A3241 ALLEGRO [Allegro MicroSystems], A3241 Datasheet

A3241

Manufacturer Part Number

A3241

Description

Chopper-Stabilized Unipolar Hall-Effect Switches

Manufacturer

ALLEGRO [Allegro MicroSystems]

Datasheet

1.A3241.pdf (12 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

A3241LUA

Manufacturer:

YICHENG

Quantity:

10 000

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A3241-DS, Rev. 2

Supply Voltage, V

Reverse-Supply Voltage, V

Reverse-Supply Current, I

Output Off Voltage, V

Output Current, I

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

Operating Temperature

Storage Temperature, T

Ambient, T

Maximum Junction, T

AB SO LUTE MAX I MUM RAT INGS

Package LH, 3-pin Surface Mount

Package UA, 3-pin SIP

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

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

OUTSINK

.......................................... 28 V

OUT

.................. –65ºC to 170ºC

........... Internally Limited

J(MAX)

RCC

.................................. 28 V

RCC

........................–2 mA

........................ –18 V

......................165ºC

1 2

A3241 and A3242

The A3241 and A3242 integrated circuits are unipolar Hall-effect switches with

digital outputs. These sensors are suited for operation over extended temperature

ranges, up to +150°C. Superior high-temperature performance is made pos-

sible through an Allegro

the residual offset voltage normally caused by device overmolding, temperature

excursions, and thermal stress.

The A3241 and A3242 Hall-effect switches include the following on a single

silicon chip: voltage regulator, Hall-voltage generator, small-signal ampliﬁ er,

chopper stabilization, Schmitt trigger, and a short circuit protected open-drain

output. Advanced BiCMOS wafer fabrication processing is used to take advantage

of low-voltage requirements, component matching, very low input-offset errors,

and small component geometries.

The integrated voltage regulator permits operation from 3.6 to 24 V. The unipolar

family members operate with a sufﬁ cient south polarity ﬁ eld only, turning off in

the absence of such a south polarity ﬁ eld.

The A3241 and A3242 are 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 tem-

perature range. The small geometries of the BiCMOS process allow these devices

to be provided in ultrasmall packages. The package styles available provide mag-

netically optimized solutions for most applications. Package LH is an SOT23W,

a miniature low-proﬁ le surface-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.

Features and Beneﬁ ts

Chopper stabilization

Reverse battery protection

Superior temperature stability

Extremely low switchpoint drift

Insensitive to physical stress

Unipolar Hall-Effect Switches

patented dynamic offset cancellation, which reduces

Chopper-Stabilized

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com

Output short circuit protection

Solid state reliability

Small size

Robust EMC capability

High ESD ratings (HBM)

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