A3282 查看數據表（PDF） - Allegro MicroSystems

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A3282

Chopper-Stabilized Hall Effect Latch

Allegro MicroSystems 

A3282

Chopper-Stabilized Hall Effect Latch

Package LH, 3-pin Surface Mount

3

1

3

2

1

2

Package UA, 3-pin SIP

1

2

3

The A3282 Hall-effect sensor is a temperature stable, stress-resistant latch. Supe-

rior high-temperature performance is made possible through an Allegro® pat-

ented dynamic offset cancellation that utilizes chopper-stabilization. This method

reduces the offset voltage normally caused by device overmolding, temperature

dependencies, and thermal stress. The A3282 complements the current Allegro

family of chopper-stabilized latching sensors.

The A3282 includes the following on a single silicon chip: voltage regulator, Hall-

voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger,

and a short circuit protected open-drain output. Advanced BiCMOS wafer fabrica-

tion processing is used to take advantage of low-voltage requirements, component

matching, very low input-offset errors, and small component geometries.

This device requires the presence of both south and north polarity magnetic fields

for operation. In the presence of a south polarity field of sufficient strength, the

device output latches on, and only switches off when a north polarity field of suf-

ficient strength is present.

The A3282 is rated for operation between the ambient temperatures –40°C and

85°C for the E temperature range, and –40°C to 150°C for the L temperature

range. The two package styles available provide magnetically optimized solutions

for most applications. Package LH is an SOT23W, a miniature low-profile sur-

face-mount package, while package UA is a three-lead ultramini SIP for through-

hole mounting. Each package is available in a lead (Pb) free version, with 100%

matte tin plated leadframes.

123

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, VCC .......................................... 28 V

Reverse-Supply Voltage, VRCC ........................ –18 V

Output Off Voltage, VOUT............................... 26.5 V

Output Current, IOUTSINK........... Internally Limited

Reverse-Output Current, IROUT ....................–10 mA

Magnetic Flux Density, B .........................Unlimited

Operating Temperature

Ambient, TA, Range E.................. –40ºC to 85ºC

Ambient, TA, Range L................ –40ºC to 150ºC

Maximum Junction, TJ(MAX)......................165ºC

Storage Temperature, TS .................. –65ºC to 170ºC

Features and Benefits

Chopper stabilization

Superior temperature stability

Extremely low switchpoint drift

Insensitive to physical stress

Reverse battery protection

A3282-DS

Output short circuit protection

Solid state reliability

Small size

Robust EMC capability

High ESD ratings (HBM)

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

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