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參數(shù)資料
| 型號(hào)： | A3518SUA |
| 廠(chǎng)商： | Allegro MicroSystems, Inc. |
| 英文描述： | RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMPERATURE OPERATION |
| 中文描述： | 比例，線(xiàn)性霍爾效應(yīng)傳感器高溫作業(yè) |
| 文件頁(yè)數(shù)： | 9/13頁(yè) |
| 文件大小： | 305K |
| 代理商： | A3518SUA |
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3517
AND
3518
RATIOMETRIC,
LINEAR HALL-EFFECT SENSORS
FOR HIGH-TEMP. OPERATION
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
8
APPLICATIONS INFORMATION
Calibrated linear Hall devices, which can be used to
determine the actual flux density presented to the sensor in a
particular application, are available.
For safe, reliable operation, the output should not be pulled
above the supply voltage or pulled below the device ground.
For optimum performance, a 0.1
μ
F capacitor between the
supply and ground, and a 100 pF capacitor between the output
and ground, should be added.
The ratiometric feature is especially valuable when these
devices are used with an analog-to-digital converter. A/D
converters typically derive their LSB step size by ratioing off a
reference voltage line. If the reference voltage varies, the LSB
will vary proportionally. This is a major error source in many
sensing systems. The A3517xUA and A3518xUA can eliminate
this source of error by their ratiometric operation. Because their
gain and offsets are proportional to the supply voltage, if they
are powered from the A/D reference voltage, the sensor output
voltage will track changes in the LSB value.
These devices can withstand infrequent temperature
excursions, beyond the Absolute Maximum Ratings, to
T
= 170
°
C provided the junction temperature, T
J
, does not
exceed 200
°
C.
Extensive applications information on Hall-effect sensors
and magnets is also available in the “Hall-Effect IC Applications
Guide”, which can be found in the latest issue of the
Allegro
MicroSystems Electronic Data Book
, AMS-702 or
Application
Note
27701, or at
www.allegromicro.com
TYPICAL CURRENT-SENSING APPLICATION
B
≈
N x 6.9 G/A
Dwg. AH-005A
1
3
2
Dwg. MH-011-7A
0.0195"
0.50 mm
NOM
BRANDED
SURFACE
ACTIVE AREA DEPTH
0.081"
2.06 mm
0.056"
1.42 mm
A
Allegro
SENSOR LOCATION
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