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參數(shù)資料
| 型號： | AD22151YRZ-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 磁阻傳感器 |
| 英文描述： | MAGNETIC FIELD SENSOR-HALL EFFECT, -60-60mT, 0.45-5.40V, RECTANGULAR, SURFACE MOUNT |
| 封裝： | MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 264K |
| 代理商： | AD22151YRZ-REEL |
REV. A
–6–
AD22151
Knowing the values of R3 and R4 and noting Equation 2, the
parallel combination of R2 and R4 required is:
85
15 1
6 071
k
–
.
()
=
Thus:
R
kk
k
2
1
6 071
1
141 666
6 342
=
=
.
–
.
NOISE
The principal noise component in the sensor is thermal noise
from the Hall cell. Clock feedthrough into the output signal is
largely suppressed with application of a supply bypass capacitor.
Figure 12 shows the power spectral density (PSD) of the output
signal for a gain of 5 mV/Gauss. The effective bandwidth of the
sensor is approximately 5.7 kHz, as shown in Figure 13. The
PSD indicates an rms noise voltage of 2.8 mV within the 3 dB
bandwidth of the sensor. A wideband measurement of 250 MHz
indicates 3.2 mV rms (see Figure 14a).
In many position sensing applications, bandwidth requirements
can be as low as 100 Hz. Passing the output signal through a
100 Hz LP filter, for example, would reduce the rms noise volt-
age to
1 mV. A dominant pole may be introduced into the
output amplifier response by connection of a capacitor across
feedback resistor R3 as a simple means of reducing noise at the
expense of bandwidth. Figure 14b indicates the output signal of
a 5 mV/G sensor bandwidth limited to 180 Hz with a 0.01
F
feedback capacitor.
Note: Measurements were taken with a 0.1
F decoupling
capacitor between VCC and GND at 25
°C.
LOGMAG
5 dB/div
100 H
1 H
START: 64Hz
NOISE: PSD (8mV/GAUSS)
STOP: 25.6kHz
RMS: 64
B MARKER
64Hz
Y: 3.351 H
Figure 12. Power Spectral Density (5 mV/G)
GAIN – mV/Gauss
23
4
56
FREQ
UENCY
–
kHz
0
2
3
4
5
1
6
7
1
3dB FREQUENCY (kHz)
Figure 13. Small Signal Gain Bandwidth vs. Gain
CH2 10.0mV
BW M2.00ms
[
T
3ACQS
CH2 p-p
19.2mV
TEK STOP: 25.0 kS/s
Figure 14a. Peak-to-Peak Full Bandwidth (10 mV/Division)
BW M2.00ms
[
T
7ACQS
CH2 p-p
4.4mV
TEK STOP: 25.0 kS/s
CH2 10.0mV
Figure 14b. Peak-to-Peak 180 Hz Bandwidth
(10 mV/Division)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD22151YR-REEL | MAGNETIC FIELD SENSOR-HALL EFFECT, -60-60mT, 0.45-5.40V, RECTANGULAR, SURFACE MOUNT |
| AD239-12 | 750 MHz - 2000 MHz RF/MICROWAVE VARIABLE ATTENUATOR, 2.1 dB INSERTION LOSS-MAX |
| AD239-12 | 750 MHz - 2000 MHz RF/MICROWAVE VARIABLE ATTENUATOR, 2.1 dB INSERTION LOSS-MAX |
| AD310-25 | 0.3 MHz - 2000 MHz RF/MICROWAVE VARIABLE ATTENUATOR, 2.5 dB INSERTION LOSS-MAX |
| AD310-25 | 0.3 MHz - 2000 MHz RF/MICROWAVE VARIABLE ATTENUATOR, 2.5 dB INSERTION LOSS-MAX |
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