Datasheet UGN3503UA, UGN3503LT, UGN3503U Datasheet (Allegro)

X

Data Sheet

27501B*

3503

RATIOMETRIC, LINEAR

HALL-EFFECT SENSORS

The UGN3503LT, UGN3503U, and UGN3503UA Hall-effect
sensors accurately track extremely small changes in magnetic flux
density—changes generally too small to operate Hall-effect switches.

As motion detectors, gear tooth sensors, and proximity detectors,
they are magnetically driven mirrors of mechanical events. As sensitive
monitors of electromagnets, they can effectively measure a system's
performance with negligible system loading while providing isolation
from contaminated and electrically noisy environments.

V

CC

1

SUPPLY

Pinning is shown viewed from branded side.

GROUND

32

OUTPUT

Dwg. PH-006

Each Hall-effect integrated circuit includes a Hall sensing element,
linear amplifier, and emitter-follower output stage. Problems associated
with handling tiny analog signals are minimized by having the Hall cell
and amplifier on a single chip.

Three package styles provide a magnetically optimized package for
most applications. Package suffix ‘LT’ is a miniature SOT-89/TO­243AA transistor package for surface-mount applications; suffix ‘U’ is a
miniature three-lead plastic SIP, while ‘UA’ is a three-lead ultra-mini­SIP. All devices are rated for continuous operation over the temperature
range of -20°C to +85°C.

FEATURES

■ Extremely Sensitive

■ Flat Response to 23 kHz

■ Low-Noise Output

■ 4.5 V to 6 V Operation

■ Magnetically Optimized Package

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, VCC............................. 8 V

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

Operating Temperature Range,

T

............................ -20°C to +85°C

A

Storage Temperature Range,

T

........................... -65°C to +150°C

S

Always order by complete part number, e.g., UGN3503UA .

3503

RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS

FUNCTIONAL BLOCK DIAGRAM

1

X

V

CC

REG.

OUTPUT

3

2

GROUND

Dwg. FH-007

ELECTRICAL CHARACTERISTICS at T

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Operating Voltage V

Supply Current I

Quiescent Output Voltage V

Sensitivity ∆V

Bandwidth (-3 dB) BW — 23 — kHz

Broadband Output Noise V

Output Resistance R

All output-voltage measurements are made with a voltmeter having an input impedance of at least 10 kΩ.

Magnetic flux density is measured at most sensitive area of device located 0.016" (0.41 mm) below the branded face of the ‘U’
package; 0.020" (0.51 mm) below the branded face of the ‘UA’ package; and 0.030" (0.76 mm) below the branded face of the ‘LT’
package.

CC

CC

OUT

OUT

out

OUT

= +25°C, V

A

B = 0 G 2.25 2.50 2.75 V

B = 0 G to ±900 G 0.75 1.30 1.75 mV/G

BW = 10 Hz to 10 kHz — 90 — µV

CC

= 5 V

Limits

4.5 — 6.0 V

—9.013mA

— 50 220 Ω

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

Copyright © 1985, 1999, Allegro MicroSystems, Inc.

3503

VCC = +5V

T

A

= +25°C

10

8.0

6.0

4.0

2.0

0

10

100

1K 10K

FREQUENCY IN H

Z

OUTPUT NOISE IN µ Vrms √H

Z

RATIOMETRIC,

LINEAR

HALL-EFFECT SENSORS

OUTPUT VOLTAGE AS A

FUNCTION OF TEMPERATURE

4.0

V

5V

=

3.5

0

5

+

=

B

3.0

2.5

OUTPUT IN VOLTS

2.0

1.5
40 20 0 +25 +85 +125

AMBIENT TEMPERATURE IN C

B = 0G

B

=

CC

G

0

-50

0G

Dwg. A-12,573 Dwg. A-12,505

SUPPLY CURRENT AS A

FUNCTION OF SUPPLY VOLTAGE

12

11

10

B = 0G

T

= +25°C

A

OUTPUT NOISE AS A

FUNCTION OF FREQUENCY

DEVICE SENSITIVITY AS A

FUNCTION OF SUPPLY VOLTAGE

2.5

2.0

1.5

TA = +25°C

9.0

SUPPLY CURRENT IN mA

8.0

7.0

4.5 5.0 5.5 6.0

SUPPLY VOLTAGE IN VOLTS

Dwg. A-12,506

OUTPUT NULL VOLTAGE AS A

FUNCTION OF SUPPLY VOLTAGE

5.0

B = 0G

T

4.0

3.0

2.0

1.0

OUTPUT NULL VOLTAGE IN VOLTS

0

4.5 5.0 5.5 6.0
SUPPLY VOLTAGE IN VOLTS

= +25°C

A

1.0

TYPICAL SENSITIVITY IN V/G

0.5

0

4.5 5.0 5.5 6.0
SUPPLY VOLTAGE IN VOLTS

Dwg. A-12,507

LINEARITY AND SYMMETRY AS A
FUNCTION OF SUPPLY VOLTAGE

100

OUTPUT SYMMETRY

99

LINEARITY BELOW NULL

B = -900G

98

ITY ABO

EAR

LIN

B = +900G

97

96

LINEARITY AND SYMMETRY IN PERCENT

95

4.5 5.0 5.5 6.0

LL

U

VE N

SUPPLY VOLTAGE IN VOLTS

TA = +25°C

Dwg.A-12,509Dwg. A-12,508

3503

RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS

NOTCH SENSOR

Dwg. A-12,574

GEAR TOOTH SENSOR

OPERATION

The output null voltage (B = 0 G) is nominally one-half the supply
voltage. A south magnetic pole, presented to the branded face of the Hall­effect sensor will drive the output higher than the null voltage level. A north
magnetic pole will drive the output below the null level.

