INA138-Q1
- Qualified for Automotive Applications
- AEC-Q100 Qualified With
the Following Results:
- Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
- Device HBM ESD Classification Level 2
- Device CDM ESD Classification Level C6
- Complete Unipolar High-Side Current-Measurement Circuit
- Wide
Supply and Common-Mode Ranges:
- INA138-Q1: 2.7 V to 36 V
- INA168-Q1: 2.7 V to 60 V
- Independent Supply and Input Common-Mode Voltages
- Single Resistor Gain Set
- Low Quiescent Current (25 µA Typical)
- Wide Temperature Range: –40°C to +125°C
- Packages: TSSOP-8, SOT-23-5 (INA168-Q1)
The INA138-Q1 and INA168-Q1 (INA1x8-Q1) devices are high-side, unidirectional, current sense amplifiers. Wide input common-mode voltage range, low quiescent current, and TSSOP and SOT-23 packaging enable use in a variety of applications.
Input common-mode and power-supply voltages are independent, and range from 2.7 V to 36 V for the INA138-Q1, and 2.7 V to 60 V for the INA168-Q1. Quiescent current is only 25 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 devices are available in a TSSOP-8 package. The INA168-Q1 is also available in a SOT-23-5 package. Both devices are specified for the –40°C to +125°C temperature range.
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 | INA1x8-Q1 Automotive-Grade, High-Side, Current-Output, Current-Shunt Monitor datasheet (Rev. J) | PDF | HTML | 2018/8/3 | ||
| 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 | |||
| 應用說明 | Extending the Common-Mode Voltage Range of Current-Output Current Shunt Monitors (Rev. A) | PDF | HTML | 2022/3/21 |
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)。
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
SGLC001 — Source Files for SBOA295
TIDA-00332 — 高電壓 12 V – 400 V DC 電流感測參考設計
此經驗證設計顯示了使用 INA138 測量高達 400V 共模電壓的電路。這是透過建立簡單的浮動電源供應器，並直接從高電壓來源對 INA138 進行偏壓來實現的。此設計中的 400V 為範例。使用不同元件，甚至可實現更高的共模電壓。此電路經過測試，包含 Gerber 檔案、測試結果和功能詳細說明。
TIDA-00456 — 適用於車用車載充電器系統的電壓和電流量測參考設計
此參考設計使用電流分流放大器、運算放大器 (op amp)、ADC 和數位隔離器，為混合動力/電動車的板載充電器提供電流和電壓量測。測量的電流與電壓可做為控制訊號使用，以實現最佳的電池充電。此設計可測量高達 400V 共模電壓的高壓側電流，並與充電電路的 AC 部分隔離，以降低雜訊。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| TSSOP (PW) | 8 | Ultra Librarian |