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3517 AND 3518
RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMPERATURE OPERATION
The A3517xUA and A3518xUA are sensitive, temperature-stable linear Hall-effect sensors with greatly improved offset characteristics. Ratiometric, linear Hall-effect sensors provide a voltage output that is proportional to the applied magnetic field and have a quiescent output voltage that is approximately 50% of the supply voltage. These magnetic sensors are ideal for use in linear and rotary position sensing systems in the harsh environments of automotive and industrial applications over extended temperatures to -40C and +150C. The A3517xUA features an output sensitivity of 5 mV/G while the A3518xUA has an output sensitivity of 2.5 mV/G. See the Magnetic Characteristics table for complete, individual device parametrics. Each BiCMOS monolithic circuit integrates a Hall element, improved temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, and a rail-to-rail lowimpedance output stage. A proprietary dynamic offset cancelation technique, with an internal highfrequency clock, reduces the residual offset voltage, which is normally caused by device overmolding, temperature dependancies, and thermal stress. This technique produces devices that have an extremely stable quiescent output voltage, are immune to mechanical stress, and have precise recoverability after temperature cycling. Many problems normally associated with low-level analog signals are minimized by having the Hall element and amplifier in a single chip. Output precision is obtained by internal gain and offset trim adjustments during the manufacturing process. These reduced-cost devices are supplied in a 3-pin ultra-mini-SIP "UA" package only.
Data Sheet 27501.11A*
V
CC
1
X
2
3
GROUND
Dwg. PH-006
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC ......................... 8.0 V Output Voltage, VO ........................... 8.0 V Output Sink Current, IO .................. 10 mA Magnetic Flux Density, B ......... Unlimited Package Power Dissipation, PD .................................... See Graph Operating Temperature Range*, TA Suffix S- .................... -20C to +85C Suffix L- .................... -40C to +150C Storage Temperature Range, TS ............................. -65C to +170C * Infrequent excursions permitted; see Applications Information.
OUTPUT
SUPPLY
FEATURES
s s s s s s s s s Temperature-Stable Quiescent Output Voltage Precise Recoverability After Temperature Cycling Output Voltage Proportional to Applied Magnetic Field Ratiometric Rail-to-Rail Output Improved Sensitivity 4.5 V to 5.5 V Operation Immune to Mechanical Stress Small Package Size Solid-State Reliability
Always order by complete part number, e.g., A3517SUA .
3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION
FUNCTIONAL BLOCK DIAGRAM
1
SUPPLY Vcc
DYNAMIC OFFSET CANCELLATION
LOW-PASS FILTER
800
ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS
700 Suffix "-UA" RJA = 165C/W 600
500
400
300
200 Suffix "S-" 100 Suffix "L-" 0 20 40 60 100 80 120 AMBIENT TEMPERATURE in C 140 160 180
Dwg. GH-046-1A
2
+ -
X
3
OUTPUT
- +
2
GROUND
Vcc/2
Dwg. FH-016A
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 1997, 2002 Allegro MicroSystems, Inc.
3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION
ELECTRICAL CHARACTERISTICS over operating temperature range, at VCC = 5 V (unless otherwise noted).
Limits Characteristic Supply Voltage Supply Current Quiescent Voltage Output Output Voltage Symbol VCC ICC VOQ VOH VOL Output Source Current Limit Bandwidth (-3 dB) Clock Frequency Output Resistance Wide-Band Output Noise (rms) IOLM BW fC rO eo IO -2 mA B = 0, BW = 10 Hz to 10 kHz, IO -1 mA, CO = 100 pF Test Conditions Operating B = 0, VCC = 6 V, IO = 0 B = 0, IO = 1 mA, TA = 25C B = +X*, IO = 1 mA B = -X*, IO = -1 mA B = -X*, VO = 0 Min. 4.5 - 2.2 Typ. 5.0 7.2 2.5 Max. 5.5 12 2.8 Units V mA V
- - -1.0
4.7 0.2 -1.5
- - -
V V mA
- - - -
30 170 1.0 400
- - - -
kHz kHz V
NOTE 1 - Typical data is at TA = 25C and is for design information only. NOTE 2 - Negative current is defined as coming out of (sourcing) the output. * This test requires positive and negative fields sufficient to swing the output driver between fully OFF and saturated (ON), respectively. It is NOT intended to indicate a range of linear operation.
