FAQ - HG 系列 霍尔元件

驱动HG系列霍尔元件时,定电流驱动和定电压驱动哪个好?

 [Q0401]

回答

霍尔输出电压的温度系数在定电压驱动下约为0.2%/℃,定电流驱动时约为-0.02~-0.08%/℃,所以一般用定电流驱动。另外,定电流驱动可以忽略磁阻效果,所以对于高磁场磁通量密度的线性效果更好。规格规定的线性2%以下为定电流驱动。

从基本型到超高灵敏度型都有,怎么选择才好呢?

 [Q0402]

回答

随着从基本型变成超高灵敏度型,定电压和定电流灵敏度也会上升。请参照下面的图表和表格。但是,输入输出电阻也会增加,所以需要注意放大率等电路匹配。霍尔输出电压和非平衡电压的温度特性是基本类型最好,超高灵敏度类型最差。

Related FAQ - 霍尔元件

霍尔元件的等效电路是怎样的?

 [Q0388]

回答

四个电阻的桥接电路。

霍尔元件有极性吗?

 [Q0389]

回答

在霍尔元件目录的外形尺寸图上有记载。

例如HW-101A,在1号引脚上加上+,在3号引脚上加上-的输入,将N极的磁铁靠近封装表面时,2号引脚上+,4号引脚上-输出。如果S极磁铁靠近封装表面时,输出极性相反,2号引脚-,4号引脚+输出。

霍尔元件怎么驱动?

 [Q0390]

回答

请参照以下。

霍尔元件的输出怎么放大?

 [Q0391]

回答

请参照以下。

霍尔元件的引脚镀金是什么?

 [Q0392]

回答

HW-300B和HW-32B有镀银和镀锡。其他都是镀锡。全部都支持RoHS。(2010年5月)

对应无卤素吗?

 [Q0393]

回答

也有对应的等级。详情请咨询。

相对于磁通量密度线性最好的霍尔元件是哪个?

 [Q0394]

回答

HG系列霍尔元件。定电流驱动时,线性在0.5T以下,不到2%。

霍尔元件的特性有滞后现象吗?

 [Q0395]

回答

超高灵敏度型的HW霍尔元件内部有磁性体,因此存在滞回性。

FAQ

HG Series : Hall Ellements

HG

[Q0401]
・Which is better when driving HG series hall elements, the constant current drive or constant voltage drive?
A.
・The temperature coefficient of the hall element output voltage is approx. -0.2% per °C for the constant voltage drive, and approx. -0.02% to -0.08% per °C for the constant current drive. As you see, the constant current drive has better coefficient, therefore basically use in the constant current drive. In addition, the constant current drive can ignore the magnetic resistance effect and has better linearity against the magnetic flux density at high magnetic field. The linearity of 2% or lower defined in the specifications is achieved by the constant current drive.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0402]
・How should we choose the best one, from the standard type to the ultra-sensitive type?
A.
・As the type is graded up from the standard type to the ultra-sensitive type, both the constant voltage sensitivity and constant current sensitivity increase. Refer to the graphs and table below. However, since the input/output resistance values also increase, it is necessary to be careful of the circuit matching suchas the amplifier rate. The standard type is the best in temperature characteristics of the hall element outputvoltage and unbalanced voltage, and the ultra-sensitive type is the worst.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.