In operation, instantaneous and proportional output-voltage levels are
dependent on magnetic flux density at the most sensitive area of the device.
Greatest sensitivity is obtained with a supply voltage of 6 V, but at the cost of
increased supply current and a slight loss of output symmetry. The sensor's
output is usually capacitively coupled to an amplifier that boosts the output
above the millivolt level.

In two applications shown, a permanent bias magnet is attached with
epoxy glue to the back of the epoxy package. The presence of ferrous material
at the face of the package acts as a flux concentrator.

The south pole of a magnet is attached to the back of the package if the
Hall-effect IC is to sense the presence of ferrous material. The north pole of a
magnet is attached to the back surface if the integrated circuit is to sense the
absence of ferrous matrial.

N

3

2

1

CURRENT MONITOR

Dwg. A-12,512

Calibrated linear Hall devices, which can be used to determine the actual
flux density presented to the sensor in a particular application, are available.

SENSOR LOCATIONS

SUFFIX “U”

SUFFIX “LT” SUFFIX “UA”

ACTIVE AREA DEPTH

0.030"

0.76 mm
NOM

ACTIVE AREA DEPTH

0.091"

2.32 mm

0.015"

0.38 mm

NOM

BRANDED
SURFACE

0.042"

1.08 mm

A

1 3

2

ACTIVE AREA DEPTH

0.093"

2.37 mm

0.072"

1.83 mm

Dwg. MH-002-5C

0.018"

0.46 mm
NOM

0.084"

2.13 mm

0.056"

1.43 mm

Dwg. A-12,513

A

1 32

Dwg. MH-008-9

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

BRANDED
SURFACE

A

1 3

2

Dwg. MH-011-3C

Dimensions in Inches

(for reference only)

3503

RATIOMETRIC,

LINEAR

HALL-EFFECT SENSORS

UGN3503LT

(SOT-89/TO-243AA)

Dimensions in Millimeters

(controlling dimensions)

0.155

0.167

0.035

0.047

0.059

BSC

1

0.173

0.181

0.064

0.072

23

0.118

BSC

0.098

0.079

B

0.017

0.022

0.090

0.102

0.014

0.019

0.031

0.055

0.063

0.084

0.090

0.014

0.017

Dwg. MA-009-3 in

3.94

4.25

0.89

1.20

1.50

BSC

1

4.40

4.60

1.62

1.83

23

3.00

BSC

2.5

2.0

B

0.44

0.56

2.29

2.60

0.36

0.48

0.8

1.40

1.60

0.35

0.44

2.13

2.29

Dwg. MA-009-3 mm

A

0.102

0.181

1

2

0.028

TYP

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

3

0.047

0.031

TYP

Dwg. MA-012-3 in

0.7

TYP

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

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

A

13

2

2.6

1.2

0.8

TYP

4.6

Dwg. MA-012-3 mm

3503

RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS

UGN3503U

SEE NOTE

Dimensions in Inches

(controlling dimensions)

0.183

0.178

0.181

0.176

0.086

1 2 3

MAX

0.600

0.560

0.016

0.063

0.059

0.018

0.015

45°

SEE NOTE

Dimensions in Millimeters

(for reference only)

4.65

4.52

4.60

4.47

2.18

1 2 3

MAX

15.24

14.23

1.60

1.50

45°

0.46

0.38

0.41

0.050

0.100

Dwg. MH-003D in

Devices in the ‘U’ package are

NOT RECOMMENDED FOR NEW DESIGN

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. Minimum lead length was 0.500" (12.70 mm). If existing product to the original specifications is not acceptable,
contact sales office before ordering.

1.27

2.54

Dwg. MH-003D mm

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

UGN3503UA

3503

RATIOMETRIC,

LINEAR

HALL-EFFECT SENSORS

SEE NOTE

Dimensions in Inches

(controlling dimensions)

0.164

0.159

45°

0.122

0.117

0.085

123

MAX

0.640

0.600

0.062

0.058

0.031

0.016

0.015

45°

SEE NOTE

Dimensions in Millimeters

(for reference only)

4.17

4.04

45°

3.10

2.97

2.16

123

MAX

16.26

15.24

1.57

1.47

45°

0.79

0.38

0.41

0.050

BSC

Dwg. MH-014D in

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. Minimum lead length was 0.500" (12.70 mm). If existing product to the original specifications is not acceptable,
contact sales office before ordering.

1.27

BSC

Dwg. MH-014D mm

3503

RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS

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.

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