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3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION
MAGNETIC CHARACTERISTICS over operating temperature range, at VCC = 5 V, IO = -1 mA (unless otherwise noted).
Part Numbers A3517SUA Characteristic* Operating Temp. Range, T A Sensitivity at TA = 25C Sens(T) at TA = Max. Sens(T) at TA = Min. VOQ(T) Ratiometry, VOQ(V) Ratiometry, Sens(V) Positive Linearity, Lin+ Negative Linearity, Lin- Symmetry Min. Typ. Max. -20 4.0 -5.0 - 5.0 2.5 +85 6.0 10 6.0 20 - - - - - A3517LUA Min. Typ. Max. -40 4.0 -5.0 - 5.0 2.5 +150 6.0 10 6.0 20 - - - - - A3518SUA Min. Typ. Max. -20 2.0 -5.0 - 2.5 2.5 +85 3.0 10 6.0 20 - - - - - A3518LUA Min. Typ. Max. -40 2.0 -5.0 - 2.5 2.5 +150 3.0 10 6.0 20 - - - - - Units C mV/G % % G % % % % %
-9.0 -1.3 - - - - - - - 100 100 100 100 100
-9.0 -1.3 - - - - - - - 100 100 100 100 100
-9.0 -1.3 - - - - - - - 100 100 100 100 100
-9.0 -1.3 - - - - - - - 100 100 100 100 100
NOTE 1 - Magnetic flux density is measured at most sensitive area of device located 0.018" (0.46 mm) below the branded face of the package. NOTE 2 - 10 G = 1 mT, exactly. NOTE 3 - Except for Sens(T), typical data is at TA = 25C and is for design information only. * See Characteristics Definitions for test conditions. This calculation (formula 1, next page) yields the device's equivalent accuracy, over the operating temperature range, in gauss.
4
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION
CHARACTERISTICS DEFINITIONS
Quiescent Voltage Output. In the quiescent state (no magnetic field), the output is ideally equal to one-half of the supply voltage over the operating voltage and temperature range (VOQ VCC/2). Due to internal component tolerances and thermal considerations, there is a tolerance on the quiescent voltage output and on the quiescent voltage output as a function of supply voltage and ambient temperature. For purposes of specification, the quiescent voltage output as a function of temperature is defined as VOQ(T) = VOQ(TA) - VOQ(25C) Sens(25C) Ratiometry. The A3517xUA and A3518xUA feature a ratiometric output. The quiescent voltage output and sensitivity are proportional to the supply voltage (ratiometric). The per cent ratiometric change in the quiescent voltage output is defined as VOQ(V) = (1) and the per cent ratiometric change in sensitivity is defined as Sens(V) = Sens(VCC) / Sens(5V) VCC / 5 V VOQ(VCC) / VOQ(5V) VCC / 5 V
x 100%
(4)
This calculation yields the device's equivalent accuracy, over the operating temperature range, in gauss. Sensitivity. The presence of a south-pole magnetic field perpendicular to the package face (the branded surface) will increase the output voltage from its quiescent value toward the supply voltage rail by an amount proportional to the magnetic field applied. Conversely, the application of a north pole will decrease the output voltage from its quiescent value. This proportionality is specified as the sensitivity of the device and is defined as VO(500G) - VO(-500G) 1000 G
x 100%
(5)
Linearity and Symmetry. The on-chip output stage is designed to provide a linear output to within 500 mV of either rail with a supply voltage of 5 V. This is equivalent to approximately 800 gauss of ambient field. Although application of stronger magnetic fields will not damage these devices, it will force the output into a non-linear region. Linearity in per cent is measured and defined as VO(500G) - VOQ 2 (VO(250G) - VOQ) VO(-500G) - VOQ 2 (VO(-250G) - VOQ)
Sens =
(2) Lin+ =
x 100%
(6)
The stability of sensitivity as a function of temperature is defined as Lin- = Sens(T) = Sens(TA) - Sens(25C) Sens(25C) x 100% (3)
