INA139
- Complete Unipolar High-Side Current Measurement Circuit
- Wide Supply and Common-Mode Range
- INA139: 2.7 V to 40 V
- INA169: 2.7 V to 60 V
- Independent Supply and Input Common-Mode Voltages
- Single Resistor Gain Set
- Low Quiescent Current: 60 µA (Typical)
- 5-Pin, SOT-23 Packages
The INA139 and INA169 are high-side, unipolar, current shunt monitors. Wide input common-mode voltage range, high-speed, low quiescent current, and tiny SOT-23 packaging enable use in a variety of applications.
Input common-mode and power-supply voltages are independent and can range from 2.7 V to 40 V for the INA139 and 2.7 V to 60 V for the INA169. Quiescent current is only 60 µA, which permits connecting the power supply to either side of the current measurement shunt with minimal error.
The device converts a differential input voltage to a current output. This current is converted back to a voltage with an external load resistor that sets any gain from 1 to over 100. Although designed for current shunt measurement, the circuit invites creative applications in measurement and level shifting.
Both the INA139 and INA169 are available in 5-pin SOT-23 packages. The INA139 device is specified for the –40°C to +125°C temperature range, and the INA169 is specified from –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 | INA1x9 High-Side Measurement Current Shunt Monitor datasheet (Rev. F) | PDF | HTML | 2017/2/27 | ||
| 應用說明 | Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A) | PDF | HTML | 2026/4/27 | |||
| Circuit design | High-voltage, high-side floating current sensing circuit using current output, c (Rev. A) | PDF | HTML | 2024/9/26 | |||
| 電子書 | An Engineer's Guide to Current Sensing (Rev. B) | 2022/4/12 | ||||
| 應用說明 | Extending the Common-Mode Voltage Range of Current-Output Current Shunt Monitors (Rev. A) | PDF | HTML | 2022/3/21 | |||
| Application brief | Extending Beyond the Max Common-Mode Range of Discrete Current-Sense Amplifiers (Rev. A) | PDF | HTML | 2022/3/10 | |||
| 類比設計期刊 | 2Q 2012 Issue Analog Applications Journal | 2012/4/26 | ||||
| 類比設計期刊 | 3Q 2011 Issue Analog Applications Journal | 2011/9/16 |
設計與開發
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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
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23 (DBV) | 5 | Ultra Librarian |