TPS2661
- ±50-V operating voltage, ±55-V absolute maximum
- Integrated fixed bipolar 32-mA current limit
- Allows 2x current limit at start-up
- 50% space savings compared to a typical discrete protection circuit
- Low R-on: 7.5-Ω typical
- Low IQ (< 100 nA) – current drawn from loop when powered from external supply
- Protection against miswiring conditions on IN and OUT
- Protection during signal line surge IEC61000-4-5 (with external TVS)
- Criteria-A EFT (IEC61000-4-4) immunity (with external TVS)
- Supports loop testing without supply (TPS26610 only)
- HART compliant
- Enable control
- SGOOD for system health monitoring
- Thermal shutdown
The TPS2661x is a compact, feature-rich, fully integrated current loop protector suitable for analog inputs, analog outputs, sensor transmitters, HART inputs, and UART IO protection. The device provides universal input protection for ±20 mA, 0 mA to 20 mA, and 4 mA–20 mA. Low RON values of 7.5 Ω minimizes drop in the current loop, thereby extending operating range and supporting operation even with lower voltage power supplies. The device can withstand and protect the loads from positive and negative supply voltages up to ±50 V. The MODE pin allows flexibility to enable 2x current limit through the device to enable proper start-up of two wire transmitters. Device is capable of operating from an external bipolar supply as low as ± 2.25 V to ±20 V. The device can also be powered from unipolar supplies as low as 3 V to 30 V. The TPS26610 and TPS26613 feature loop power mode to facilitate loop testing in un-powered state without ±Vs supplies.
The device also protects the system from output side miswiring in analog outputs and sensor transmitters by turning off the current path. The internal robust protection control blocks along with the 50-V rating of the TPS2661x help to protect against surge (IEC61000-4-5) and EFT (IEC61000-4-4) transients for signal lines. The device greatly reduces system footprint by its 2.9-mm × 1.6-mm 8-pin SOT-23 package.
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 | TPS2661x: 50-V, Universal 4–20 mA, ±20-mA Current Loop Protector With Input and Output Miswiring Protection datasheet (Rev. C) | PDF | HTML | 2021/12/8 | ||
| Circuit design | Output Overvoltage Protection Circuit for Voltage DACs Without an External Feedback Pin | PDF | HTML | 2025/6/18 | |||
| 證書 | TPS2661 UL2367 Certificate of Compliance E169910 | 2023/2/9 | ||||
| 應用說明 | Cost-Optimized, High-Performance Front-End Design for Analog Input Modules | PDF | HTML | 2022/6/22 | |||
| 應用說明 | Protection for HART I/O in Analog Input and Output Modules with TPS2661x | PDF | HTML | 2021/9/9 | |||
| 應用說明 | New Approach to Protect 4–20 mA, ±20-mA Analog Input | PDF | HTML | 2021/7/6 | |||
| 證書 | TPS2661EVM EU RoHS Declaration of Conformity (DoC) (Rev. A) | 2021/2/17 | ||||
| 應用說明 | Enabling Smarter, Integrated Protection for 4-20mA Current Loops with eFuses | PDF | HTML | 2020/12/11 |
設計與開發
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TPS2661EVM — TPS2661x 電流迴路保護器評估模組
TVS-RECOMMENDATION-CALC — TVS diode recommendation tool
TIDA-011026 — 現場發射器平台：三線 4mA 至 20mA 介面參考設計
此參考設計提供 3 線制電壓和電流介面感測器的 4-20mA 介面實作範例。此設計可評估 XTR200 和電流迴路保護器 TPS2661。XTR200 整合了電壓和電流現場發射器通訊介面的輸出驅動電路，支援標準工業訊號電平，如 4-20mA、0-20mA 及 0-10V。此參考設計透過針腳接頭提供對脈衝寬度調變 (PWM) 介面的存取，此介面用於驅動輸出級。此針腳接頭也提供 3.3V 電源來為連接的微控制器供電。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23-THN (DDF) | 8 | 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。