Allegro UGN3503UA, UGN3503LT, UGN3503U Datasheet
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 (508) 853-5000
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
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