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隔離式數位輸入

ISO1212

現行

適用數位輸入模組的雙通道隔離 24-V 至 60-V 數位輸入接收器

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產品規格表

ISO1212

現行
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產品詳細資料

Rating Catalog Isolation rating Basic Number of channels 2 Forward/reverse channels 2/0 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 2 Forward/reverse channels 2/0 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
SSOP (DBQ) 16 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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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 Single-channel solution

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 ISOxxDBQ (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 ISO1212 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2024/9/12
證書 CSA Certificate for ISO1212xDBQ 2023/3/23
應用說明 L1 and L2 EV Charger Electric Vehicle Service Equipment Design Considerations (Rev. B) 2021/6/9
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
白皮書 How Capacitive Isolation Solves Key Challenges in AC Motor Drives 2019/8/23
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

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開發板

ISO1212EVM — ISO1212 雙通道隔離式數位輸入接收器評估模組

ISO1212EVM 是一款評估模組 (EVM)，用於評估 ISO1212 隔離式工業接收器，該元件可接收 9V 至 60V 的現場輸入並輸出隔離數位訊號。該 EVM 可容納 4 個雙通道的 ISO1212 裝置，展現 8 通道功能。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

ISO1212 PSpice Transient Model (Rev. A)

SLLM384A.ZIP (62 KB) - PSpice 模型
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模擬型號

ISO1212 TINA-TI Transient Reference Design (Rev. A)

SLLM391A.TSC (1215 KB) - TINA-TI 參考設計
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模擬型號

ISO1212 TINA-TI Transient Spice Model (Rev. A)

SLLM392A.ZIP (16 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-010008 — 適合電網應用瞬態保護的平箝制 TVS 架構參考設計

此參考設計具備多種方式，可保護 AC 或 DC 類比輸入、DC 類比輸出、AC 或 DC 二進位輸入、配備高側或低側驅動器的數位輸出、LCD 偏壓供應器、USB 介面 (電源和資料) 和內建電源供應器，並在多個電網應用中使用 24、12 或 5V 輸入，以防止過電壓、過載和暫態 (1.2/50μs、42-Ω)，並使用平箝制突波保護裝置、ESD 裝置、eFuse 或負載開關。此設計可監控溫度、濕度、磁場和電源供應器以進行診斷。
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參考設計

TIDA-010083 — 適用於機器視覺攝影機和視覺感測器的高密度隔離式 PoE 和 GigE 參考設計

乙太網路供電 (PoE) 提供簡單可靠的解決方案，可將電源與資料結合在單一纜線中，同時具備高資料速率與長距離傳輸。此組合讓 PoE 非常適合用於像是機器視覺攝影機和視覺感測器等小型裝置。此參考設計執行完整的 PoE 供電裝置 (PD)，其中包括 1-Gb/s 實體層及採 27 x 27 mm 超精巧外型尺寸的高效率隔離式電源解決方案。
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參考設計

TIDA-010239 — AC Level 2 充電器平台參考設計

Electric vehicle supply equipment (EVSE) facilitates power delivery to electric vehicles safely from the grid. An EVSE control system consists of an auxiliary power stage, an off-board AC/DC high-power stage (only in DC charging stations), energy metering unit, AC and DC residual current detector, (...)

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TIDA-010950 — 具有功率調節和霍爾效應位置感測功能的阻尼器與 EEV 控制器參考設計

此參考設計展示了阻尼器致動器與電子膨脹閥的雙馬達驅動解決方案。多重馬達驅動包含一個雙極步進馬達驅動器、一個由 15VDC 來源運作的無刷 DC 馬達驅動器。此設計顯示出精確的功率限制，有助於輕鬆鑑定為由 IEC 60335-1 定義的低功率電路。此參考設計整合 0-10V 和 4-20mA 控制介面，可控制閥門或阻尼器位置，以及用於精確位置感測的 TMAG5273。

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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-060014 — 用於 PLC 的 96 通道雙向數位輸入模組參考設計

此參考設計使用隔離式數位輸入接收器 ISO1212，實現 96 個隔離式數位輸入通道的精巧實作。此設計展現了 ISO1212 裝置的電流限制功能，其熱性能優於傳統光耦合器解決方案。此設計可讓具備多通道的數位輸入電路板變得更精巧，並降低電路板溫度（低於 50°C）。採用 ISO1212 裝置的多工器和解碼器可將微控制器的接腳數量從 96 降至 8。此設計已經過每通道 100kHz 輸入訊號 (200kbit) 的測試。該設計使用低於 7.3W 的輸入功率，可減少散熱。所有訊號的設計均符合 IEC6100-4 標準，可承受 ESD、EFT 及突波事件。
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