DRV411
- Optimized for Symmetric Hall-Elements
(for example, AKM HW-322, HW-302, or similar) - Spinning Current Hall Sensor Excitation
- Elimination of Hall Sensor Offset and Drift
- Elimination of 1/f Noise
- Extended Current Measurement Range
- H-Bridge Drive Capability: 250 mA
- Precision Difference Amplifier:
- Offset and Drift: 100 µV (max), 2 µV/°C (max)
- System Bandwidth: 200 kHz
- Precision Reference:
- Accuracy: 0.2% (max)
- Drift: 50 ppm/°C (max)
- Pin-Selectable for 2.5 V, 1.65 V, and Ratiometric Mode
- Overrange and Error Flags
- Supply: 2.7 V to 5.5 V
- Packages: 4-mm × 4-mm QFN and TSSOP-20 PowerPAD™
- Temperature Range: –40°C to +125°C
The DRV411 is designed to condition InSb Hall elements for use in closed-loop current-sensor modules. The DRV411 provides precision excitation circuitry for the Hall-element effectively eliminating the offset and offset-drift of the Hall element. This device also provides a 250-mA H-bridge for driving the sensor compensation coil as well a precision differential amplifier to generate the output signal. The 250-mA drive capability of the H-bridge roughly doubles the current measurement range compared to conventional single-ended drive methods.
The Hall sensor front-end circuit and the differential amplifier employ proprietary offset cancelling techniques. These techniques, along with a high-accuracy voltage reference, significantly improve the accuracy of the overall current-sensor module. The output voltage is pin-selectable to support a 2.5-V output for use with a 5-V power supply, as well as 1.65-V for 3.3-V sensors.
For optimum heat dissipation, the DRV411 is available in thermally enhanced 4-mm × 4-mm QFN and TSSOP-20 with PowerPAD packages. The DRV411 is specified for operation over the full extended industrial temperature range of –40°C to +125°C.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | Sensor Signal Conditioning IC for Closed-Loop Magnetic Current Sensors 数据表 (Rev. B) | 2013-12-12 | |||
| 白皮书 | Achieve greater precision, reliability with magnetic sensing technology | 2017-6-26 | ||||
| 应用手册 | Design Considerations for the DRV411 | 2015-2-26 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
DRV411EVM — 针对闭环磁流传感器的传感器信号调节 IC 的评估模块
The DRV411EVM is an evaluation platform for the DRV411, a sensor signal conditioning integrated circuit for closed loop magnetic current sensors. The DRV411EVM allows evaluation of all aspects of the DRV411 device when connected to a user supplied hall sensor and coil. Complete schematics and a (...)
TIPD180 — 使用闭环补偿霍尔元件的 ±50A 电流传感器参考设计
此 TI 高精度验证设计提供了完整的基于闭环霍尔的电流传感器信号调节解决方案。 此电路包含 DRV411，可用于准确地测量 +/-50A 范围内的直流、交流和脉冲电流；初级和次级电路之间有电隔离。 DRV411 在单个封装中提供霍尔激励、补偿线圈驱动器和高精度差分放大器。 DRV411 采用的独特电流自旋技术几乎可以完全消除霍尔器件的偏移和 1/f 噪声，并在工业电机控制、能源和 HEV 等应用中实现准确的、电流隔离的高电流测量。
TIPD184 — 基于双极电源的 100A 闭环电流传感器参考设计
此 TI 精密验证设计采用 DRV411 和双极电源，提供了完整的 100A 闭环霍尔电流传感器解决方案。 DRV411 在单个封装中提供霍尔激励、补偿线圈驱动器和高精度差分放大器。 DRV411 采用的独特电流自旋技术，实际上消除了霍尔器件的偏移和 1/f 噪声。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 20 | Ultra Librarian |
| VQFN (RGP) | 20 | Ultra Librarian |
订购和质量
推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。