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3515 3516
AND
RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMPERATURE OPERATION
The A3515- and A3516- are sensitive, temperature-stable linear Halleffect 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 A3515- features an output sensitivity of 5 mV/G, while the A3516- 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 high-frequency 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 devices are supplied in a 3-pin ultra-mini-SIP `UA' package.
Data Sheet 27501.10B*
V
CC
1
X
2
3
GROUND
Dwg. PH-006
Pinning is shown viewed from branded side.
OUTPUT
SUPPLY
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 `E-' ..................... -40C to +85C Suffix `L-' .................... -40C to +150C Storage Temperature Range, TS .................................. -65C to +170C * Infrequent excursions permitted; see Applications Information.
FEATURES
I Temperature-Stable Quiescent Output Voltage I Precise Recoverability After Temperature Cycling I Output Voltage Proportional to Applied Magnetic Field I Ratiometric Rail-to-Rail Output I Improved Sensitivity I 4.5 V to 5.5 V Operation I Immune to Mechanical Stress I Small Package Size I Solid-State Reliability
Always order by complete part number, e.g., A3515LUA .
3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
FUNCTIONAL BLOCK DIAGRAM
1
SUPPLY Vcc
DYNAMIC OFFSET CANCELLATION
LOW-PASS FILTER
700
ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS
600
500
400
300 "UA" PACKAGE RJA = 206C/W 200
100
0 20 40 60 100 80 AMBIENT TEMPERATURE in C 120 140 160
Dwg. GH-046A
2
+ -
X
3
OUTPUT
- +
2
GROUND
Vcc/2
Dwg. FH-016A
"U" PACKAGE RJA = 183C/W
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 1996, 2000 Allegro MicroSystems, Inc.
3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
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 - 2.425 Typ. 5.0 7.2 2.500 Max. 5.5 10 2.575 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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3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
MAGNETIC CHARACTERISTICS over operating temperature range, at VCC = 5 V, IO = -1 mA (unless otherwise noted).
Part Numbers A3515EUA Characteristic* Operating Temp. Range, TA Sensitivity at TA = 25C Sens(T) at TA = Max. Sens(T) at TA = Min. VOQ(T)
A3515LUA Min. Typ. Max. -40 - +150
A3516EUA Min. Typ. Max. -40 - +85
A3516LUA Min. Typ. Max. -40 - +150 Units C mV/G % % G % % % % %
Min. Typ. Max. -40 - +85
4.50 5.00 5.50 -2.5 2.5 7.5 1.0 10 - - - - -
4.50 5.00 5.50 -2.5 2.5 7.5 1.0 10 - - - - -
2.25 2.50 2.75 -2.5 2.5 7.5 1.0 10 - - - - -
2.25 2.50 2.75 -2.5 2.5 7.5 1.0 10 - - - - -
-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
Ratiometry, VOQ(V) Ratiometry, Sens(V) Positive Linearity, Lin+ Negative Linearity, Lin- Symmetry
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 "UA" 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
3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
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(TA) - VOQ(25C) Sens(25C) Ratiometry. The A3515xUA and A3516xUA 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(VCC) / VOQ(5V) VCC / 5 V
VOQ(V) =
x 100%
(4)
VOQ(T) =
(1)
and the per cent ratiometric change in sensitivity is defined as Sens(VCC) / Sens(5V) VCC / 5 V
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
Sens(V) =
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)
Lin+ = (2)
x 100%
(6)
Sens =
The stability of sensitivity as a function of temperature is defined as Sens(TA) - Sens(25C) Sens(25C)
Lin- =
x 100%
(7)
and output symmetry as x 100% (3) Sym = VO(500G) - VOQ VOQ - VO(-500G) x 100% (8)
Sens(T) =
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3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
TYPICAL CHARACTERISTICS
1.4
9.0
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
7.0
0.8
0 mA 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 A3515- 5.0
QUIESCENT OUTPUT VOLTAGE IN VOLTS
2.53
SENSITIVITY IN mV/G
2.52 2.51 2.50 2.49 2.48 2.47 2.46 2.45 -50 Vcc = 5 V Io = -1 mA
4.0
A3515- A3516-
3.0 A3516- 2.0 Vcc = 5 V Io = -1 mA
1.0
-25
0
25
50
75
100
125
150
0 -50
-25
0
25
50
75
100
125
150
AMBIENT TEMPERATURE IN C
Dwg. GH-067
AMBIENT TEMPERATURE IN C
Dwg. GH-066
6
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
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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3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
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 A3515xUA and A3516xUA 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
ACTIVE AREA DEPTH 0.018" 0.46 mm NOM
SENSOR LOCATION
SUFFIX "UA"
0.081" 2.06 mm
0.056" 1.42 mm
A
BRANDED SURFACE 1 2 3
Dwg. MH-011-7
Allegro
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TYPICAL CURRENT-SENSING APPLICATION
B N x 6.9 G/A
Dwg. AH-005A
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115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
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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3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
A3515xUA and A3516xUA
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
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 devices per bag).
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115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
Surface-Mount Lead Form (add `-TL' to part number)
Dimensions in Inches
(controlling dimensions)
0.095
0.005
Dimensions in Millimeters
(for reference only)
2.41
0.13
0.002
MAX
0.051
MAX
0.004 0-8
MAX
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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3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
HALL-EFFECT SENSORS
Partial Part Number 3503 3507 3508 3515 3516 3517 3518 3060 3422 3059 3056 3058 3421 3054 3209 3210 3421 3422 3425 Avail. Oper. Characteristics at TA = +25C Temp. BOP max BRP min Bhys typ Features RATIOMETRIC, LINEAR HALL-EFFECT SENSORS Notes
S typ. 1.3 mV/G E/L typ. 2.5 mV/G S typ. 2.5 mV/G E/L typ. 5.0 mV/G chopper stabilized E/L typ. 2.5 mV/G chopper stabilized L/S typ. 5.0 mV/G chopper stabilized L/S typ. 2.5 mV/G chopper stabilized GEARTOOTH/RING MAGNET (DUAL ELEMENT) HALL-EFFECT SENSORS in order of BOP K/S E/L K/S E/L E/L E/L K/S E E E/L E/L L +35 +75 +100 +150 +250 +280 -35 -75 -100 -150 -250 -280 30 46 130 50 200 335 ac coupled direction detection ac coupled zero-speed zero-speed direction detection 4
SPECIAL-PURPOSE HALL-EFFECT SENSORS +300 +5.0 50 unipolar switch, multiplexed 60 5.0 7.7 400 W, chopper stabilized 60 5.0 7.7 25 W, chopper stabilized +280 -280 335 direction detection +85 -85 46 direction detection +24 -24 19 dual, chopper stabilized
1
Operating Temperature Ranges: S = -20C to +85C, E = -40C to +85C, J = -40C to +115C, K = -40C to +125C, L = -40C to +150C Notes 1. Protected. 4. Multiplexed two-wire sensor; after proper address, power/signal bus current indicates magnetic field condition.
12
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

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