A3144EU - Allegro MicroSystems, Inc.

Data Sheet

27621.6A

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

ABSOLUTE MAXIMUM RATINGS

at T

A = +25°C

Supply Voltage, VCC ............................ 28 V

Reverse Battery Voltage, VRCC ........... -35 V

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

Output OFF Voltage, VOUT .................. 28 V

Reverse Output Voltage, VOUT ........... -0.5 V

Continuous Output Current, IOUT ...... 25 mA

Operating Temperature Range, TA

Suffix ‘E–’ .................. -40°C to +85°C

Suffix ‘L–’ ................ -40°C to +150°C

Storage Temperature Range,

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

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

■ Superior Temp. Stability for Automotive or Industrial Applications

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

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

■ Reverse Battery Protection

■ Activate with Small, Commercially Available Permanent Magnets

■ Solid-State Reliability

■ Small Size

■ 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

VCC

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 TA = +25°C and VCC = 8 V.

BOP = operate point (output turns ON); BRP = release point (output turns OFF); Bhys = hysteresis (BOP - BRP).

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

ELECTRICAL CHARACTERISTICS at VCC = 8 V over operating temperature range.

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Supply Voltage VCC Operating 4.5 — 24 V

Output Saturation Voltage VOUT(SAT) IOUT = 20 mA, B > BOP — 175 400 mV

Output Leakage Current IOFF VOUT = 24 V, B < BRP — <1.0 10 µA

Supply Current ICC B < BRP (Output OFF) — 4.4 9.0 mA

Output Rise Time trRL = 820 Ω, CL = 20 pF — 0.04 2.0 µs

Output Fall Time tfRL = 820 Ω, CL = 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.

BOP at TA = 25°C 50 100 160 130 180 230 220 280 340 70 — 350

over operating temp. range 30 100 175 115 180 245 205 280 355 35 — 450

BRP at TA = 25°C 10 45 130 75 125 175 165 225 285 50 — 330

over operating temp. range 10 45 145 60 125 190 150 225 300 25 — 430

Bhys at TA = 25°C 20 55 80 30 55 80 30 55 80 20 55 —

over operating temp. range 20 55 80 30 55 80 30 55 80 20 55 —

3141

THRU

3144

SENSITIVE

HALL-EFFECT SWITCHES

FOR HIGH-TEMP. OPERATION

SUPPLY CURRENT SUPPLY CURRENT

10 15 20 25

SUPPLY VOLTAGE IN VOLTS

. GH-041-1

SUPPLY CURRENT IN mA

2.0

4.0

6.0

8.0

B ≥ B

B ≤ B

T = +25°C

025 50 75 100

AMBIENT TEMPERATURE IN °C

-50

. GH-039-1

125

-25

V = 8

SUPPLY CURRENT IN mA

7.0

6.0

5.0

4.0

150

B ≤ B

B ≥ B

TYPICAL OPERATING CHARACTERISTICS

A3142– SWITCH POINTS OUTPUT SATURATION VOLTAGE

025 50 75 100

300

AMBIENT TEMPERATURE IN °C

200

100

-50

. GH-040-1

SATURATION VOLTAGE IN mV

150

-25 125

I = 20 mA

V = 4.5–24 V

OUT

050 100

AMBIENT TEMPERATURE IN °C

-50

. GH-044

SWITCH POINT IN GAUSS

300

400

200

100

OPERATE POINT

RELEASE POINT

V = 8 V

150

-25 25 75 125

* 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

10 15 20 25

SUPPLY VOLTAGE IN VOLTS

. 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 (BOP). At this point, the

output voltage is VOUT(SAT). When the magnetic field is reduced to below the

release point threshold (BRP), the device output goes high. The difference in

the magnetic operate and release points is called the hysteresis (Bhys) 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)

132

. 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

1 32

. MH-008-2C

0.030"

0.76 mm

NOM

ACTIVE AREA DEPTH

0.089"

2.26 mm

Suffix “U”

132

. 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

123

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

123

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).

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

3. 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

1 2 3

0.100

45°

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

1 2 3

2.54

45°

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).

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).

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

45°

0.640

0.600

0.016

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.

Dwg. MH-014D mm

4.17

4.04

1.57

1.47

0.38

1.27

BSC

45°

16.26

15.24

0.41

2.16

MAX

45°

0.79

123

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°C

Number Temp. BOP(max) BRP(min) Bhys(typ) Features Notes

HALL-EFFECT UNIPOLAR SWITCHES in order of BOP and Bhys

3240 E/L +50 +5.0 10 chopper stabilized 1

3210 E ±70 ±5.0 7.7 micropower, chopper stabilized

3361 E +120 +50 5.0* 2-wire, chopper stabilized

3362 E +120 +50 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 output 1, 3

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

3150 J +40 to +850 – 20

programmable, chopper stabilized

HALL-EFFECT LATCHES & BIPOLAR SWITCHES† in order of BOP and Bhys

3260 E/L +30 -30 20 bipolar, 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 +150 -150 100*

3177 S +150 -150 200

3625 S +150 -150 200 900 mA outputs 1, 3, 5

3626 S +150 -150 200 400 mA outputs 1, 3, 5

3195 E/L +160 -160 220 1, 4

3197 L +160 -160 230 1

3175 S +170 -170 200

3188 E/L +180 -180 200*

3283 E/L +180 -180 300 chopper stabilized

3189 E/L +230 -230 100*

3275 S +250 -250 100* 5

3185 E/L +270 -270 340*

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.