ISO1176
- Meets or exceeds the requirements of EN 50170 and TIA/EIA-485-A
- Signaling rates up to 40 Mbps
- Differential output exceeds 2.1 V (54 Ω load)
- Low bus capacitance – 10 pF (maximum)
- Up to 160 transceivers on a bus
- 50 kV/µs typical transient immunity
- Fail-safe receiver for bus open, short, idle
- 3.3 V inputs are 5 V tolerant
- Bus-pin ESD protection
- 16 kV HBM between bus pins and GND2
- 6 kV HBM between bus pins and GND1
- Safety and regulatory approvals
- 4000 V PK isolation, 560 V PK V IORM per DIN EN IEC 60747-17 (VDE 0884-17)
- 2500 V RMS isolation rating per UL 1577
- 4000 V PK isolation rating per CSA 62368-1
The ISO1176 device is an isolated differential line transceiver designed for use in PROFIBUS applications. The device is ideal for long transmission lines because the ground loop is broken to provide for operation with a much larger common-mode voltage range. The symmetrical isolation barrier of each device is tested to provide 2500 V RMS of isolation per UL between the line transceiver and the logic level interface.
The galvanically isolated differential bus transceiver is an integrated circuit designed for bidirectional data communication on multipoint bus-transmission lines. The transceiver combines a galvanically isolated differential line driver and differential input line receiver. The driver has an active-high enable with isolated enable-state output on the ISODE pin (pin 10) to facilitate direction control. The driver differential outputs and the receiver differential inputs connect internally to form a differential input/output (I/O) bus port that is designed to offer minimum loading to the bus allowing up to 160 nodes.
The PV pin (pin 7) is provided as a full-chip enable option. All device outputs become high impedance when a logic low is applied to the PV pin. For more information, see the function tables in .
Any cabled I/O can be subjected to electrical noise transients from various sources. These noise transients can cause damage to the transceiver and/or nearby sensitive circuitry if they are of sufficient magnitude and duration. The ISO1176 can significantly reduce the risk of data corruption and damage to expensive control circuits.
The device is characterized for operation over the ambient temperature range of –40°C to +85°C.
技術文件
| 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 | ISO1176 Isolated RS-485 Profibus Transceiver datasheet (Rev. F) | PDF | HTML | 2023/8/17 | ||
| 證書 | VDE Certificate for Basic Isolation for DIN EN IEC 60747-17 (Rev. AA) | 2026/6/11 | ||||
| 證書 | UL Certificate of Compliance File E181974 Vol 4 Sec 2 (Rev. A) | 2026/1/8 | ||||
| Application brief | How to Isolate Signal and Power for an RS-485 System (Rev. D) | PDF | HTML | 2025/11/7 | |||
| 證書 | CSA Certificate for ISO1176DW, ISO308xDW, ISO15xDW, ISO035xDW (Rev. A) | 2025/8/20 | ||||
| 應用說明 | Isolated RS-485 Transceiver Reference Design (Rev. A) | PDF | HTML | 2022/9/23 | |||
| Application brief | Robust Isolated RS-485 Enables New Industrial Applications (Rev. C) | PDF | HTML | 2022/7/26 | |||
| Application brief | How to Isolate RS-485 for Smallest Size and Highest Reliability (Rev. C) | PDF | HTML | 2022/7/6 | |||
| 白皮書 | Why are Digital Isolators Certified to Meet Electrical Equipment Standards? | 2021/11/16 | ||||
| 白皮書 | Distance Through Insulation: How Digital Isolators Meet Certification Requiremen | PDF | HTML | 2021/6/11 |
設計與開發
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ISO1176EVM — ISO1176EVM 評估模組
The EVM can be used to evaluate device parameters while acting as a guide for board layout. The board allows the connection of a 50 ohm coaxial cable (via an SMA connector) to connect to instrumentation, or to 54-ohm controlled impedance cable of varying lengths (via a female header or (...)
TIDA-00012 — 高效率獨立 CAN 及 Profibus 介面參考設計
The high-efficiency isolated CAN and Profibus interface reference design is intended for use in industrial systems that require isolated power for CAN and/or Profibus transceivers. This design highlights the ability to completely shut off both the power converter and data transceivers with just one (...)
TIDA-00128 — 適用於斷路器 (ACB/MCCB-ETU) 的低功率、低雜訊類比前端設計
此參考設計適用於模製外殼斷路器 (MCCB) 電子跳脫裝置。 運算放大器在設計方面，可做為過電流接地故障繼電器的電流監控。此設計運用低成本運算放大器，提供 ±10% 拾取 (A) 準確度以及 0% 至 -20% 的延遲時間 (秒) 準確度。此外，本設計亦將嚴苛環境條件納入考量，提供諸如 -10 to 70°C 周圍不敏感度範圍，以及高電磁抗擾度等功能。最後，此設計的類比前端會與 TI MSP430 MCU 無縫介接，以加快評估速度及上市時間。
TIDA-00191 — 具有強化電流範圍的馬達電子過載繼電器的模擬前端
此參考設計為電子過載繼電器的類比前端 (AFE)，用於監控和保護馬達免受過電流或欠電流事件影響。如果開發人員需要為工業應用中的敏感 AC 馬達設計過載繼電器，此工具便是理想選擇。此可編程增益放大器 (PGA) 架構類比前端旨在作為簡易評估平台，適用於準確、業界領先的 10:1 全負載安培 (FLA) 範圍，並可在 -10 至 +70°C 溫度範圍內重複使用。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOIC (DW) | 16 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。