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

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

3361

AND

3362

2-WIRE,

CHOPPER-STABILIZED,

HALL-EFFECT SWITCHES

www.allegromicro.com

5

SENSOR LOCATIONS

(±0.005” [0.13 mm] die placement)

Package Designator “LH”

Package Designators “UA” and "UA-TL"

Although sensor location is accurate to three sigma for a
particular design, product improvements may result in small
changes to sensor location.

0.038"

0.96 mm

1 2

Dwg. MH-025

0.011"

0.28 mm
NOM

ACTIVE AREA DEPTH

0.059"

1.49 mm

A

3

0.045"

1.14 mm

1 32

Dwg. MH-008-8

0.030"

0.76 mm
NOM

ACTIVE AREA DEPTH

0.088"

2.24 mm

A

1 32

Dwg. MH-011-9A

0.018"

0.46 mm
NOM

BRANDED
SURFACE

ACTIVE AREA DEPTH

0.080"

2.04 mm

0.056"

1.44 mm

A

Package Designator “LT”

600

400

200

20 60 100 140

0

AMBIENT TEMPERATURE in °C

ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS

Dwg. GH-046-4

Suffix "–UA"
R

θJA

= 206°C/W

40 80 120 180

700

500

300

100

160

Suffix "–LT"
R

θJA

= 258°C/W

Suffix "–LH"
R

θJA

= 248°C/W

Allegro

3361

AND

3362

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

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

6

All Allegro sensors are subjected to stringent qualification requirements prior to being released to production.

To become qualified, except for the destructive ESD tests, no failures are permitted.

CRITERIA FOR DEVICE QUALIFICATION

Qualification Test Test Method and Test Conditions Test Length Samples Comments

Biased Humidity (HAST) TA = 130°C, RH = 85% 50 hrs 77 VCC = V

OUT

= 5 V

High-Temperature JESD22-A108, 408 hrs 77 VCC = 24 V,
Operating Life (HTOL) TA = 150°C, TJ = 165°CV

OUT

= 20 V

Accelerated HTOL JESD22-A108, 504 hrs 77 VCC = 24 V,

TA = 175°C, TJ = 190°CV

OUT

= 20 V

Autoclave, Unbiased JESD22-A102, Condition C, 96 hrs 77

TA = 121°C, 15 psig

High-Temperature MIL-STD-883, Method 1008, 1000 hrs 77
(Bake) Storage Life TA = 170°C

Temperature Cycle MIL-STD-883, Method 1010, 500 cycles 77

-65°C to +150°C

Latch-Up — Pre/Post 6

Reading

Electro-Thermally — Pre/Post 6
Induced Gate Leakage Reading

ESD, CDF-AEC-Q100-002 Pre/Post x per Test to failure,
Human Body Model Reading test All leads > TBD

Electrical Distributions Per Specification — 30

3361

AND

3362

2-WIRE,

CHOPPER-STABILIZED,

HALL-EFFECT SWITCHES

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7

FUNCTIONAL DESCRIPTION

Dwg. EH-012

REG

SAMPLE

& HOLD

X

+V

HALL
VOLTAGE

B

+

—

Dwg. AH-011-2

100 Ω

Dwg. EH-011-2A

0.1 µF

SUPPLY

X

1

3

2

'UA' PACKAGE

0.95 V

–

+

Chopper-Stabilized Technique. The Hall element can be
considered as a resistor array similar to a Wheatstone bridge. A
large portion of the offset is a result of the mismatching of these
resistors. These devices use a proprietary dynamic offset
cancellation technique, with an internal high-frequency clock to
reduce the residual offset voltage of the Hall element that is
normally caused by device overmolding, temperature dependen­cies, and thermal stress. The chopper-stabilizing technique
cancels the mismatching of the resistor circuit by changing the
direction of the current flowing through the Hall plate using
CMOS switches and Hall voltage measurement taps, while
maintaing the Hall-voltage signal that is induced by the external
magnetic flux. The signal is then captured by a sample-and­hold circuit and further processed using low-offset bipolar
circuitry. This technique produces devices that have an
extremely stable quiescent Hall output voltage, are immune to
thermal stress, and have precise recoverability after temperature
cycling. This technique will also slightly degrade the device
output repeatability. A relatively high sampling frequency is
used in order that faster signals can be processed.

