Allegro A3362EUA, A3362ELT, A3362ELH, A3362EEUA-TL, A3361EUA Datasheet

The A3361x and A3362x Hall-effect switches are extremely
temperature-stable and stress-resistant sensors. Superior performance
over temperature is made possible through dynamic offset cancellation,
which reduces the residual offset voltage normally caused by device
overmolding, temperature dependencies, and thermal stress. The two
devices differ only in output polarity; the A3361x output current goes
low in the presence of a south pole of sufficient strength; the A3362x
output current goes high.

Each device includes on a single silicon chip a voltage regulator,
Hall-voltage generator, small-signal amplifier, chopper stabilization,
Schmitt trigger, and a constant-current open-collector output. An
on-board regulator permits operation with supply voltages of 3.5 to 24
volts. Noise radiation is limited by control of the output current slew
rate.

Three package styles provide a magnetically optimized package for
most applications. Suffix ‘xLH’ is a miniature low-profile surface­mount package, ‘xLT’ is a miniature SOT-89/TO-243AA transistor
package for surface-mount applications; while suffix ‘xUA’ is a three­lead ultra-mini-SIP for through-hole mounting.

FEATURES

■ Internal Current Regulator for 2-Wire Operation

■ Resistant to Physical Stress

■ Superior Temperature Stability

■ Operation From Unregulated Supply

■ Solid-State Reliability

■ Small Size

Always order by complete part number: the prefix 'A' + the basic four-digit
part number + a suffix to indicate operating temperature range (E) +
a two-letter suffix to indicate package style, e.g., A3361ELH .

2-WIRE, CHOPPER-STABILIZED,

HALL-EFFECT SWITCHES

Suffix Code 'LH' Pinning

ABSOLUTE MAXIMUM RATINGS

at TA=+25°C

NC

X

SUPPLY

GROUND

12

3

Dwg. PH-003-5

NO (INTERNAL)

CONNECTION

Pinning is shown viewed from branded side.

3361

AND

3362

Supply Voltage, VCC........................ 26.5 V

Reverse Battery Voltage, V

RCC

.......... -16 V

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

Package Power Dissipation, PD. See Graph

Junction Temperature, TJ............... +170°C

Operating Temperature Range,

TA............................... -40°C to +85°C

Storage Temperature Range,

TS.............................. -65°C to +170°C

PRELIMINARY INFORMATION

(subject to change without notice)

August 28, 2000

Data Sheet

27621.50

3361

AND

3362

2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

2

FUNCTIONAL BLOCK DIAGRAM

Copyright © 2000, Allegro MicroSystems, Inc.

Dwg. FH-020-6

X

DYNAMIC

OFFSET CANCELLATION

SUPPLY

REG.

SAMPLE

& HOLD

LOW-PASS

FILTER

TO ALL

SUBCIRCUITS

GROUND

Pinning is shown viewed from branded side.

X

Dwg. PH-003-6

1

SUPPLY

GROUND

32

NO (INTERNAL)

CONNECTION

NC

X

Dwg. PH-003-7A

1

SUPPLY

GROUND

32

GROUND

Suffix Code 'UA' Pinning

(SIP)

Suffix Code 'LT' Pinning

(SOT-89/TO-243AA)

3361

AND

3362

2-WIRE,

CHOPPER-STABILIZED,

HALL-EFFECT SWITCHES

www.allegromicro.com

3

A3361 MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Operate Point B

OP

B > BOP, I

GND

= LOW – – 125 G

Release Point B

RP

B < BRP, I

GND

= HIGH 40 – – G

Hysteresis B

hys

BOP - B

RP

5.0 – 30 G

A3362 MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Operate Point B

OP

B > BOP, I

GND

= HIGH – – 125 G

Release Point B

RP

B < BRP, I

GND

= LOW 40 – – G

Hysteresis B

hys

BOP - B

RP

5.0 – 30 G

ELECTRICAL CHARACTERISTICS over operating temperature range.

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Supply Voltage V

CC

Operating 3.5 12 24 V

Output Current I

GND(L)

Output Current Low 5.0 – 6.9 mA

I

GND(H)

Output Current High 12 – 17 mA

Chopping Frequency f

C

– 340 – kHz

Output Settling Time t

sd

CL = 20 pF – – 50 µs

Output Rise Time t

r

CL = 20 pF – 3.5 – µs

Output Fall Time t

f

CL = 20 pF – 3.5 – µs

Reverse Battery Current I

CC

V

RCC

= -16 V – – -15 mA

NOTE: Typical Data is at TA = +25°C and VCC = 12 V and is for design information only.

3361

AND

3362

2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

4

+B

0

OUTPUT CURRENT

FLUX DENSITY

Dwg. GH-007-3

0

RP

B

I

CC

I

OUT

+ I

CC

OP

B

+I

OUTPUT CHARACTERISTICS

A3361x A3362x

+B

0

OUTPUT CURRENT

FLUX DENSITY

Dwg. GH-007-4

0

RP

B

OP

B

I

OUT

+ I

CC

I

CC

+I