ETC A3516LTL

AND
Data Sheet
27501.10B†
3515
3516
RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
FOR HIGH-TEMPERATURE OPERATION
X
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 -40°C and +150°C. 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.
CC
2
3
OUTPUT
SUPPLY
1
GROUND
V
Dwg. PH-006
Pinning is shown viewed from branded side.
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.
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–’ ..................... -40°C to +85°C
Suffix ‘L–’ .................... -40°C to +150°C
Storage Temperature Range,
TS .................................. -65°C to +170°C
* Infrequent excursions permitted; see
Applications Information.
FEATURES
■ 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., A3515LUA .
3515 AND 3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
FUNCTIONAL BLOCK DIAGRAM
SUPPLY
1
LOW-PASS
FILTER
+
–
X
DYNAMIC
OFFSET CANCELLATION
Vcc
ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS
"U" PACKAGE
RθJA = 183°C/W
500
400
300
"UA" PACKAGE
RθJA = 206°C/W
200
100
0
40
60
100
80
AMBIENT TEMPERATURE in °C
120
140
160
Dwg. G
2
2
GROUND
Dwg. FH-016A
700
20
OUTPUT
+
Vcc/2
600
3
–
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1996, 2002 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
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Supply Voltage
VCC
Operating
4.5
5.0
5.5
V
Supply Current
ICC
B = 0, VCC = 6 V, IO = 0
–
7.2
10
mA
Quiescent
Voltage Output
VOQ
B = 0, IO = 1 mA, TA = 25°C
2.425
2.500
2.575
V
Output Voltage
VOH
B = +X*, IO = 1 mA
–
4.7
–
V
VOL
B = -X*, IO = -1 mA
–
0.2
–
V
Output
Source Current Limit
IOLM
B = -X*, VO = 0
-1.0
-1.5
–
mA
Bandwidth (-3 dB)
BW
–
30
–
kHz
Clock Frequency
fC
–
170
–
kHz
Output Resistance
rO
IO ≤ -2 mA
–
1.0
–
Ω
Wide-Band
Output Noise (rms)
eo
B = 0, BW = 10 Hz to 10 kHz,
IO ≤ -1 mA, CO = 100 pF
–
400
–
µV
NOTE 1 – Typical data is at TA = 25°C 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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3
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
A3515LUA
A3516EUA
A3516LUA
Characteristic*
Min. Typ. Max.
Min. Typ. Max.
Min. Typ. Max.
Min. Typ. Max.
Operating Temp. Range, TA
-40
-40
-40
-40
Sensitivity at TA = 25°C
4.50 5.00 5.50
4.50 5.00 5.50
2.25 2.50 2.75
2.25 2.50 2.75
∆Sens(∆T) at TA = Max.
-2.5
2.5
7.5
-2.5
2.5
7.5
-2.5
2.5
7.5
-2.5
2.5
7.5
%
∆Sens(∆T) at TA = Min.
-9.0 -1.3
1.0
-9.0 -1.3
1.0
-9.0 -1.3
1.0
-9.0 -1.3
1.0
%
∆VOQ(∆T)
–
+85
–
+150
–
+85
–
+150
Units
°C
mV/G
–
–
±10
–
–
±10
–
–
±10
–
–
±10
G
Ratiometry, ∆VOQ(∆V)
–
100
–
–
100
–
–
100
–
–
100
–
%
Ratiometry, ∆Sens(∆V)
–
100
–
–
100
–
–
100
–
–
100
–
%
Positive Linearity, Lin+
–
100
–
–
100
–
–
100
–
–
100
–
%
Negative Linearity, Lin–
–
100
–
–
100
–
–
100
–
–
100
–
%
Symmetry
–
100
–
–
100
–
–
100
–
–
100
–
%
†
NOTE 1 – Magnetic flux density is measured at most sensitive area of device located 0.0195" (0.50 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 = 25°C 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(∆T) =
VOQ(TA) – VOQ(25°C)
Sens(25°C)
(1)
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
Sens =
VO(500G) – VO(-500G)
1000 G
Sens(TA) – Sens(25°C)
Sens(25°C)
The per cent ratiometric change in the quiescent voltage
output is defined as
∆VOQ(∆V) =
VCC / 5 V
Sens(VCC) / Sens(5V)
∆Sens(∆V) =
x 100%
(4)
VCC / 5 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
(2)
Lin– =
VO(500G) – VOQ
2 (VO(250G) – VOQ)
VO(-500G) – VOQ
2 (VO(-250G) – VOQ)
x 100%
(6)
x 100%
(7)
and output symmetry as
x 100%
(3)
Sym =
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VOQ(VCC) / VOQ(5V)
and the per cent ratiometric change in sensitivity is defined as
Lin+ =
The stability of sensitivity as a function of temperature is
defined as
∆Sens(∆T) =
Ratiometry. The A3515xUA and A3516xUA feature a
ratiometric output. The quiescent voltage output and sensitivity
are proportional to the supply voltage (ratiometric).
