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参数资料
| 型号： | US1881LUA-AAA-000-BU |
| 厂商： | Melexis Technologies NV |
| 文件页数： | 23/46页 |
| 文件大小： | 498K |
| 描述： | IC LATCH CMOS MP TO-92UA |
| 产品目录绘图： | UA-92 Series Side |
| 标准包装： | 1,000 |
| 传感范围： | 9.5mT 跳闸，-9.5mT 释放 |
| 类型： | 双极卡锁 |
| 电源电压： | 3.5 V ~ 24 V |
| 电流 - 电源： | 5mA |
| 电流 - 输出（最大）： | 50mA |
| 输出类型： | 数字式，开漏极 |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | TO-226-3，TO-92-3 短体 |
| 供应商设备封装： | TO-92UA |
| 包装： | 散装 |
| 产品目录页面： | 2792 (CN2011-ZH PDF) |
| 其它名称： | US1881LUA US1881LUA-ND |
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3-31
Graph 4, Slide-by With Magnet B, Steep Slope
The effects of mechanical tolerance on a Hall Effect System have just been illustrated. Temperature range
can also affect this system. Temperature will expand or contract the mechanical assembly, but will also
affect the field strength of the magnet and the distance from BOP t BRP of the Hall IC. The Neodymium
sample magnets used in this kit have a temperature coefficient of -).1098%/0C. This means that as tem-
perature increases by one degree Celsius, the Flux Density will decrease by 0.1098%.
Graph 5, Effects of Temperature on Flux Density
Due to the temperature coefficient, the magnet will have a difference in flux density of 30% and a change
in activation distance of 1mm over this range of temperature. This may not appear tobe a significant dif-
ference in field strength or distance, but in conjunction with other mechanical factors, temperature could
become a factor.
Design Example 2: Now that Design Example 1 illustrated the effects of mechanical, magnetic and Hall
IC tolerances within a Hall Effect System. Design Example 2 illustrates how they produce tolerance
buildup.
Tolerances:
Air Gap Tolerance = 2mm +0.5mm
US5881EUA BOP/BRP Range = 90G min. BRP to 300G max. BOP
(IC Temperature Selection (EUA) = -40oC to 85oC)
Temperature Range =-40oC to 85oC
Magnet Temp. Coefficient = -0.1098%/oC
Section 3 - Applications
0
100
200
300
400
500
600
0
2
4
6
8
10
12
Distance (mm)
Air Gap = 2 mm
Air Gap = 3 mm
Air Gap = 4 mm
Always "ON"
Always "OFF"
Always "ON"
Always "OFF"
0
100
200
300
400
500
600
700
0
5
10
15
20
Distance mm
Flux Denisity @ 25C
Flux Denisity @ -40C
Flux Denisity @ 85C
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