INA296A
- 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
- 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:
- INA296A1, INA296B1 : 10V/V
- INA296A2, INA296B2 : 20V/V
- INA296A3, INA296B3 : 50V/V
- INA296A4, INA296B4 : 100V/V
- INA296A5, INA296B5 : 200V/V
- Package options: SOT23-8, VSSOP-8, SOIC-8,
The INA296x 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 INA296x is not only designed for high voltage, bidirectional DC current measurements, but also for high-speed applications (such as transient detection and fast overcurrent protection) with a high signal bandwidth of 1.1MHz and fast settling time.
The INA296x operates from a single 2.7V to 20V supply, drawing 2.5mA of supply current. The INA296x 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 INA296x is specified over operating temperature range of −40°C to 125°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 | INA296x –5V to 110V, Bidirectional, 1.1MHz, 8V/μs, Ultra-Precise Current Sense Amplifier datasheet (Rev. D) | PDF | HTML | 2024/12/9 | ||
| Application brief | Precision Current Sensing in Humanoid Robots | PDF | HTML | 2025/6/30 | |||
| 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 | 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 | Switching Power Supply Current Measurements (Rev. E) | PDF | HTML | 2023/4/7 | |||
| Application brief | Current Sensing in Mobile Robots | PDF | HTML | 2022/11/29 | |||
| 證書 | INA296AEVM EU RoHS Declaration of Conformity (DoC) (Rev. B) | 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)。
INA296AEVM — 具有 5-V/µs 電壓轉換率且適用於 -5-V 至 110-V 1.1-MHz 電流感測放大器的 INA296x 評估模組
INA296AEVM 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。INA296x 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
PMP23421 — 多相四開關降壓升壓 DC/DC 轉換器參考設計
PMP41155 — 開放式運算專案® (OCP)、開放式機架 V3 12KW 電源電池備援單元 (BBU) 設計
此參考設計為四開關、降壓升壓 DC/DC 轉換器，用於電池備援單元 (BBU) 應用，符合開放式運算計畫（Open Compute Project®，OCP）開放式機架 V3 電源 BBU 規範。此設計具備 12KW 功率能力。轉換器可根據 Vin 和 Vout 電壓，以降壓、降壓升壓或升壓模式運作。轉換器在各模式之間順暢暫態。此設計採用峰值電流模式控制，可提供快速負載暫態響應。憑藉 LM51770 的特性，場效電晶體不需要額外驅動器。此設計共有六個相位，其中六個相位會並聯以進行電池放電操作，提供高達 12KW 的放電功率。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |
| SOT-23-THN (DDF) | 8 | Ultra Librarian |
| SOIC (D) | 8 | Ultra Librarian |