VO(500G) – VOQ
VOQ – VO(-500G)
x 100%
(8)
5
3515 AND 3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
TYPICAL CHARACTERISTICS
1.4
9.0
Vcc = 5.5 V
OUTPUT RESISTANCE IN Ω
SUPPLY CURRENT IN mA
1.2
8.0
7.0
Vcc = 5 V
IO =
1.0
A
-1 m
IO =
IO =
A
1m
5 mA
0.8
0 mA
IO = 1
0.6
6.0
-50
-25
0
25
50
100
75
125
0.4
-50
150
-25
0
25
50
100
75
Dwg. GH-039-2
Dwg. GH-060-1
2.55
6.0
2.54
A3515–
5.0
2.53
2.52
2.51
SENSITIVITY IN mV/G
QUIESCENT OUTPUT VOLTAGE IN VOLTS
150
AMBIENT TEMPERATURE IN °C
AMBIENT TEMPERATURE IN °C
A3515–
2.50
A3516–
2.49
2.48
Vcc = 5 V
Io = -1 mA
2.47
4.0
3.0
A3516–
2.0
Vcc = 5 V
Io = -1 mA
1.0
2.46
2.45
-50
-25
0
25
50
75
100
125
150
0
-50
-25
0
25
50
75
100
125
150
AMBIENT TEMPERATURE IN °C
AMBIENT TEMPERATURE IN °C
Dwg. GH-067
6
125
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Dwg. GH-066
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
Test Method and Test Conditions
Test Length
Samples
Temperature Humidity
Bias Life
JESD22-A101
TA = 85°C, RH = 85%
1000 hrs
77
Bias Life
JESD22-A108
TA = 150°C, TJ = 165°C
1000 hrs
77
(Surge Operating Life)
JESD22-A108
TA = 175°C, TJ = 190°C
168 hrs
77
Autoclave, Unbiased
JESD22-A102
TA = 121°C, 15 psig
96 hrs
77
High-Temperature
(Bake) Storage Life
JESD22-A103
TA = 170°C
1000 hrs
77
Temperature Cycle
JESD22-A104
1000 cycles
77
ESD,
Human Body Model
CDF-AEC-Q100-002
Pre/Post
Reading
3 per
test
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Comments
Device biased for
minimum power
Test to failure
All leads > 3 kV
7
3515 AND 3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
APPLICATIONS INFORMATION
SENSOR LOCATION
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 µF 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.
SUFFIX “UA”
ACTIVE AREA DEPTH
0.0195"
0.50 mm
NOM
0.081"
2.06 mm
0.056"
1.42 mm
A
BRANDED
SURFACE
1
2
Dwg. MH-011-7A
These devices can withstand infrequent temperature excursions, beyond the Absolute Maximum Ratings, to
TA = 170°C provided the junction temperature, TJ, does not
exceed 200°C.
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
Allegro
www.allegromicro.com
TYPICAL CURRENT-SENSING APPLICATION
B ≈ N x 6.9 G/A
Dwg. AH-005A
8
3
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)
+
+
0.21
D
N
S
N
N
S
S
N
S
RELATIVE MAGNETIC FLUX DENSITY
RELATIVE MAGNETIC FLUX DENSITY
SENSOR DEPTH
BELOW PACKAGE FACE
N
S
D
0
VOQ
0.19
S N
N S
D
0
0
0.1
0.2
0.3
0.4
RELATIVE DISTANCE (TOTAL EFFECTIVE AIR GAP)
VOQ
0.5
-0.10
+
-0.08
-0.06
-0.04
0
0.04
RELATIVE DISTANCE
GND
0.10
EFFECTIVE
AIR GAP
EFFECTIVE AIR GAP = 0.050
S
D
0
VOQ
-
GND
-0.2
0
RELATIVE DISTANCE
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0.2
0.4
N
S
D
RELATIVE MAGNETIC FLUX DENSITY
N
RELATIVE MAGNETIC FLUX DENSITY
0.08
+
0.19
-0.4
0.06
0.21
EFFECTIVE AIR GAP = 0.075
EFFECTIVE AIR GAP = 0.095
0
0
0.05
0.10
0.15
RELATIVE DISTANCE
0.20
VOQ
0.25
9
3515 AND 3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
A3515xUA and A3516xUA
Dimensions in Inches
(controlling dimensions)
Dimensions in Millimeters
(for reference only)
0.164
0.159
4.17
4.04
0.062
0.058
45°
1.57
1.47
45°
0.122
0.117
3.10
2.97
45°
0.085
1
2
3
45°
0.031
2.16
MAX
1
2
3
0.79
MAX
0.0189
0.0142
SEE NOTE
0.48
0.36
SEE NOTE
1.27
0.050
BSC
0.44
0.35
16.26
15.24
0.0173
0.0138
0.640
0.600
Dwg. MH-014E in
BSC
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).
10
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Dwg. MH-014E mm
3515 AND 3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
Surface-Mount Lead Form (add ‘-TL’ to part number)
0.004
MAX
Dimensions in Inches
Dimensions in Millimeters
(controlling dimensions)
(for reference only)
0.095
2.41
±0.005
±0.13
0.002
0.051
MAX
MAX
0°–8°
0.10
0.020
MIN
FLAT
MAX
Dwg. MH-015 in
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
3515 AND 3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
HALL-EFFECT SENSORS
LINEAR HALL-EFFECT SENSORS
Partial
Part
Number
Supply
Voltage (V)
Typical
Sensitivity
Equivalent
Accuracy
(see note 3)
Oper.
Temp.
Packages
Comments
UGN3503
A3515x
A3516x
A3517x
A3518x
4.5 to 6
4.5 to 5.5
4.5 to 5.5
4.5 to 5.5
4.5 to 5.5
1.3 mV/G
5 mV/G
2.5 mV/G
5 mV/G
2.5 mV/G
—
<±10 G
<±10 G
<±20 G
<±20 G
S
E, L
E, L
S, L
S, L
LT, UA
UA
UA
UA
UA
chopper stabilized
chopper stabilized
chopper stabilized
chopper stabilized
Notes: 1) Typical data is at TA = +25°C and nominal operating voltage.
2) “x” = Operating Temperature Range [suffix letter or (prefix)]: S (UGN) = -20°C to +85°C, E = -40°C to +85°C,
J = -40°C to +115°C, K (UGS) = -40°C to +125°C, L (UGL) = -40°C to +150°C.
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