LINEAR MAGNETIC FIELD SENSORS
Magnetic
Magnetic
SensorS
Sensors
V+
V+
4
650
+5V
+5V
1.5nF#
TLC2543
12 bit A/D
1
R1*
R2*
5
2
3
8
20
-
+
1
6
V+
CLK
+5V
X
2
AIN0
AIN1
18
17
2
AMP04
1,6
5
DIN
Vref
16
15
14
13
10
DOUT
NCS
EOC
HMC1002
Ref+
650
11
Ref-
Gnd
1.5nF#
19
1
R3*
R4*
9
8
2
3
-
+
6
12
Y
+5V
AMP04
8,13
5
25K
Vref
20
LM440
2.5V
1.6
1.6
14
7,18
16
MAX662A
3
4
2
* R1-R4 used to trim offest
# provides 1KHz rolloff
C2-
C1+
+
0.22µF
0.22µF
+
1
5
8
C2+
C1-
Vcc
+5V
12V
6
4.7µF
Vout SHDN
4.7µF
tantalum
1K
+
7
GND
4.7µF
25K
3
4
2
0.1µF
0.2µF
0.1µF
5,6
7,8
SR
Rst
Set
Rst
Signal input
5V
Signal should be in Rst
state when idle
1
Manual Switch
Figure 20—Two-Axis Sensor With Set/Reset Circuit and Digital Interface
+5V
-
+
10
10
0
0
K
K
Vref
LM324a
0 .1 u F
Magnetic
Magnetic
Sensors
Sensor
Vb
-
-
+
+
LM324b
Vref
Sel 1
Sel 2
Vb
-
-
+
+
LM324c
A B
Vref
0X
1X
0.1µF
0.1
F
-
+
Output
X
utpu
O
t
Vref
2X
3X
0.1µF
0.1
S/R straps
F
4052
Vr ef
Vref
Vb
S/R Control
-
-
+
+
LM324d
HMC1001
S/R strap
Vref
0.1µF
0.1
F
200
+5V
1µF
1
F
S/R
NDC7001 or
equiv.
Figure 21—Three-Axis Low Cost Magnetic Sensor
13
HONEYWELL [ Honeywell ]
