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| 型号： | AG920-07E |
| 厂商： | NVE Corp/Sensor Products |
| 文件页数： | 83/145页 |
| 文件大小： | 0K |
| 描述： | KIT EVALUATION GT SENSOR |
| 标准包装： | 1 |
| 传感器类型： | 磁性 GMR（大型磁阻传感） |
| 接口： | 模拟 |
| 嵌入式： | 否 |
| 已供物品： | 9 个板，CD，磁体，样品，焊膏 |
| 已用 IC / 零件： | ABL 和 AKL 系列 GT 传感器 |
| 产品目录页面： | 2839 (CN2011-ZH PDF) |
| 相关产品： | 391-1058-5-ND - SENSOR GEAR TOOTH DUAL 8MSOP 391-1057-5-ND - SENSOR GEAR TOOTH DUAL 8MSOP 391-1056-5-ND - SENSOR GEAR TOOTH SINGLE 8MSOP 391-1055-5-ND - SENSOR GEAR TOOTH SINGLE 8MSOP 391-1036-5-ND - SENSOR GEAR TOOTH DUAL 8MSOP 391-1035-5-ND - SENSOR GEAR TOOTH DUAL 8MSOP 391-1034-5-ND - SENSOR GEAR TOOTH SINGLE 8MSOP 391-1033-5-ND - SENSOR GEAR TOOTH SINGLE 8MSOP |
| 其它名称： | 391-1063 |
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Application Notes
This change in resistance is the GMR effect.
The size of the resistance decrease is typically 4% to over 20%, depending on the material structure of
the GMR films . Most of NVE’s sensor products rely on a GMR material which exhibits 14% to 16%
decrease in resistance. The “percent GMR” of a given material is calculated using the following
formula:
% GMR = Change in Resistance / Minimum Resistance
For example, assume an electrical resistor is implemented with GMR material, and it shows a nominal
resistance of 5000 Ohms. Then a magnetic field is applied and with this field a minimum resistance of
4400 Ohms is achieved. The percent GMR is then 600/4400, or about 13.6%.
Not all GMR materials operate in the manner described above. All GMR materials rely on modulating
the difference between the magnetization directions of adjacent layers in the GMR film structure, but
some achieve this modulation in different ways. The other most common type of GMR material is
referred to as a “spin valve” GMR material. This type of material does not necessarily rely on anti-
ferromagnetic coupling of the adjacent magnetic layers in the GMR film. In this case one of the
magnetic layers is “pinned,” or fixed with respect to its magnetization direction. The magnetization
direction of the pinned layer will not move when exposed to normal operating magnetic fields.
Therefore, the externally applied magnetic field will modulate the direction of the other magnetic
layer, referred to as the “free” layer. As the angle between the free layer and the pinned layer varies,
the mean free path length of the electrons in the GMR film also varies, and therefore the electrical
resistance will change.
Fixing the magnetization direction of the pinned layer in spin valve GMR materials can be done in a
variety of ways. However, it is important that the layer is pinned in a robust manner; otherwise, the
pinning can be undone by application of a large magnetic field. This will destroy the operation of the
sensor. NVE uses the application of large magnetic fields and high anneal temperatures (over 240°C)
to set the pinned layer of the film. This layer cannot be unpinned with the application of any magnetic
field in the normal temperature range of operation. Therefore, the sensor cannot be damaged by large
magnetic fields. This is also true of NVE’s other GMR sensors; no damage to any NVE GMR sensor
product can result due to the application of extremely large magnetic fields.
One of NVE’s competitors in Europe introduced a GMR sensor in 1997 that could be damaged by
magnetic fields in the 250 Gauss range. This product has since been discontinued.
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www.nve.com phone: 952-829-9217 fax: 952-829-9189
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AG921-07E | 功能描述:AKL002-12E - Magnetic, GMR (Giant Magnetoresistive) Sensor Evaluation Board 制造商:nve corp/sensor products 系列:- 零件状态:有效 传感器类型:磁性，GMR（大型磁阻传感） 感应范围:- 接口:模拟 灵敏度:- 电压 - 电源:- 嵌入式:- 所含物品:板 使用的 IC/零件:AKL002-12E 标准包装:1 |
| AG930-07E | 制造商:NVE Corporation 功能描述:TMR ANGLE SENSOR EVAL BOARD 制造商:NVE Corporation 功能描述:EVAL BOARD, AAT001-10E ANGLE SENSOR; Silicon Manufacturer:NVE; Silicon Core Number:AAT001-10E; Kit Application Type:Sensing - Magnetic, Compass; Application Sub Type:Magnetic Sensor; Kit Contents:Eval Board AAT001-10E |
| AG931-07E | 功能描述:AAT003-10E - Magnetic, Rotary Position Sensor Evaluation Board 制造商:nve corp/sensor products 系列:- 零件状态:新产品 传感器类型:磁性，旋转位置 感应范围:- 接口:模拟 灵敏度:- 电压 - 电源:1.5 V ~ 5.5 V 嵌入式:- 所含物品:板 使用的 IC/零件:AAT003-10E 标准包装:1 |
| AG932-07E | 功能描述:ADT001-10E, ADT002-10E - Magnetic, Rotary Position Sensor Evaluation Board 制造商:nve corp/sensor products 系列:- 零件状态:在售 传感器类型:磁性，旋转位置 感应范围:- 接口:模拟 灵敏度:- 电压 - 电源:2.4 V ~ 5.5 V 嵌入式:- 所含物品:板，磁铁 使用的 IC/零件:ADT001-10E，ADT002-10E 标准包装:1 |
| AG933-07E | 功能描述:AAT009-10E - Magnetic, Rotary Position Sensor Evaluation Board 制造商:nve corp/sensor products 系列:- 零件状态:新产品 传感器类型:磁性，旋转位置 感应范围:- 接口:模拟 灵敏度:- 电压 - 电源:1.5 V ~ 5.5 V 嵌入式:- 所含物品:板 使用的 IC/零件:AAT009-10E 标准包装:1 |
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