DRV425
- High-precision, integrated fluxgate sensor:
- Offset: ±8µT (max)
- Offset drift: ±5nT/°C (typ)
- Gain error: 0.04% (typ)
- Gain drift: ±7ppm/°C (typ)
- Linearity: ±0.1%
- Noise: 1.5nT/√ Hz (typ)
- Sensor range: ±2mT (max)
- Range and gain adjustable with external resistor
- Selectable bandwidth: 47kHz or 32kHz
- Precision reference:
- Accuracy: 2% (max), drift: 50ppm/°C (max)
- Pin-selectable voltage: 2.5V or 1.65V
- Selectable ratiometric mode: VDD / 2
- Diagnostic features: Overrange and error flags
- Supply voltage range: 3.0V to 5.5V
The DRV425 is designed for single-axis magnetic field-sensing applications, and enables electrically-isolated, high-sensitivity, and precise dc- and ac-field measurements. The device provides the unique and proprietary, integrated fluxgate sensor (IFG) with an internal compensation coil to support a high-accuracy sensing range of ±2mT, with a measurement bandwidth of up to 47kHz. The low offset, offset drift, and noise of the sensor, combined with the precise gain, low gain drift, and very low nonlinearity provided by the internal compensation coil, result in unrivaled magnetic field measurement precision. The output of the DRV425 is an analog signal proportional to the sensed magnetic field.
The device offers a complete set of features, including an internal difference amplifier, on-chip precision reference, and diagnostic functions to minimize component count and system-level cost.
The device is available in a thermally-enhanced, nonmagnetic, thin WQFN package, with a thermal pad for optimized heat dissipation, and is specified for operation over the 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 | DRV425 Fluxgate Magnetic-Field Sensor datasheet (Rev. B) | PDF | HTML | 2025/10/13 | ||
| 電子書 | An Engineer's Guide to Current Sensing (Rev. B) | 2022/4/12 | ||||
| 技術文章 | Addressing high-voltage current-sensing design challenges in HEV/EVs | PDF | HTML | 2019/11/4 | |||
| 技術文章 | Current sensing in battery management systems | PDF | HTML | 2019/5/30 | |||
| Application brief | Fluxgate for Motor Diagnostics | 2017/12/21 | ||||
| 白皮書 | Achieve greater precision, reliability with magnetic sensing technology | 2017/6/26 | ||||
| Application brief | Design Considerations for Dual DRV425 Bus Bar Application | 2017/3/30 | ||||
| 應用說明 | Bus Bar Theory of Operation | 2016/11/8 |
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)。
DRV425-BUSBAR-EVM — 使用開迴路通量閘感測器的 ±100A 匯流條電流感測器參考設計評估組件
DRV425EVM — DRV425 開迴路磁場感測評估模組
DRV425EVM 是適用於 DRV425 的評估平台，後者是一款完整的類比前端 IC 與線圈驅動器，適用於開迴路磁場感測應用。DRV425EVM 允許使用者探索 DRV425 裝置的所有功能。
ADTEC-3P-EBIKE — AD-TEC 電動輔助自行車扭力與踏頻率感測器，搭載 DRV425 磁機械式元件
ADTEC-3P-STRESSSENSOR — AD-TEC active magnetoelastic stress sensor for steel featuring DRV425
TIPD205 — 使用開迴路通量閘感測器的 ±100A 匯流條電流感測器參考設計
此款單電源供電開環電流感測解決方案，可精確測量 DC、AC 及脈衝電流。允許高達 110A 的高度準確電流測量
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (RTJ) | 20 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。