DRV411参考设计电路|信号调节应用电路

DRV411是一款针对闭环电流传感器模块内的使用来调节 InSb 霍尔元件。此篇主要介绍了DRV411特性、应用范围、参考设计电路以及电路分析，帮助大家缩短设计时间。

DRV411特性：

DRV411 为霍尔元件提供精密激发电路，以有效消除霍尔元件的偏移和偏移-漂移。 这个器件还提供一个 250mA H 桥来驱动传感器补偿线圈，以及一个精密差分放大器来生成输出信号。 相对于传统单端驱动方法，H 桥 250mA 的驱动能力几乎将电流测量范围加倍。

主要特性：针对对称霍尔元件进行了优化、旋转电流霍尔传感器激发、霍尔传感器偏移和漂移的消除、1/f 噪声的消除、内置精密差分放大器、精密基准等

DRV411典型应用范围包括：闭环电流传感器模块、直流和交流电流测量

DRV411参考设计电路：

DRV411应用电路分析：Proper selection of the GSEL mode enables the sensor designer to create a sensor with stable gain over a widefrequency range and excellent loop stability. Modes Gain_1 to Gain_3 allow for different fixed gain and zerofrequency options to be selected according to the requirements of the individual sensor. See Table 1 for moreinformation. Evaluate Gain_3 mode (GSEL [1,0]) first because it works with most common sensors.

Mode Selection
Gain_1 Mode For use with sensors with compensation coil inductance 50 mH.
Gain_2 Mode For use with sensors with very small form factor (small core diameter), where the transformer
effect starts to dominate the transfer function at frequencies significantly above 3.8 kHz. Typically the
inductance of the compensation coil would be very small.
Gain_3 Mode Works well with a wide selection of sensors with compensation coil inductance typically ≥ 50 mH.

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带有原理图和源码的热门应用电路请见：www.cirmall.com