More detailed descriptions of the circuit operation can be

found in: Technical Paper STP 97-10, Monolithic Magnetic

Hall Sensor Using Dynamic Quadrature Offset Cancellation
and Technical Paper STP 99-1, Chopper-Stabilized Amplifiers
With A Track-and-Hold Signal Demodulator.

Operation. As shown in the output characteristic graphs, the
output of the A3362 turns on when a magnetic field (south pole)
perpendicular to the Hall sensor is increased above the operate
point threshold (BOP). After turn on, the output will source
current equal to the device operating current plus a current
source (I

GND(H)

). When the magnetic field is decreased below
the release point (BRP), the output turns off and will source
current equal only to the Hall-effect sensor operating current
(I

GND(L)

). The A3361 output is inverted and the device turns off
at BOP and on at BRP. The difference in the magnetic operate
and release points is the hysteresis (B

hys

) of the device. The
hysteresis allows clean switching of the output even in the
presence of external mechanical vibration or electrical noise.

Applications. It is strongly recommended that an external
bypass capacitor be connected (in close proximity to the Hall
sensor) between the supply and ground of the device to reduce
both external noise and noise generated by the chopper­stabilization technique.

Extensive applications information on magnets and Hall­effect sensors is also available in the Allegro Electronic Data
Book AMS-702 or Application Note 27701 or

www.allegromicro.com

3361

AND

3362

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

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

8

PACKAGE DESIGNATOR 'LH'

(fits SC-74A solder-pad layout)

NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point (parting line).

2. Exact body and lead configuration at vendor’s option within limits shown.

3. Height does not include mold gate flash.

4. Where no tolerance is specified, dimension is nominal.

Dwg. MA-011-3 mm

12

1.00

2.40

0.95

0.70

3

Dwg. MA-010-3B in

12

0.006

0.000

0.0079

0.0050

0.122

0.114

0.083

0.073

0.118

0.106

0.037

BSC

0.022

REF

0.020

0.012

3

0° TO 8°

0.020

MIN

0.043

0.035

0.049

0.035

Dwg. MA-011-3 in

12

0.039

0.094

0.03

7

0.028

3

Dimensions in Inches

(for reference only)

Dimensions in Millimeters

(controlling dimensions)

Dwg. MA-010-3B mm

12

0.15

0.00

0.20

0.127

3.10

2.90

2.10

1.85

3.00

2.70

0.95

BSC

0.55

REF

0.50

0.30

3

0° TO 8°

0.25

MIN

1.10

0.90

1.25

0.90

3361

AND

3362

2-WIRE,

CHOPPER-STABILIZED,

HALL-EFFECT SWITCHES

www.allegromicro.com

9

Dwg. MA-009-3A in

1

23

0.072

0.064

0.167

0.155

0.059

BSC

0.0189

0.0142

0.047

0.035

0.102

0.090

0.063

0.055

0.0173

0.0138

0.090

0.084

0.0221

0.0173

0.118

BSC

0.181

0.173

Dwg. MA-009-3A mm

1

23

4.60

4.40

1.83

1.62

4.25

3.94

1.50

BSC

0.48

0.36

1.20

0.89

2.60

2.29

1.60

1.40

0.44

0.35

2.29

2.13

0.56

0.44

3.00

BSC

PACKAGE DESIGNATOR 'LT'

(SOT-89/TO-243AA)

Dimensions in Inches

(for reference only)

Dimensions in Millimeters

(controlling dimensions)

13

B

2.5

0.8

2.6

1.2

4.6

2.0

Dwg. MA-012-3 mm

Pads 1, 2, 3, and A — Standard SOT-89 Layout
Pads 1, 2, 3, and B — Low-Stress Version
Pads 1, 2, and 3 only — Lowest Stress, But Not Self Aligning

2

0.7

TYP

0.8

TYP

A

NOTE: Exact body and lead configuration at vendor’s option within limits shown.

1

B

0.098

0.031

0.102

0.047

0.181

0.079

Dwg. MA-012-3 in

a

ds 1, 2, 3, and A — Standard SOT-89 Layout

a

ds 1, 2, 3, and B — Low-Stress Version

a

ds 1, 2, and 3 only — Lowest Stress, But Not Self Aligning

2

0.028

TYP

0.031

TYP

A

3

3361

AND

3362

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

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

10

Surface-Mount Lead Form (order A336xEUA-TL)

Dimensions in Inches

(controlling dimensions)

Dimensions in Millimeters

(for reference only)

PACKAGE DESIGNATOR 'UA'

0.095

±0.005

0.020

MIN

FLAT

Dwg. MH-015 in

0.004

MAX

0.002

MAX

0°–8°

2.41

±0.13

0.51

MIN

FLAT

Dwg. MH-015 mm

0.10

MAX

0.051

MAX

0°–8°

Dwg. MH-014E mm

4.17

4.04

1.57

1.47

0.44

0.35

1.27

BSC

45°

16.26

15.24

0.48

0.36

2.16

MAX

45°

0.79

123

3.10

2.97

SEE NOTE

Dwg. MH-014E in

0.164

0.159

0.062

0.058

0.0173

0.0138

0.050

BSC

45°

0.640

0.600

0.0189

0.0142

0.085

MAX

45°

0.031

123

0.122

0.117

SEE NOTE

NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point (parting line).

2. Exact body and lead configuration at vendor’s option within limits shown.

3. Height does not include mold gate flash.

4. Recommended minimum PWB hole diameter to clear transition area is 0.035” (0.89 mm).

5. Where no tolerance is specified, dimension is nominal.

3361

AND

3362

2-WIRE,

CHOPPER-STABILIZED,

HALL-EFFECT SWITCHES

www.allegromicro.com

11

The products described herein are manufactured under one or
more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283;
5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719;
5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents
pending.

Allegro MicroSystems, Inc. reserves the right to make, from time to
time, such departures from the detail specifications as may be
required to permit improvements in the performance, reliability, or
manufacturability of its products. Before placing an order, the user is
cautioned to verify that the information being relied upon is current.

Allegro products are not authorized for use as critical components
in life-support appliances, devices, or systems without express written
approval.

The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsi­bility for its use; nor for any infringements of patents or other rights
of third parties that may result from its use.

3361

AND

3362

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

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

12

HALL-EFFECT SENSORS

Partial Part Avail. Oper. Characteristics at TA = +25°C
Number Temp. B

OP

max B

RP

min B

hys

typ Features Notes

HALL-EFFECT UNIPOLAR & OMNIPOLAR SWITCHES in order of B

OP

and B

hys

3240 E/L +50 +5.0 10 chopper stabilized 1
3209 E ±60 ±5.0 7.7 400 µW, chopper stabilized
3210 E ±60 ±5.0 7.7 25 µW, chopper stabilized
3361 E +110 +55 5.0* 2-wire, chopper stabilized, inverted output
3362 E +110 +55 5.0* 2-wire, chopper stabilized
3161 E +160 +30 20 2-wire
3141 E/L +160 +10 55
3235 S +175 +25 15* output 1 2

-25 -175 15* output 2 2
5140 E +200 +50 55 300 mA power driver output 1
3142 E/L +230 +75 55
3143 E/L +340 +165 55
3144 E/L +350 +50 55
3122 E/L +400 +140 105
3123 E/L +440 +180 105
3121 E/L +450 +125 105

HALL-EFFECT LATCHES & BIPOLAR SWITCHES† in order of B

OP

and B

hys

3260 E/L +30 -30 20 bipolar switch, chopper stabilized
3280 E/L +40 -40 45 chopper stabilized
3134 E/L +50 -50 27 bipolar switch
3133 K/L/S +75 -75 52 bipolar switch
3281 E/L +90 -90 100 chopper stabilized
3132 K/L/S +95 -95 52 bipolar switch
3187 E/L [phone]*
3177 S [phone]
3625 S [phone] mA power driver output 1, 3
3626 S [phone] mA power driver output 1, 3
3195 E/L [phone] active pulldown 1
3197 L [phone]
3175 S [phone]
3188 E/L [phone]*
3283 E/L [phone] chopper stabilized
3189 E/L [phone]*
3275 S [phone]* 3
3185 E/L [phone]*

Operating Temperature Ranges:

S = -20°C to +85°C, E = -40°C to +85°C, J = -40°C to +115°C, K = -40°C to +125°C, L = -40°C to +150°C

Notes 1. Protected.

2. Output 1 switches on south pole, output 2 switches on north pole for 2-phase, bifilar-wound, unipolar-driven brushless dc
motor control. Outputs may be tied together for omnipolar operation.

3. Complementary outputs for 2-phase bifilar-wound, unipolar-driven brushless dc motor control.
* Minimum. ‡ Maximum
† Latches will not switch on removal of magnetic field; bipolar switches may switch on removal of field but require field reversal

for reliable operation over operating temperature range.