, ISO1212
  • Compliant to IEC 61131-2; Type 1, 2, 3 characteristics for 24V isolated digital inputs
  • Supports 9V to 300V DC and AC digital input designs using external resistors
  • Accurate Current Limit for Low-Power Dissipation:
    • 2.2mA to 2.47mA for Type 3
    • Adjustable up to 6.5mA
  • Eliminates the need for field-side power supply
  • High input-voltage range with reverse polarity protection: ±60V
  • Wire-break detection (refer to TIDA-01509)
  • Configurable as sourcing or sinking input
  • High data rates: up to 4Mbps
  • Enable pin to multiplex output signals
  • High transient immunity: ±70kV/µs CMTI
  • Wide supply range (VCC1): 2.25V to 5.5V
  • Ambient temperature range: –40°C to +125°C
  • Compact package options:
    • Single-channel ISO1211, SOIC-8
    • Dual-channel ISO1212, SSOP-16
  • Functional safety capable
    • Documentation available to aid functional safety system design: ISO1211, ISO1212

The ISO1211 and ISO1212 devices are isolated 24V to 60V digital input receivers, compliant to IEC 61131-2 Type 1, 2, and 3 characteristics. These devices enable 9V to 300V DC and AC digital input modules in programmable logic controllers (PLCs), motor-control, grid infrastructure, and other industrial applications. Unlike traditional optocoupler designs with discrete, imprecise current limiting circuitry, the ISO121x devices provide a simple, low-power design with an accurate current limit to enable the design of compact and high-density I/O modules. These devices do not require field-side power supply and are configurable as sourcing or sinking inputs.

The ISO121x devices operate over the supply range of 2.25V to 5.5V, supporting 2.5V, 3.3V, and 5V controllers. A ±60V input tolerance with reverse polarity protection helps provide the input pins are protected in case of faults with negligible reverse current. These devices support up to 4Mbps data rates passing a minimum pulse width of 150ns for high-speed operation. The ISO1211 device is designed for applications that require channel-to-channel isolation and the ISO1212 device is designed for multichannel space-constrained designs.

The ISO121x devices reduce component count, simplify system design, improve performance, and reduce board temperatures compared to traditional designs. For details, refer to the How To Simplify Isolated 24V PLC Digital Input Module Designs TI TechNote, How To Improve Speed and Reliability of Isolated Digital Inputs in Motor Drives TI TechNote, and How to Design Isolated Comparators for ±48V, 110V and 240V DC and AC Detection TI TechNote.

The ISO1211 and ISO1212 devices are isolated 24V to 60V digital input receivers, compliant to IEC 61131-2 Type 1, 2, and 3 characteristics. These devices enable 9V to 300V DC and AC digital input modules in programmable logic controllers (PLCs), motor-control, grid infrastructure, and other industrial applications. Unlike traditional optocoupler designs with discrete, imprecise current limiting circuitry, the ISO121x devices provide a simple, low-power design with an accurate current limit to enable the design of compact and high-density I/O modules. These devices do not require field-side power supply and are configurable as sourcing or sinking inputs.

The ISO121x devices operate over the supply range of 2.25V to 5.5V, supporting 2.5V, 3.3V, and 5V controllers. A ±60V input tolerance with reverse polarity protection helps provide the input pins are protected in case of faults with negligible reverse current. These devices support up to 4Mbps data rates passing a minimum pulse width of 150ns for high-speed operation. The ISO1211 device is designed for applications that require channel-to-channel isolation and the ISO1212 device is designed for multichannel space-constrained designs.

