A3517LUA Allegro MicroSystems, A3517LUA Datasheet - Page 8

• Manufacturer Part Number: A3517LUA
• Description: RATIOMETRIC/ LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMPERATURE OPERATION
• Manufacturer: Allegro MicroSystems

determine the actual flux density presented to the sensor in a
particular application, are available.
above the supply voltage or pulled below the device ground.
supply and ground, and a 100 pF capacitor between the output
and ground, should be added.
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.
excursions, beyond the Absolute Maximum Ratings, to
T
exceed 200°C.
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
A
3517
RATIOMETRIC,
LINEAR HALL-EFFECT SENSORS
FOR HIGH-TEMP. OPERATION
= 170°C provided the junction temperature, T
Calibrated linear Hall devices, which can be used to
For safe, reliable operation, the output should not be pulled
For optimum performance, a 0.1 µF capacitor between the
The ratiometric feature is especially valuable when these
These devices can withstand infrequent temperature
Extensive applications information on Hall-effect sensors
AND
www.allegromicro.com
3518
J
, does not
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
ACTIVE AREA DEPTH
B ≈ N x 6.9 G/A
BRANDED
SURFACE
0.018"
0.46 mm
NOM
Allegro
A
1
2
2.06 mm
0.081"
Dwg. AH-005A
3
Dwg. MH-011-7
1.42 mm
0.056"