參數(shù)資料
型號(hào)： HAL815E
廠商： MICRONAS SEMICONDUCTOR HOLDING AG
英文描述： Programmable Linear Hall Sensor
中文描述： 可編程線性霍爾傳感器
文件頁(yè)數(shù)： 17/24頁(yè)
文件大?。?/td> 407K
代理商： HAL815E
ADVANCE INFORMATION
HAL815
Micronas
17
4. Application Notes
4.1. Application Circuit
For EMC protection, it is recommended to connect one
ceramic 4.7 nF capacitor each between ground and
the supply voltage, respectively the output voltage pin.
In addition, the input of the controller unit should be
pulled-down with a 4.7 kOhm resistor and a ceramic
4.7 nF capacitor.
Please note that during programming, the sensor will
be supplied repeatedly with the programming voltage
of 12 V for 100 ms. All components connected to the
V
DD
line at this time must be able to resist this voltage.
Fig. 4–1:
Recommended application circuit
4.2. Use of two HAL 815 in Parallel
Two different HAL 815 sensors which are operated in
parallel to the same supply and ground line can be pro-
grammed individually. In order to select the IC which
should be programmed, both Hall ICs are inactivated
by the “Deactivate” command on the common supply
line. Then, the appropriate IC is activated by an “Acti-
vate” pulse on its output. Only the activated sensor will
react to all following read, write, and program com-
mands. If the second IC has to be programmed, the
“Deactivate” command is sent again, and the second
IC can be selected.
Fig. 4–2:
Parallel operation of two HAL 815
4.3. Temperature Compensation
The relationship between the temperature coefficient
of the magnet and the corresponding TC and TCSQ
codes for linear compensation is given in the following
table. In addition to the linear change of the magnetic
field with temperature, the curvature can be adjusted
as well. For this purpose, other TC and TCSQ combi-
nations are required which are not shown in the table.
Please contact Micronas for more detailed information
on this higher order temperature compensation.
The HAL 800 and HAL 815 contain the same tempera-
ture compensation circuits. If an optimal setting for the
HAL 800 is already available, the same settings may
be used for the HAL 815.
OUT
V
DD
GND
4.7 nF
HAL815
4.7 k
μ
C
4.7 nF
4.7 nF
HAL 815
Sensor B
GND
10 nF
HAL 815
Sensor A
4.7 nF
4.7 nF
V
DD
OUT B & Select B
OUT A & Select A
Temperature
Coefficient of
Magnet (ppm/K)
TC
TCSQ
400
31
6
300
28
7
200
24
8
100
21
9
0
18
10
50
17
10
90
16
11
130
15
11
170
14
11
200
13
12
240
12
12
280
11
12
320
10
13
360
9
13
410
8
13
450
7
13
500
6
14
550
5
14
600
4
14
650
3
14
700
2
15
750
1
15
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