A3515LUA データシートの表示（PDF） - Allegro MicroSystems

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A3515LUA

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMPERATURE OPERATION

Allegro MicroSystems 

3515 AND 3516

RATIOMETRIC,

LINEAR

HALL-EFFECT SENSORS

APPLICATIONS INFORMATION

SENSOR LOCATION

Calibrated linear Hall devices, which can be used to deter-

mine the actual flux density presented to the sensor in a particu-

lar 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 µF 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 A3515xUA and A3516xUA 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 excur-

sions, beyond the Absolute Maximum Ratings, to

TA = 170°C provided the junction temperature, TJ, 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

ACTIVE AREA DEPTH

0.0195"

0.50 mm

NOM

SUFFIX “UA”

0.081"

2.06 mm

0.056"

1.42 mm

A

BRANDED

SURFACE 1

2

3

Dwg. MH-011-7A

Allegro

TYPICAL CURRENT-SENSING APPLICATION

B ≈ N x 6.9 G/A

Dwg. AH-005A

www.allegromicro.com

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