参数资料
型号: AG910-07E
厂商: NVE Corp/Sensor Products
文件页数: 105/145页
文件大小: 0K
描述: KIT EVALUATION GMR SWITCH
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:
已供物品: 3 个板,CD,磁体,样品,8-MSOP 插口
已用 IC / 零件: AD 系列开关
相关产品: AD004-00E-ND - SENSOR MAG SW 20G STNDRD 8-MSOP
AD122-00-ND - SENSOR MAG SW 40G CROS AX 8-MSOP
AD105-00-ND - SENSOR MAG SW 40G STANDRD 8-MSOP
391-1018-ND - SENSOR MAG SW 10G CRS AXS 8-MSOP
391-1012-ND - SENS MAG SW 28G CROS AXIS 8-MSOP
391-1010-ND - SENS MAG SW 40G CROS AXIS 8-MSOP
391-1009-ND - SENS MAG SW 20G CROS AXIS 8-MSOP
391-1008-ND - SENSOR MAG SW 28G STNDRD 8-MSOP
391-1006-ND - SENSOR MAG SW 40G STNDRD 8-MSOP
391-1005-ND - SENSOR MAG SW 20G STNDRD 8-MSOP
其它名称: 391-1061
Application Notes
Noise In NVE Giant Magnetoresistive Sensors
The 1/f noise characteristic of NVE GMR sensors is approximately an order of magnitude higher than
noise for thin film resistors. The noise has been shown to follow the usual characteristics of being
proportional to the square of the current density. The figure below shows a noise plot of an AA002-02
sensor using various methods for powering the sensor:
100000
AA002-02 Spectrum Analysis 6/10/98
9V Battery
10000
1000
100
10
1.616 mA
18V Battery
3.233 mA
479 nA Blue
Box
498 uA Blue
Box
2.003 mA
Blue Box
0.01
0.1
1
10
100
1000
10000
100000
Log Frequency (Hz)
For use in low-field applications, the noise of the NVE GMR sensors limits the minimum signal
detected. For measuring low fields it is recommended that an AC modulation/demodulation scheme be
implemented. The figure below shows a block diagram of an AC modulation/demodulation circuit.
The phase shifter block is required to account for parasitic phase shift around the loop.
PHASE SHIFTER
SINE WAVE
GENERATOR
8 Vin+
5 Vout+
+
IN2
1 Vout-
RG
RG1
RG2
INST AMP
IN1
OUT
Rf
Vout
4 Vin-
-
Cf
- 105 -
www.nve.com phone: 952-829-9217 fax: 952-829-9189
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