x 100%
(7)
and output symmetry as VO(500G) - VOQ VOQ - VO(-500G)
Sym =
x 100%
(8)
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5
3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION
TYPICAL CHARACTERISTICS
9.0
1.4
Vcc = 5.5 V
1.2 Vcc = 5 V
SUPPLY CURRENT IN mA
8.0
OUTPUT RESISTANCE IN
IO =
1.0
-1 m
A
IO =
IO =
1m
A
5 mA
0 mA
7.0
0.8
IO = 1
0.6
6.0
-50
-25
0
25
50
75
100
125
150
0.4 -50
-25
0
25
50
75
100
125
150
AMBIENT TEMPERATURE IN C
Dwg. GH-039-2
AMBIENT TEMPERATURE IN C
Dwg. GH-060-1
2.55 2.54
6.0 A3517- 5.0
QUIESCENT OUTPUT VOLTAGE IN VOLTS
2.53 2.52 2.51 2.50 2.49 2.48 2.47 2.46 2.45 -50
0 -50
A3517- A3518-
SENSITIVITY IN mV/G
4.0
3.0 A3518- 2.0 Vcc = 5 V Io = -1 mA
Vcc = 5 V Io = -1 mA
1.0
-25
0
25
50
75
100
125
150
-25
0
25
50
75
100
125
150
AMBIENT TEMPERATURE IN C
Dwg. GH-067-1
AMBIENT TEMPERATURE IN C
Dwg. GH-066-1
6
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION
CRITERIA FOR DEVICE QUALIFICATION
All Allegro sensors are subjected to stringent qualification requirements prior to being released to production. To become qualified, except for the destructive ESD tests, no failures are permitted. Qualification Test Temperature Humidity Bias Life Bias Life Test Method and Test Conditions JESD22-A101 TA = 85C, RH = 85% JESD22-A108 TA = 150C, TJ = 165C JESD22-A108 TA = 175C, TJ = 190C JESD22-A102 TA = 121C, 15 psig JESD22-A103 TA = 170C JESD22-A104 CDF-AEC-Q100-002 Test Length 1000 hrs Samples 77 Comments Device biased for minimum power
1000 hrs
77
(Surge Operating Life)
168 hrs
77
Autoclave, Unbiased
96 hrs
77
High-Temperature (Bake) Storage Life Temperature Cycle ESD, Human Body Model
1000 hrs
77
1000 cycles Pre/Post Reading
77 3 per test Test to failure All leads > 3 kV
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3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION
APPLICATIONS INFORMATION
Calibrated linear Hall devices, which can be used to determine the actual flux density presented to the sensor in a particular application, are available. For safe, reliable operation, the output should not be pulled above the supply voltage or pulled below the device ground. For optimum performance, a 0.1 F capacitor between the supply and ground, and a 100 pF capacitor between the output and ground, should be added. The ratiometric feature is especially valuable when these devices are used with an analog-to-digital converter. A/D converters typically derive their LSB step size by ratioing off a reference voltage line. If the reference voltage varies, the LSB will vary proportionally. This is a major error source in many sensing systems. The A3517xUA and A3518xUA can eliminate this source of error by their ratiometric operation. Because their gain and offsets are proportional to the supply voltage, if they are powered from the A/D reference voltage, the sensor output voltage will track changes in the LSB value. These devices can withstand infrequent temperature excursions, beyond the Absolute Maximum Ratings, to TA = 170C provided the junction temperature, TJ, does not exceed 200C. Extensive applications information on Hall-effect sensors and magnets is also available in the "Hall-Effect IC Applications Guide", which can be found in the latest issue of the Allegro MicroSystems Electronic Data Book, AMS-702 or Application Note 27701, or at
BRANDED SURFACE
Dwg. AH-005A
TYPICAL CURRENT-SENSING APPLICATION
B N x 6.9 G/A
SENSOR LOCATION
ACTIVE AREA DEPTH 0.0195" 0.50 mm NOM 0.081" 2.06 mm
0.056" 1.42 mm
A
1 2 3
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Dwg. MH-011-7A
Allegro
8
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION
