INA149
- Common-Mode Voltage Range: ±275 V
- Minimum CMRR: 90 dB from –40°C to +125°C
- DC Specifications:
- Maximum Offset Voltage: 1100 µV
- Maximum Offset Voltage Drift: 15 µV/°C
- Maximum Gain Error: 0.02%
- Maximum Gain Error Drift: 10 ppm/°C
- Maximum Gain Nonlinearity: 0.001% FSR
- AC Performance:
- Bandwidth: 500 kHz
- Typical Slew Rate: 5 V/µs
- Wide Supply Range: ±2.0 V to ±18 V
- Maximum Quiescent Current: 900 µA
- Output Swing on ±15-V Supplies: ±13.5 V
- Input Protection:
- Common-Mode: ±500 V
- Differential: ±500 V
The INA149 is a precision unity-gain difference amplifier with a very high input common-mode voltage range. It is a single, monolithic device that consists of a precision op amp and an integrated thin-film resistor network. The INA149 can accurately measure small differential voltages in the presence of common-mode signals up to ±275 V. The INA149 inputs are protected from momentary common-mode or differential overloads of up to 500 V.
In many applications, where galvanic isolation in not required, the INA149 can replace isolation amplifiers. This ability can eliminate costly isolated input side power supplies and the associated ripple, noise, and quiescent current. The excellent 0.0005% nonlinearity and 500-kHz bandwidth of the INA149 are superior to those of conventional isolation amplifiers.
The INA149 is pin-compatible with the INA117 and INA148 type high common-mode voltage amplifiers and offers improved performance over both devices. The INA149 is available in the SOIC-8 package with operation specified over the extended industrial 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 | High Common Mode Voltage Difference Amplifier datasheet (Rev. B) | 2012/7/30 | |||
| Circuit design | High common-mode differential input voltage to ±10-V ADC input circuit (Rev. A) | PDF | HTML | 2024/9/24 | |||
| 電子書 | An Engineer's Guide to Current Sensing (Rev. B) | 2022/4/12 | ||||
| 電子書 | Tips and tricks for designing with voltage references (Rev. A) | 2021/5/7 | ||||
| Application brief | How to Select Precision Amplifiers for Semiconductor Testers (Rev. A) | PDF | HTML | 2020/12/3 | |||
| 電子書 | The Signal e-book: A compendium of blog posts on op amp design topics | PDF | HTML | 2017/3/28 | |||
| 更多文件說明 | A High-Voltage Bidirectional Current Source | 2013/12/19 |
設計與開發
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ADS8686SEVM-PDK — ADS8686S 16 通道 16 位元 1-MSPS 雙同步取樣 ADC 性能示範套件 (PDK)
ADS8686S 評估模組 (EVM) 性能示範套件 (PDK) 是一款用於評估具有整合式類比前端 (AFE) 之 ADS8686S雙同步取樣類比數位轉換器 (ADC) 的平台。
ADS8686SEVM-PDK 包含 ADS8686SEVM 板和精密主機介面 (PHI) 控制器電路板,可讓隨附的電腦軟體透過通用序列匯流排 (USB) 與 ADC 通訊,以進行資料擷取及分析。
INA149EVM — INA149 評估模組
The INA149EVM is a platform for basic functional evaluation of the INA149 High Common-Mode Difference Amplifier
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。
TIDA-00439 — 適用於由 100/110Vac 電源供電之逆變器的分流架構接地故障防護參考設計
這是用於檢測逆變器驅動裝置中接地故障的參考設計。使用並聯電阻器在 DC 正極和 DC 負極匯流排上測量逆變器電流。採用共模電壓範圍為 +275V 的 INA149 電流偵測放大器來測量 DC 正極匯流排上的電流。DC 負極匯流排上的電流則以精準運算放大器進行偵測。使用高速比較器將兩個測量電流之間的差異與固定閾值進行比較,以確定接地故障情況。
TIDA-00764 — 八通道隔離式高電壓類比輸入模組參考設計
TIDA-01333 — 採用 ISOW7841 的八通道隔離式高電壓類比輸入模組參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |