3141

Data

Sheet

27621.6A

Always order by complete part number, e.g., A3141ELT .

ABSOLUTE MAXIMUM RATINGS

at T

= +25

Supply Voltage, V

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

Reverse Battery Voltage, V

RCC

........... -35 V

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

Output OFF Voltage, V

OUT

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

Reverse Output Voltage, V

OUT

........... -0.5 V

Continuous Output Current, I

OUT

...... 25 mA

Operating Temperature Range, T

Suffix ‘E–’ .................. -40

C to +85

Suffix ‘L–’ ................ -40

C to +150

Storage Temperature Range,

.............................. -65

C to +170

These Hall-effect switches are monolithic integrated circuits with

tighter magnetic specifications, designed to operate continuously over

extended temperatures to +150

°C, and are more stable with both

temperature and supply voltage changes. The unipolar switching

characteristic makes these devices ideal for use with a simple bar or rod

magnet. The four basic devices (3141, 3142, 3143, and 3144) are

identical except for magnetic switch points.

Each device includes a voltage regulator for operation with supply

voltages of 4.5 to 24 volts, reverse battery protection diode, quadratic

Hall-voltage generator, temperature compensation circuitry, small-

signal amplifier, Schmitt trigger, and an open-collector output to sink

up to 25 mA. With suitable output pull up, they can be used with

bipolar or CMOS logic circuits. The A3141– and A3142– are im-

proved replacements for the UGN/UGS3140–; the A3144– is the

improved replacement for the UGN/UGS3120–.

The first character of the part number suffix determines the device

operating temperature range. Suffix ‘E–’ is for the automotive and

industrial temperature range of -40

°C to +85°C. Suffix ‘L–’ is for the

automotive and military temperature range of -40

°C to +150°C. Three

package styles provide a magnetically optimized package for most

applications. Suffix ‘–LT’ is a miniature SOT-89/TO-243AA transis-

tor package for surface-mount applications; suffix ‘–U’ is a three-lead

plastic mini-SIP, while suffix ‘–UA’ is a three-lead ultra-mini-SIP.

FEATURES and BENEFITS

I Superior Temp. Stability for Automotive or Industrial Applications

I 4.5 V to 24 V Operation … Needs Only An Unregulated Supply

I Open-Collector 25 mA Output … Compatible with Digital Logic

I Reverse Battery Protection

I Activate with Small, Commercially Available Permanent Magnets

I Solid-State Reliability

I Small Size

I Resistant to Physical Stress

Pinning is shown viewed from branded side.

SENSITIVE HALL-EFFECT SWITCHES

FOR HIGH-TEMPERATURE OPERATION

3141

THRU

3144

Dwg. PH-003A

SUPPLY

GROUND

OUTPUT

3141

THRU

3144

SENSITIVE

HALL-EFFECT SWITCHES

FOR HIGH-TEMP. OPERATION

115 Northeast Cutoff, Box 15036

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

FUNCTIONAL BLOCK DIAGRAM

REG.

Dwg. FH-005-2

GROUND

OUTPUT

MAGNETIC CHARACTERISTICS in gauss over operating supply voltage range.

NOTES:

Typical values are at T

= +25

°C and V

= 8 V.

= operate point (output turns ON); B

= release point (output turns OFF); B

hys

= hysteresis (B

- B

*Complete part number includes a suffix to identify operating temperature range (E- or L-) and package type ( -LT, -U, or -UA).

ELECTRICAL CHARACTERISTICS at V

= 8 V over operating temperature range.

Limits

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Supply Voltage

Operating

4.5

—

Output Saturation Voltage

OUT(SAT)

OUT

= 20 mA, B > B

—

175

400

Output Leakage Current

OFF

OUT

= 24 V, B < B

—

<1.010

µA

Supply Current

B < B

(Output OFF)

—

4.4

9.0mA

Output Rise Time

= 820

Ω, C

= 20 pF

—

0.04

2.0

µs

Output Fall Time

= 820

Ω, C

= 20 pF

—

0.18

2.0

µs

Part Numbers*

A3141–

A3142–

A3143–

A3144–

Characteristic

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

at T

= 25

°C

5010

0160 130180230 220280340

70 —

350

over operating temp. range

3010

0175

115

180245

280355

—

450

at T

= 25

°C

1045

130

125

175

165

225

285

50—

330

over operating temp. range

1045

145

125

190 150

225

0 25

—

430

hys

at T

= 25

°C

2055

3055

80 3055

80 2055

—

over operating temp. range

2055

3055

80 3055

80 2055

—

3141

THRU

3144

SENSITIVE

HALL-EFFECT SWITCHES

FOR HIGH-TEMP. OPERATION

SUPPLY CURRENT

SUPPLY VOLTAGE IN VOLTS

Dwg. GH-041-1

SUPPLY CURRENT IN mA

2.0

4.0

6.0

8.0

≥ B

≤ B

T = +25

°C

100

AMBIENT TEMPERATURE IN

°C

-50

Dwg. GH-039-1

125

-25

V = 8 V

SUPPLY CURRENT IN mA

7.0

6.0

5.0

4.0

150

≤ B

≥ B

TYPICAL OPERATING CHARACTERISTICS

A3142– SWITCH POINTS

OUTPUT SATURATION VOLTAGE

100

300

AMBIENT TEMPERATURE IN

°C

200

100

-50

Dwg. GH-040-1

SATURATION VOLTAGE IN mV

150

-25

125

I = 20 mA

V = 4.5–24 V

OUT

100

AMBIENT TEMPERATURE IN

°C

-50

Dwg. GH-044

SWITCH POINT IN GAUSS

300

400

200

100

OPERATE POINT

RELEASE POINT

V = 8 V

150

-25

125

* Complete part number includes a suffix denoting operating temperature range (E- or L-) and package type ( -LT, -U, or -UA).

3141

THRU

3144

SENSITIVE

HALL-EFFECT SWITCHES

FOR HIGH-TEMP. OPERATION

115 Northeast Cutoff, Box 15036

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

TYPICAL OPERATING CHARACTERISTICS (cont.)

CHANGE IN OPERATE POINT

SUPPLY VOLTAGE IN VOLTS

Dwg. GH-042-1

CHANGE IN OPERATE POINT IN GAUSS

-5.0

5.0

T = +25

°C

OPERATION

The output of these devices (pin 3) switches low when the magnetic field

at the Hall sensor exceeds the operate point threshold (B

). At this point, the

output voltage is V

OUT(SAT)

. When the magnetic field is reduced to below the

release point threshold (B

), the device output goes high. The difference in

the magnetic operate and release points is called the hysteresis (B

hys

) of the

device. This built-in hysteresis allows clean switching of the output even in

the presence of external mechanical vibration and electrical noise.

SENSOR LOCATIONS

(

0.005” [0.13 mm] die placement)

Dwg. MH-011-10

0.019"

0.48 mm

NOM

BRANDED

SURFACE

ACTIVE AREA DEPTH

0.082"

2.07 mm

0.055"

1.39 mm

Suffix “UA”

Suffix “LT”

0.043"

1.09 mm

Dwg. MH-008-2C

0.030"

0.76 mm

NOM

ACTIVE AREA DEPTH

0.089"

2.26 mm

Suffix “U”

Dwg. MH-002-2B

0.016"

0.41 mm

NOM

BRANDED

SURFACE

ACTIVE AREA DEPTH

0.070"

1.78 mm

0.091"

2.31 mm

3141

THRU

3144

SENSITIVE

HALL-EFFECT SWITCHES

FOR HIGH-TEMP. OPERATION

PACKAGE DESIGNATOR ‘LT’

(SOT-89/TO-243AA)

Dimensions in Inches

(for reference only)

Dimensions in Millimeters

(controlling dimensions)

Dwg. MA-009-3 in

0.064

0.072

0.155

0.167

0.059

BSC

0.014

0.019

0.035

0.047

0.090

0.102

0.055

0.063

0.014

0.017

0.084

0.090

0.017

0.022

0.118

BSC

0.173

0.181

Dwg. MA-009-3 mm

4.40

4.60

1.62

1.83

3.94

4.25

1.50

BSC

0.36

0.48

0.89

1.20

2.29

2.60

1.40

1.60

0.35

0.44

2.13

2.29

0.44

0.56

3.00

BSC

NOTES: 1.