TYPICAL POSITION-SENSING APPLICATIONS
(Alnico 8, dimensions in inches)
+
VCC
+
0.21
VCC
D
SENSOR DEPTH BELOW PACKAGE FACE
N S
S N
N
S
RELATIVE MAGNETIC FLUX DENSITY
RELATIVE MAGNETIC FLUX DENSITY
RELATIVE OUTPUT VOLTAGE
D
0
VOQ
0.19
SN
NS D
0 0 0.1 0.2 0.3 0.4 RELATIVE DISTANCE (TOTAL EFFECTIVE AIR GAP)
VOQ 0.5
Dwg. GH-047
-0.10 -0.08 -0.06 -0.04 0 0.04 RELATIVE DISTANCE 0.06 0.08
GND 0.10
Dwg. GH-049
+
VCC
+
EFFECTIVE AIR GAP
VCC
0.19
N S
EFFECTIVE AIR GAP = 0.050
N 0.21
S D
RELATIVE MAGNETIC FLUX DENSITY
RELATIVE OUTPUT VOLTAGE
EFFECTIVE AIR GAP = 0.075
0
VOQ
EFFECTIVE AIR GAP = 0.095
-0.4 -0.2 0 RELATIVE DISTANCE 0.2 0.4
GND
Dwg. GH-048
0 0 0.05 0.10 0.15 RELATIVE DISTANCE 0.20
VOQ 0.25
Dwg. GH-050
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RELATIVE OUTPUT VOLTAGE
D
RELATIVE MAGNETIC FLUX DENSITY
RELATIVE OUTPUT VOLTAGE
N S
S N
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3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION
A3517xUA and A3518xUA
Dimensions in Inches (controlling dimensions)
0.164 0.159
Dimensions in Millimeters (for reference only)
4.17 4.04
45
0.062 0.058
45
1.57 1.47
0.122 0.117 45 0.031
3.10 2.97 45 0.79
0.085
MAX
1
2
3
2.16
MAX
1
2
3
0.640 0.600
0.0173 0.0138
16.26 15.24
0.44 0.35
SEE NOTE
0.0189 0.0142
SEE NOTE
0.48 0.36
0.050
BSC
Dwg. MH-014E in
1.27
BSC
Dwg. MH-014E mm
Radial Lead Form (order A351xxUA-LC)
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. Where no tolerance is specified, dimension is nominal. 6. Supplied in bulk pack (500 pieces per bag).
1
2
3
0.620" 0.500" (15.7 mm 12.7 mm)
0.108" (2.74 mm)
0.100" (2.5 mm)
Dwg. MH-026
NOTE: Lead-form dimensions are the nominals produced on the forming equipment. No dimensional tolerance is implied or guaranteed for bulk packaging (500 pieces per bag).
10
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION
Surface-Mount Lead Form (add `-TL' to part number)
Dimensions in Inches
(controlling dimensions)
Dimensions in Millimeters
(for reference only)
0.095
0.005
2.41
0.13
0.002
MAX
0.051
MAX
0.004
MAX
0-8 0.020
MIN FLAT
Dwg. MH-015 in
0.10
MAX
0-8 0.51
MIN FLAT
Dwg. MH-015 mm
NOTE:
Supplied in bulk pack (500 devices per bag).
The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending. 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 performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro products are not authorized for use as critical components in life-support appliances, devices, or systems without express written approval. 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 that may result from its use.
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11
3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION
HALL-EFFECT SENSORS
LINEAR HALL-EFFECT SENSORS Partial Part Number UGN3503 A3515x A3516x A3517x A3518x Supply Voltage (V) 4.5 to 6 4.5 to 5.5 4.5 to 5.5 4.5 to 5.5 4.5 to 5.5 Typical Sensitivity 1.3 mV/G 5 mV/G 2.5 mV/G 5 mV/G 2.5 mV/G Equivalent Accuracy (see note 3) -- <10 G <10 G <20 G <20 G Oper. Temp. S E, L E, L S, L S, L
Packages LT, UA UA UA UA UA
Comments chopper stabilized chopper stabilized chopper stabilized chopper stabilized
Notes: 1) Typical data is at TA = +25C and nominal operating voltage. 2) "x" = Operating Temperature Range [suffix letter or (prefix)]: S (UGN) = -20C to +85C, E = -40C to +85C, J = -40C to +115C, K (UGS) = -40C to +125C, L (UGL) = -40C to +150C. 3) Linear Hall-effect equivalent accuracy is defined as VOQ over the operating temperature range, divided by sensitivity.
12
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

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