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Part: A3503
Category:
Description: Ratiometric Linear Hall-effect Sensor
Company: Allegro Micro Systems, Inc.
Datasheet: Download A3503 datasheet File size : 116 kB
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Datasheet text preview:
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 of electromagnets, 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 on a 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 for continuous operation over the temperature range of -20°C to +85°C.
Dwg. PH-006
FEATURES
s s s s s 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 ......... Unlimited Operating 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 V
Limits Characteristic Operating Voltage Supply Current Quiescent Output Voltage Sensitivity Bandwidth (-3 dB) Broadband Output Noise Output Resistance Symbol VCC I CC V OUT V O U T BW V out 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
All output-voltage measurements are made with a voltmeter having an input impedance of at least 10 k. Magnetic flux density is measured at most sensitive area of device located 0.0165" (0.42 mm) below the branded face of the `U' package; 0.0195" (0.50 mm) below the branded face of the `UA' package; and 0.0305" (0.775 mm) below the branded face of the `LT' package.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1985, 2002 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 +25 AMBIENT 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 IN VOLTS 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
OW ITY BEL LINEAR G B = -900
NULL
3.0
98
VE NU ITY ABO LINEAR 0G B = +90
LL
2.0
97 TA = +25°C 96
1.0
0 4.5 5.0 5.5 SUPPLY VOLTAGE IN VOLTS 6.0
95 4.5 5.0 5.5 SUPPLY VOLTAGE IN VOLTS 6.0
Dwg. A-12,508
Dwg.A-12,509
www.allegromicro.com
3503 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
OPERATION
NOTCH SENSOR 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.
Dwg. A-12,574
GEAR TOOTH SENSOR
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. Calibrated linear Hall devices, which can be used to determine the actual flux density presented to the sensor in a particular application, are available.
N
SENSOR LOCATIONS
SUFFIX "U"
ACTIVE AREA DEPTH 0.0165" 0.42 mm
NOM
0.093" 2.37 mm
0.072" 1.83 mm
32
1
Dwg. A-12,512
CURRENT MONITOR
A
BRANDED SURFACE 1 2 3
Dwg. MH-002-5D
SUFFIX "LT"
ACTIVE AREA DEPTH 0.0305" 0.775 mm NOM 0.091" 2.32 mm 0.042" 1.08 mm
SUFFIX "UA"
ACTIVE AREA DEPTH 0.0195" 0.50 mm NOM 0.084" 2.13 mm
0.056" 1.43 mm
A
1 2 3
BRANDED SURFACE
A
1 2 3
Dwg. A-12,513
Dwg. MH-008-9A
Dwg. MH-011-3D
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3503 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
UGN3503LT
(SOT89/TO-243AA) Dimensions in Inches (for reference only) Dimensions in Millimeters (controlling dimensions)
0.181 0.173 0.072 0.064 0.167 0.155 0.102 0.090
0.063 0.055
0.0173 0.0138
4.60 4.40 1.83 1.62 4.25 3.94 2.60 2.29
1.60 1.40
0.44 0.35
1
2
3
0.090 0.084
1
2
3
2.29 2.13
0.047 0.035 0.059
BSC
0.0189 0.0142 0.0221 0.0173 0.118
BSC
Dwg. MA-009-3A in
1.20 0.89 1.50
BSC
0.48 0.36 0.56 0.44 3.00
BSC
Dwg. MA-009-3A mm
0.098 0.079 B A 0.031 0.102 0.181 3 0.047 0.031
TYP
2.5 2.0 B A 0.8 2.6 4.6 1.2 0.8
TYP
1 0.028
TYP
2
1 0.7
TYP
2
3
Pads 1, 2, 3, and A -- Standard SOT89 Layout Pads 1, 2, 3, and B -- Low-Stress Version Pads 1, 2, and 3 only -- Lowest Stress, But Not Self Aligning
Dwg. MA-012-3 in
Pads 1, 2, 3, and A -- Standard SOT89 Layout Pads 1, 2, 3, and B -- Low-Stress Version Pads 1, 2, and 3 only -- Lowest Stress, But Not Self Aligning
Dwg. MA-012-3 mm
NOTES: 1. Exact body and lead configuration at vendor's option within limits shown. 2. Supplied in bulk pack (500 pieces per bag) or add "TR" to part number for tape and reel. 3. Only low-temperature (240°C) reflow-soldering techniques are recommended for SOT89 devices.
www.allegromicro.com
Others parts begin by a3
A3-1 A3-2 A3-3 A3-4
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