A3241EUA-T Allegro Microsystems Inc, A3241EUA-T Datasheet

A3241EUA-T

Manufacturer Part Number

A3241EUA-T

Description

IC SWITCH HALL EFFECT 3-SIP

Manufacturer

Allegro Microsystems Inc

Type

Unipolar Switchr

Datasheets

1.A3241ELHLT-T.pdf (13 pages)

2.A3241EUA-T.pdf (12 pages)

Specifications of A3241EUA-T

Sensing Range

135G Trip, 40G Release

Voltage - Supply

3.6 V ~ 24 V

Current - Supply

3.5mA

Output Type

Digital, Open Drain

Features

Regulated Voltage

Operating Temperature

-40°C ~ 85°C

Package / Case

3-SIP

Magnetic Type

Unipolar

Operating Supply Voltage (min)

3.6V

Operating Supply Voltage (typ)

5/9/12/15/18V

Operating Supply Voltage (max)

24V

Mag Sensor Operate Point (g)

135Gs

Mag Sensor Release Point (g)

40Gs

Mag Sensor Hysteresis(g)

25Gs

Package Type

Ultra Mini SIP

Pin Count

Mounting

Through Hole

Operating Temp Range

-40C to 85C

Operating Temperature Classification

Industrial

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current - Output (max)

Lead Free Status / RoHS Status

Compliant, Lead free / RoHS Compliant

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Features and Benefits

▪ Chopper stabilization

▪ Reverse battery protection

▪ Output short circuit protection

▪ Solid state reliability

▪ Small size

▪ Robust EMC capability

▪ High ESD ratings (HBM)

Packages: 3 pin SOT23W (suffix LH), and

3 pin SIP (suffix UA)

Not to scale

A3241-DS, Rev. 10

▫ Superior temperature stability

▫ Extremely low switchpoint drift

▫ Insensitive to physical stress

VCC

Chopper-Stabilized Unipolar Hall-Effect Switches

Amp

Functional Block Diagram

Amp

Description

The A3241 and A3242 integrated circuits are unipolar Hall-

effect switches with digital outputs. These devices are suited

for operation over extended temperature ranges, up to +150°C.

Superior high-temperature performance is made possible

through an Allegro

which reduces 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 amplifier, 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 sufficient

south polarity field only, turning off in the absence of such a

south polarity field.

Continued on the next page…

Regulator

To All Subcircuits

Current Limit

Control

patented dynamic offset cancellation,

A3241 and A3242

GND

<1Ω

VOUT

Related parts for A3241EUA-T

A3241EUA-T Summary of contents

Page 1

Chopper-Stabilized Unipolar Hall-Effect Switches Features and Benefits ▪ Chopper stabilization ▫ Superior temperature stability ▫ Extremely low switchpoint drift ▫ Insensitive to physical stress ▪ Reverse battery protection ▪ Output short circuit protection ▪ Solid state reliability ▪ Small size ...

Page 2

... L temperature range. The small geometries of the BiCMOS process allow these devices to be provided in ultrasmall packages. The package styles available provide magnetically Selection Guide 1 Part Number Packing 3 A3241ELHLT-T 7-in. reel, 3000 pieces/reel A3241EUA-T 3 Bulk, 500 pieces/bag A3241LLHLT-T 3 7-in. reel, 3000 pieces/reel A3241LUA-T 3 Bulk, 500 pieces/bag A3242ELHLT-T 2 7-in ...

Page 3

A3241 and Chopper-Stabilized Unipolar Hall Effect Switches A3242 OPERATING CHARACTERISTICS valid over full operating voltage and ambient temperature ranges, unless otherwise noted Characteristic Symbol Electrical Characteristics Supply Voltage 1 V Output Leakage Current I OUTOFF Output On Voltage V OUT(SAT) ...

Page 4

A3241 and Chopper-Stabilized Unipolar Hall Effect Switches A3242 Supply Current (On) versus Ambient Temperature 5.0 4.0 3.0 2.0 1.0 0.0 - (°C) A Supply Current (Off) versus Ambient Temperature 5.0 4.0 3.0 2.0 1.0 0.0 -50 0 ...

Page 5

A3241 and Chopper-Stabilized Unipolar Hall Effect Switches A3242 Operate Point versus Ambient Temperature (A3241) 130 120 110 100 - (°C) A Release Point versus Ambient Temperature (A3241) 110 100 ...

Page 6

A3241 and Chopper-Stabilized Unipolar Hall Effect Switches A3242 Operate Point versus Ambient Temperature (A3242) 200 190 180 170 160 150 140 130 120 - (°C) A Release Point versus Ambient Temperature (A3242) 190 180 170 160 150 ...

Page 7

A3241 and Chopper-Stabilized Unipolar Hall Effect Switches A3242 THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Package Thermal Resistance Symbol Test Conditions Package LH-3, 1-layer PCB with copper limited to solder pads Package LH-3, 2-layer PCB ...

Page 8

A3241 and Chopper-Stabilized Unipolar Hall Effect Switches A3242 Operation The output of these devices switches low (turns on) when a magnetic ﬁ eld (south polarity) perpendicular to the Hall ele- ment exceeds the operate point threshold, B output voltage is ...

Page 9

A3241 and Chopper-Stabilized Unipolar Hall Effect Switches A3242 Chopper Stabilization Technique When using Hall-effect technology, a limiting factor for switchpoint accuracy is the small signal voltage developed across the Hall element. This voltage is disproportionally small relative to the offset ...

Page 10

A3241 and Chopper-Stabilized Unipolar Hall Effect Switches A3242 Power Derating The device must be operated below the maximum junction temperature of the device Under certain combinations of J(max) peak conditions, reliable operation may require derating sup- plied power ...

Page 11

A3241 and Chopper-Stabilized Unipolar Hall Effect Switches A3242 +0.12 2.98 –0.08 3 +0.10 2.90 –0. 10° REF 0.95 BSC For Reference Only; not for tooling use (reference dwg. 802840) Dimensions in millimeters Dimensions exclusive of mold flash, gate ...

Page 12

A3241 and Chopper-Stabilized Unipolar Hall Effect Switches A3242 4.09 45° +0.08 3.02 –0.05 2.16 MAX 0.51 REF 1 2 15.75 ±0.51 +0.05 0.43 –0.07 Copyright ©2005-2009, Allegro MicroSystems, Inc. The products described herein are manufactured under one or more of ...

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