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| 型号： | US2881ESO |
| 厂商： | Melexis Technologies NV |
| 文件页数： | 37/46页 |
| 文件大小： | 498K |
| 描述： | IC LATCH CMOS H-S SOT-23 |
| 标准包装： | 1 |
| 传感范围： | 4.5mT 跳闸，-4.5mT 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 ~ 85°C |
| 封装/外壳： | TO-236-3，SC-59，SOT-23-3 |
| 供应商设备封装： | SOT-23 |
| 包装： | 剪切带 (CT) |
| 其它名称： | US2881ESOCT |
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3-23
Section 3 - Applications
Geartooth Sensor
Magnetic Geartooth Sensing
The need to sense speed and position of ferrous gears occurs in numerous industries. The ability to con-
vert the repetitive passing teeth to an electrical impulse has been sought for many decades. purely
mechanical systems have been used with the attendant issue of wear and failure limiting its use to low
speed and low duty cycle applications.
Hall-Effect geartooth sensing makes use of the Hall element to sense the variation in flux found in the air-
gap between a magnet and passing ferrous gearteeth. A modern approach is to convert the signal from the
Hall element to a digital value and then perform signal processing to create a digital output from that
effort. In the case of the Melexis geartooth sensing scheme each time the signal changes direction a
counter is reset. If the signal level changes beyond the preset magnitude from the positive or negative peak
the output level is changed. This creates a digital zero speed peak detection speed sensor. It is immune to
orientation requirements and cab follow the gear speed down to the cessation of motion. It will detect the
first edge of the next tooth after immediately after power on. The digital signal processing does introduce
an uncertainty from quantization that is greater at larger speeds. Extremely demanding timing require-
ments like those found in crank position sensors may suffer from the loss of accuracy at high speeds.
Figure 24 shows the Melexis MLX90217 geartooth sensor operation.
Figure 24, Geartooth Sensor
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相关代理商/技术参数 |
参数描述 |
|---|---|
| US2881EUA | 制造商:MELEXIS 制造商全称:Melexis Microelectronic Systems 功能描述:Bipolar Hall Switch - Very High Sensitivity |
| US2881EUA-AAA-000-BA | 制造商:Melexis Semiconductors 功能描述:IC HALL EFFECT SWITCH BIP TO-92 |
| US2881EUA-AAA-000-BU | 功能描述:IC LATCH CMOS H-SEN TO-92UA RoHS:是 类别:传感器，转换器 >> 磁性 - 霍尔效应，数字式开关，线性，罗盘 (IC) 系列:- 标准包装:1 系列:- 传感范围:20mT ~ 80mT 类型:旋转 电源电压:4.5 V ~ 5.5 V 电流 - 电源:15mA 电流 - 输出（最大）:- 输出类型:数字式，PWM，8.5 位串行 特点:可编程 工作温度:-40°C ~ 150°C 封装/外壳:20-SSOP（0.209"，5.30mm 宽） 供应商设备封装:20-SSOP 包装:Digi-Reel® 其它名称:AS5132-HSST-500DKR |
| US2881LSE | 制造商:MELEXIS 制造商全称:Melexis Microelectronic Systems 功能描述:Bipolar Hall Switch - Very High Sensitivity |
| US2881LSE-AAA-000-RE | 功能描述:IC LATCH CMOS H-S TSOT-3L RoHS:是 类别:传感器，转换器 >> 磁性 - 霍尔效应，数字式开关，线性，罗盘 (IC) 系列:- 标准包装:1 系列:- 传感范围:20mT ~ 80mT 类型:旋转 电源电压:4.5 V ~ 5.5 V 电流 - 电源:15mA 电流 - 输出（最大）:- 输出类型:数字式，PWM，8.5 位串行 特点:可编程 工作温度:-40°C ~ 150°C 封装/外壳:20-SSOP（0.209"，5.30mm 宽） 供应商设备封装:20-SSOP 包装:Digi-Reel® 其它名称:AS5132-HSST-500DKR |
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