The ISO121x devices reduce component count, simplify system design, improve performance, and reduce board temperatures compared to traditional designs. For details, refer to the How To Simplify Isolated 24V PLC Digital Input Module Designs TI TechNote, How To Improve Speed and Reliability of Isolated Digital Inputs in Motor Drives TI TechNote, and How to Design Isolated Comparators for ±48V, 110V and 240V DC and AC Detection TI TechNote.
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技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 ISO121x Isolated 24V to 60V Digital Input Receivers for Digital Input Modules datasheet (Rev. G) PDF | HTML 2025/2/12
證書 VDE Certificate for Basic Isolation for DIN EN IEC 60747-17 (Rev. AA) 2026/6/11
證書 TUV Certificate for Isolation Devices (Rev. M) 2026/5/7
證書 UL Certificate of Compliance File E181974 Vol 4 Sec 6 (Rev. S) 2026/5/7
證書 CQC Certificate for ISOxxD (Rev. B) 2025/8/19
Application brief How To Simplify Isolated 24V PLC Digital Input Module Designs (Rev. D) PDF | HTML 2025/6/30
Application brief Space-Saving Design Techniques for Multichannel High-Voltage Digital Input Modules (Rev. C) PDF | HTML 2024/11/11
功能安全資訊 ISO1211 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2024/9/12
證書 CSA Certificate for ISO1211xD 2023/3/22
技術文章 Understand and apply safety-limiting values for digital isolators PDF | HTML 2021/1/20
Application brief How to Design Isolated Digital Input Modules for Surge Immunity 2020/3/31
技術文章 Solving lifetime and temperature challenges in AC motor drives with capacitive-bas PDF | HTML 2019/11/1
技術文章 Optocouplers and silicon-based galvanic isolation technology – how do they work? PDF | HTML 2019/10/28
白皮書 How Capacitive Isolation Solves Key Challenges in AC Motor Drives 2019/8/23
Application brief An Isolated 24 V Power Supply Window Monitor 2019/8/1
技術文章 What are isolated digital inputs? PDF | HTML 2019/3/8
Application brief How to Design Isolated Comparators for ±48V, 110V and 240V DC and AC Detection (Rev. A) 2018/3/14
應用說明 ISO121x Threshold Calculator for 9V to 300V DC and AC Voltage Detection 2018/3/1
Application brief How to Improve Speed and Reliability of Isolated Digital Inputs in Motor Drives 2017/12/16
類比設計期刊 How to use isolation to improve ESD, EFT and surge immunity in industrial system 2017/7/24

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

ISO1211EVM — ISO1211 隔離式數位輸入接收器評估模組

ISO1211EVM 是一款評估模組 (EVM)，用於評估可接收 9-V 至 60-V 欄位輸入，並提供隔離式數位輸出的 ISO1211 隔離式工業接收器。EVM 可容納兩部展示 2 個通道功能的 ISO1211 裝置。EVM 具備足夠的測試點和跨接器選項，可用於評估具最少外部零組件的裝置。
使用指南: PDF
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模擬型號

ISO1211 PSpice Transient Model (Rev. C)

SLLM383C.ZIP (117 KB) - PSpice 模型
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模擬型號

ISO1211 TINA-TI Transient Reference Design

SLLM390A.TSC (1859 KB) - TINA-TI 參考設計
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模擬型號

ISO1211 TINA-TI Transient Spice Model (Rev. A)

SLLM389A.ZIP (12 KB) - TINA-TI Spice 模型
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模擬型號

ISO121X IBIS Model (Rev. B)

SLLM372B.ZIP (52 KB) - IBIS 模型
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參考設計

TIDA-01508 — Sub 1-W、16 通道隔離式數位輸入模組參考設計

此參考設計展示使用 TI ISO121x 裝置的 16 個隔離式數位輸入通道的精簡實作。此設計可在沒有隔離電源的情況下運作，並支援每通道最高 100kHz 輸入訊號 (200kbit)。所有 16 通道的總輸入功率都低於 1W，因此可實現精巧佈局，並將散熱降到最低。
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參考設計

TIDA-01509 — 使用光學交換器的損壞電線偵測參考設計

此參考設計展示使用 TI ISO121x 裝置的 16 個隔離式數位輸入通道的精簡實作。此設計分為兩組，每組八個通道。每個通道只需一個額外光學開關，或每個群組只需使用兩個光學開關和一個額外電容器，即可執行斷線偵測。此功能不需要二次側供電，因此使用 ISO121x 系列的數位輸入模組可享有獨特優勢。
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參考設計

TIDA-01599 — TÜV SÜD 評估工業驅動器的安全扭矩關閉 (STO) 參考設計 (IEC 61800-5-2)

本參考設計概述具有 CMOS 輸入隔離式 IGBT 閘極驅動器的三相逆變器的安全扭矩關閉 (STO) 子系統。STO 子系統採用雙通道架構 (1oo2)，硬體容錯範圍爲 1 (HFT=1)。實作時遵循去能脫扣概念。當雙 STO 輸入 (STO_1 和 STO_2) 變低電位作動時，六個隔離 IGBT 柵極驅動器的一次和二次側對應電源供電將透過負載開關切斷。如此可消除控制馬達並為馬達通電的可能性。STO 參考設計 (1oo2) 已由 TÜV SÜD 進行評估，一般適用於 SIL 3 和 PL e/Cat。3.
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SOIC (D) 8 Ultra Librarian
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