INA241B
- Enhanced PWM rejection
optimized for systems subject to switching common-mode voltages
- Supports switching frequencies up to 125kHz
- Wide common-mode voltage:
- Operational voltage: −5V to 110V
- Survival voltage: −20V to 120V
- Bidirectional operation
- High small signal bandwidth: 1.1MHz (at all gains)
- Slew rate: 8V/µs
- Step response settling time to 1%: 1µs
- Excellent CMRR
- 166dB DC-CMRR
- 104dB AC-CMRR at 100kHz
- 89dB AC-CMRR at 1MHz
- Accuracy:
- Gain error (maximum)
- Version A: ±0.01%, ±1ppm/°C drift
- Version B: ±0.1%, ±5ppm/°C drift
- Offset voltage (maximum)
- Version A: ±10µV, ±0.1µV/°C drift
- Version B: ±150µV, ±0.5µV/°C drift
- Gain error (maximum)
- Available gains:
- INA241A1, INA241B1 : 10V/V
- INA241A2, INA241B2 : 20V/V
- INA241A3, INA241B3 : 50V/V
- INA241A4, INA241B4 : 100V/V
- INA241A5, INA241B5 : 200V/V
- Package options: SOT23-8, VSSOP-8, SOIC-8,
The INA241x is an ultra-precise, bidirectional current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from –5V to 110V, independent of the supply voltage. The high-precision current measurement is achieved through a combination of low offset voltage (±10µV, maximum), small gain error (±0.01%, maximum) and a high DC CMRR (typical 166dB). The INA241x is designed for high voltage, bidirectional measurements in switching systems that see large common-mode voltage transients at the device inputs. The enhanced PWM rejection circuitry inside the INA241x provides minimal signal disturbance at the output due to the common-mode voltage transitions at the input.
The INA241x operates from a single 2.7V to 20V supply, drawing 2.5mA of supply current. The INA241x is available in five gain options: 10V/V, 20V/V, 50V/V, 100V/V, and 200V/V. Multiple gain options allow for optimization between available shunt resistor values and wide output dynamic range requirements.
The INA241x is specified over operating temperature range of −40°C to 125°C.
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具備升級功能，可直接投入使用替代所比較的裝置。
針腳對針腳的功能與所比較的裝置相同。
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 | INA241x –5V to 110V, Bidirectional, Ultra-Precise Current Sense Amplifier With Enhanced PWM Rejection datasheet (Rev. D) | PDF | HTML | 2024/12/9 | ||
| 應用說明 | Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers | PDF | HTML | 2024/11/18 | |||
| Application brief | Leak Detection, Flow, and Pressure Monitoring in Liquid-Cooled Server Cards and Coolant Distribution Units | PDF | HTML | 2024/10/9 | |||
| Application brief | Current Sensing in Collaborative and Industrial Robotic Arms (Rev. B) | PDF | HTML | 2023/7/24 | |||
| Application brief | Current Mode Control in Switching Power Supplies (Rev. E) | PDF | HTML | 2023/4/12 | |||
| Application brief | Current Sensing in Mobile Robots | PDF | HTML | 2022/11/29 | |||
| 證書 | INA241BEVM EU RoHS Declaration of Conformity (DoC) | 2022/11/16 | ||||
| 類比設計期刊 | Second-sourcing options for small-package amplifiers | 2018/3/26 |
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)。
INA241AEVM — 具有 PWM 抑制功能且適用於 -5-V 至 110-V 1.1-MHz 電流感測放大器的 INA241x 評估模組
INA241AEVM 是一個小型模組，具有五個完全獨立的電路板，可由設計人員拆開。INA241x 的五個增益變體的每一個，都可以使用五個結構相同的電路板，具有最高 110-V 共模輸入範圍和 10-A (板載分流) 輸入功能。
各電路板都會提供 VS、GND、OUT 和 Vin+ 和 Vin- 的端子區塊的測試點。焊盤和插槽允許快速實作輸入和輸出濾波，以及板載 2512 尺寸的分流電阻器。
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
類比工程師的計算機旨在加速類比電路設計工程師定期使用的許多重複計算。此基於 PC 的工具提供圖形介面，列出各種常見計算，從使用回饋電阻器設定運算放大器增益到選擇適當的電路設計元件以穩定類比數位轉換器 (ADC) 驅動緩衝電路。
除了作為獨立工具使用外，此計算機還與類比工程師口袋參考中描述的概念相得益彰。
CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |
| SOIC (D) | 8 | Ultra Librarian |
| SOT-23-THN (DDF) | 8 | Ultra Librarian |