Sensor Hall Ugn3503U

3503
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.

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS

As motion detectors, gear tooth sensors, and proximity detectors, they are magnetically driven mirrors of mechanical events. As sensitive monitors ofelectromagnets, they can effectively measure a system's performance with negligible system loading while providing isolation from contaminated and electrically noisy environments. 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 ona single chip.
2 3

Data Sheet 27501B*

V

CC

1

X

GROUND

OUTPUT

SUPPLY

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 forcontinuous operation over the temperature range of -20°C to +85°C.

Dwg. PH-006

FEATURES
I I I I I Extremely Sensitive Flat Response to 23 kHz Low-Noise Output 4.5 V to 6 V Operation Magnetically Optimized Package

Pinning is shown viewed from branded side.

ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC ............................. 8 V Magnetic Flux Density, B ......... UnlimitedOperating Temperature Range, TA ............................ -20°C to +85°C Storage Temperature Range, TS ........................... -65°C to +150°C

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

3503 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
FUNCTIONAL BLOCK DIAGRAM

1 VCC

REG.

X

3

OUTPUT

2

GROUND
Dwg. FH-007

ELECTRICAL CHARACTERISTICS at TA = +25°C, VCC = 5 VLimits Characteristic Operating Voltage Supply Current Quiescent Output Voltage Sensitivity Bandwidth (-3 dB) Broadband Output Noise Output Resistance Symbol VCC ICC VOUT ∆VOUT BW Vout ROUT BW = 10 Hz to 10 kHz B=0G B = 0 G to ±900 G Test Conditions Min. 4.5 — 2.25 0.75 — — — Typ. — 9.0 2.50 1.30 23 90 50 Max. 6.0 13 2.75 1.75 — — 220 Units V mA V mV/G kHz µV Ω

All output-voltage measurementsare 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.

115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036(508) 853-5000 Copyright © 1985, 1999, Allegro MicroSystems, Inc.

3503 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
OUTPUT VOLTAGE AS A FUNCTION OF TEMPERATURE
4.0

OUTPUT NOISE AS A FUNCTION OF FREQUENCY
10

OUTPUT NOISE IN µ Vrms √HZ

3.5

VCC = 5V
B= +500G

8.0 VCC = +5V TA = +25°C 6.0

OUTPUT IN VOLTS

3.0

B = 0G 2.5

4.0

2.0

2.0

B= -500G
1.5

0
40 20 0 +25AMBIENT TEMPERATURE IN C +85 +125

10

100 FREQUENCY IN HZ

1K

10K

Dwg. A-12,573

Dwg. A-12,505

SUPPLY CURRENT AS A FUNCTION OF SUPPLY VOLTAGE
12 11 B = 0G TA = +25°C

DEVICE SENSITIVITY AS A FUNCTION OF SUPPLY VOLTAGE
2.5

SUPPLY CURRENT IN mA

TYPICAL SENSITIVITY IN V/G

2.0

TA = +25°C

10

1.5

9.0

1.0

8.0

0.5

7.0 4.5 5.0 5.5 SUPPLY VOLTAGE INVOLTS 6.0

0 4.5 5.0 5.5 SUPPLY VOLTAGE IN VOLTS 6.0

Dwg. A-12,506 Dwg. A-12,507

OUTPUT NULL VOLTAGE AS A FUNCTION OF SUPPLY VOLTAGE
5.0 B = 0G
OUTPUT NULL VOLTAGE IN VOLTS

LINEARITY AND SYMMETRY AS A FUNCTION OF SUPPLY VOLTAGE
100

LINEARITY AND SYMMETRY IN PERCENT

OUTPUT SYMMETRY 99

4.0

TA = +25°C

W ITY BELO LINEAR G B = -900

NULL

3.0

98

VE NU ITY ABO...