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HAL880 参数 Datasheet PDF下载

HAL880图片预览
型号: HAL880
PDF下载: 下载PDF文件 查看货源
内容描述: 可编程线性霍尔效应传感器 [Programmable Linear Hall-Effect Sensor]
分类和应用: 传感器
文件页数/大小: 34 页 / 1764 K
品牌: MICRONAS [ MICRONAS ]
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DATA SHEET  
HAL880  
4. Application Notes  
4.2. Use of two HAL880 in Parallel  
4.1. Application Circuit  
Two different HAL880 sensors which are operated in  
parallel to the same supply and ground line can be  
programmed individually. In order to select the IC  
which should be programmed, both Hall ICs are  
inactivated by the “Deactivate” command on the com-  
mon supply line. Then, the appropriate IC is activated  
by an “Activate” pulse on its output. Only the activated  
sensor will react to all following read, write, and pro-  
gram commands. If the second IC has to be pro-  
grammed, the “Deactivate” command is sent again  
and the second IC can be selected.  
For EMC protection, it is recommended to connect one  
ceramic 4.7 nF capacitor each between ground and  
the supply voltage, respectively the output voltage pin.  
In addition, the input of the controller unit should be  
pulled-down with a 10 kΩ resistor and a ceramic  
4.7 nF capacitor.  
Please note that during programming, the sensor will  
be supplied repeatedly with the programming voltage  
of 12.5 V for 100 ms. All components connected to the  
VDD line at this time must be able to resist this voltage.  
Note: The multi-programming of two sensors works  
only if the outputs of the two sensors are pulled  
to GND with a 10 kΩ pull-down resistor.  
V
DD  
V
DD  
OUT  
HAL880  
μC  
4.7 nF  
OUT A & Select A  
OUT B & Select B  
4.7 nF  
4.7 nF  
10 kΩ  
GND  
HAL880  
HAL880  
Sensor A  
Sensor B  
10 nF  
Fig. 4–1: Recommended application circuit  
4.7 nF  
4.7 nF  
GND  
Fig. 4–2: Parallel operation of two HAL880  
Micronas  
Feb. 23, 2009; DSH000152_001EN  
23