Tolerances on package height and width represent allowable mold offsets. Dimensions given are

measured at the widest point (parting line).

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

Height does not include mold gate flash.

3141

THRU

3144

SENSITIVE

HALL-EFFECT SWITCHES

FOR HIGH-TEMP. OPERATION

115 Northeast Cutoff, Box 15036

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

Dwg. MH-003D in

0.063

0.059

0.018

0.015

0.016

0.050

0.100

SEE NOTE

0.183

0.178

0.181

0.176

0.600

0.560

0.086

MAX

Dwg. MH-003D mm

1.60

1.50

0.46

0.38

0.41

1.27

2.54

SEE NOTE

4.65

4.52

4.60

4.47

15.24

14.23

2.18

MAX

NOTES: 1.

Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured

at the widest point (parting line).

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

Height does not include mold gate flash.

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

PACKAGE DESIGNATOR ‘U’

Dimensions in Inches

Dimensions in Millimeters

(controlling dimensions)

(for reference only)

Devices in the ‘U’ package are

NOT RECOMMENDED FOR NEW DESIGN

3141

THRU

3144

SENSITIVE

HALL-EFFECT SWITCHES

FOR HIGH-TEMP. OPERATION

Dwg. MH-014D in

0.164

0.159

0.062

0.058

0.015

0.050

BSC

0.640

0.600

0.016

0.085

MAX

0.031

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).

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

Height does not include mold gate flash.

Dwg. MH-014D mm

4.17

4.04

1.57

1.47

0.38

1.27

BSC

16.26

15.24

0.41

2.16

MAX

0.79

3.10

2.97

SEE NOTE

PACKAGE DESIGNATOR ‘UA’

Dimensions in Inches

Dimensions in Millimeters

(controlling dimensions)

(for reference only)

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 design of its products.

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 which

may result from its use.

3141

THRU

3144

SENSITIVE

HALL-EFFECT SWITCHES

FOR HIGH-TEMP. OPERATION

115 Northeast Cutoff, Box 15036

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

HALL-EFFECT SENSORS SELECTION GUIDE

Partial Part

Avail. Oper.

Characteristics at TA = +25

Number

Temp.

BOP(max)

BRP(min)

Bhys(typ)

Features

Notes

HALL-EFFECT UNIPOLAR SWITCHES in order of BOP and Bhys

3240E/L

+50+5.010chopper stabilized

3210E

±70

±5.07.7

micropower, chopper stabilized

3361

+120+50 5.0

2-wire, chopper stabilized

3362

+120+50 5.0

2-wire, chopper stabilized

3161

+160+30 20 2-wire

3141

E/L

+160+10 55

3235

+175

+25

15*

output 1

-25

-175

15*

output 2

5140

+200

+50

300 mA output

1, 3

3142

E/L

+230+75

3143

E/L

+340+165

3144

E/L

+350+50 55

3122

E/L

+400

+140

105

3123

E/L

+440+180 10

3121

E/L

+450+125

3150J

+40

to +850

–

20programmable, chopper stabilized

HALL-EFFECT LATCHES & BIPOLAR SWITCHES

†

in order of BOP and Bhys

3260E/L

+30-30 20bipolar, chopper stabilized

3280E/L

+40-40 45

chopper stabilized

3134

E/L

+50-50 27

bipolar switch

3133

K/L/S

+75

-75

bipolar switch

3281

E/L

+90-9010

0chopper stabilized

3132

K/L/S

+95

-95

bipolar switch

3187

E/L

+150

-150

100*

3177

+150-150 20

3625

+150

-150

200

900 mA outputs

1, 3, 5

3626

+150

-150

200

400 mA outputs

1, 3, 5

3195

E/L

+160-160 220

1, 4

3197

+160-160 230

3175

+170-170 20

3188

E/L

+180

-180

200*

3283

E/L

+180-180 30

0 chopper stabilized

3189

E/L

+230

-230

100*

3275

+250

-250

100*

3185

E/L

+270-270340

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.

3. Power driver output.

4. Active pull down.

5. Complementary outputs for 2-phase bifilar-wound, unipolar-driven brushless dc motor control.

* Minimum.

† 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.