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參數(shù)資料
| 型號： | HMC1052 |
| 廠商： | Honeywell International Inc. |
| 英文描述： | 2- Axis Magnetic Sensors(兩軸磁場傳感器) |
| 中文描述： | 2 -軸磁傳感器（兩軸磁場傳感器） |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 398K |
| 代理商： | HMC1052 |
HMC1051 / HMC1052
SENSOR PRODUCTS
Web Sites:
www.magneticsensors.com
www.ssec.honeywell.com
Honeywell
Solid State Electronics Center
12001 State Highway 55
Plymouth, Minnesota 55441-4799
Email: ssec.customer.service@honeywell.com
2001 HMC1051/1052 Published Jul 2001 Page 6
1-800-323-8295
Alternating or Direct Current Sensing
The HMC1051 and HMC1052 sensors can be utilized in a novel way for moderate to high current sensing
applications using a nearby external conductor providing the sensed magnetic field to the bridge. Figure 5 shows a
HMC1051Z used as a current sensor with thermistor element performing a temperature compensation function for
greater accuracy over a wide range of operational temps. Selection of the temperature compensation (tempco)
resistors used depends on the thermistor chosen and is dependant on the thermistor’s %/°C shift of resistance. For
best op-amp compatibility, the thermistor resistance should be above about 1000 ohms. The use of a 9-volt alkaline
battery supply permits fairly common operational amplifiers such as the 4558 types to be used. Note that the circuit
must be calibrated based on the final displacement of the sensed conductor to the measuring bridge. Typically, an
optimally oriented measurement conductor can be placed about one centimeter away from the bridge and have
reasonable capability of measuring from tens of milliamperes to beyond 20 amperes of alternating or direct currents.
See application note AN-209 for the basic principles of current sensing using AMR bridges.
HMC1051
U1
Vcc
5.0v
offset
set/reset
.1uf
set/reset
Vcc/2
5.00k
5.00k
500k
500k
TLC072
TLC072
.1 f
U2
+
-
+
-
Vcc
10k
10k pot
Threshold Set
R
LED
LED
output
Figure 4
+
-
1 f*
*
Low ESR Tantalum
FMMT717
FMMT617
10k
10k
Vcc
200
0.1 f
0.1 f
R
S
HMC1051
U1
Vcc = 9Vdc
offset
set/reset
.1uf
set/reset
Vcc/2 ~ +4.5Vdc
5.00k
5.00k
500k
500k
RC4558
RC4458
.1 f
U2
+
-
+
-
Figure 5
+
-
1 f*
*
Low ESR Tantalum
Vcc =9Vdc
200
Conductor to be
Current Measured
I
dc
I
ac
R
b
R
a
R
th
tempco
network
standoff distance
output
Si1553DL
U3
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