A3516LTL [ETC]
Linear Hall-Effect Sensor ; 线性霍尔效应传感器\n
| 型号： | A3516LTL |
| 厂家： | 
ETC |
| 描述： | Linear Hall-Effect Sensor
|
| 文件： | 总12页 (文件大小：176K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
3515 AND
3516
RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
FOR HIGH-TEMPERATURE OPERATION
The A3515– and A3516– 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 -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.
V
CC
Each BiCMOS monolithic circuit integrates a Hall element, improved
temperature-compensating circuitry to reduce the intrinsic sensitivity drift of
1
2
3
the Hall element, a small-signal high-gain amplifier, and a rail-to-rail low-
impedance 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 recover-
ability 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.
Dwg. PH-006
Pinning is shown viewed from branded side.
These devices are supplied in a 3-pin ultra-mini-SIP ‘UA’ package.
FEATURES
ABSOLUTE MAXIMUM RATINGS
■ Temperature-Stable Quiescent Output Voltage
■ Precise Recoverability After Temperature Cycling
■ Output Voltage Proportional to Applied Magnetic Field
■ Ratiometric Rail-to-Rail Output
■ Improved Sensitivity
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,
■ 4.5 V to 5.5 V Operation
PD ........................................... See Graph
Operating Temperature Range*, TA
■ Immune to Mechanical Stress
■ Small Package Size
Suffix ‘E–’ ..................... -40°C to +85°C
Suffix ‘L–’ .................... -40°C to +150°C
Storage Temperature Range,
■ Solid-State Reliability
TS .................................. -65°C to +170°C
* Infrequent excursions permitted; see
Applications Information.
Always order by complete part number, e.g., A3515LUA .
3515 AND 3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
FUNCTIONAL BLOCK DIAGRAM
1
SUPPLY
Vcc
3
2
OUTPUT
GROUND
+
X
–
+
–
Dwg. FH-016A
Vcc/2
700
600
500
400
300
"U" PACKAGE
RθJA = 183°C/W
"UA" PACKAGE
RθJA = 206°C/W
200
100
0
20
40
60
80
100
120
140
160
AMBIENT TEMPERATURE in °C
Dwg. G
115 Northeast Cutoff, Box 15036
2
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
Supply Voltage
Supply Current
Symbol
VCC
Test Conditions
Min.
4.5
–
Typ. Max. Units
Operating
5.0
7.2
5.5
10
V
mA
V
ICC
B = 0, VCC = 6 V, IO = 0
B = 0, IO = 1 mA, TA = 25°C
Quiescent
VOQ
2.425 2.500 2.575
Voltage Output
Output Voltage
VOH
VOL
IOLM
B = +X*, IO
=
1
mA
–
4.7–
V
B = -X*, IO = -1 mA
B = -X*, VO = 0
–
0.2
–
–
V
Output
-1.0
-1.5
mA
Source Current Limit
Bandwidth (-3 dB)
Clock Frequency
Output Resistance
BW
fC
–
–
–
–
30
–
–
–
–
kHz
kHz
Ω
170
1.0
400
rO
IO ≤ -2 mA
Wide-Band
eo
B = 0, BW = 10 Hz to 10 kHz,
µV
Output Noise (rms)
IO ≤ -1 mA, CO = 100 pF
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), respec-
tively. It is NOT intended to indicate a range of linear operation.
www.allegromicro.com
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
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Units
-40 +85 -40 +150 -40 +85 -40 +150 °C
2.25 2.50 2.75 mV/G
A3515LUA
A3516EUA
A3516LUA
Characteristic*
Operating Temp. Range, TA
Sensitivity at TA = 25°C
∆Sens(∆T) at TA = Max.
∆Sens(∆T) at TA = Min.
–
–
–
–
4.50 5.00 5.50
-2.5 2.5 7.5
-9.0 -1.3 1.0
4.50 5.00 5.50
-2.5 2.5 7.5
-9.0 -1.3 1.0
2.25 2.50 2.75
-2.5 2.5 7.5
-9.0 -1.3 1.0
-2.5 2.5 7.5
-9.0 -1.3 1.0
%
%
G
†
∆VOQ(∆T)
–
–
–
–
–
–
–
±10
–
–
–
–
–
–
–
–
±10
–
–
–
–
–
–
–
–
±10
–
–
–
–
–
–
–
–
±10
–
Ratiometry, ∆VOQ(∆V)
Ratiometry, ∆Sens(∆V)
Positive Linearity, Lin+
Negative Linearity, Lin–
Symmetry
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
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.
115 Northeast Cutoff, Box 15036
4
Worcester, Massachusetts 01615-0036 (508) 853-5000
3515 AND 3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
CHARACTERISTICS DEFINITIONS
Ratiometry. The A3515xUA and A3516xUA feature a
ratiometric output. The quiescent voltage output and sensitivity
are proportional to the supply voltage (ratiometric).
Quiescent Voltage Output. In the quiescent state (no mag-
netic 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
The per cent ratiometric change in the quiescent voltage
output is defined as
VOQ(VCC) / VOQ(5V)
∆VOQ(∆V)
=
x 100%
(4)
VCC / 5 V
VOQ(TA) – VOQ(25°C)
and the per cent ratiometric change in sensitivity is defined as
∆VOQ(∆T)
=
(1)
Sens(25°C)
Sens(VCC) / Sens(5V)
This calculation yields the device’s equivalent accuracy,
over the operating temperature range, in gauss.
∆Sens(∆V)
=
x 100%
(5)
VCC / 5 V
Linearity and Symmetry. The on-chip output stage is de-
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
signed to provide a linear output to within 500 mV of either rail
with a supply voltage of 5 V. This is equivalent to approxi-
mately ±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
Lin+ =
Lin– =
x 100%
x 100%
(6)
(7)
V
O(500G) – VO(-500G)
2 (VO(250G) – VOQ
)
Sens =
(2)
1000 G
VO(-500G) – VOQ
2 (VO(-250G) – VOQ
The stability of sensitivity as a function of temperature is
defined as
)
and output symmetry as
Sym =
Sens(TA) – Sens(25°C)
Sens(25°C)
∆Sens(∆T)
=
x 100%
(3)
VO(500G) – VOQ
VOQ – VO(-500G)
x 100%
(8)
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5
3515 AND 3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
TYPICAL CHARACTERISTICS
1.4
1.2
9.0
8.0
7.0
6.0
Vcc = 5.5 V
Vcc = 5 V
O = -1 mA
I
1.0
0.8
O = 1 mA
I
O = 5 mA
I
O = 10 mA
I
0.6
0.4
125
150
150
100
100
125
-50
-25
0
25
50
75
-50
-25
0
25
50
75
AMBIENT TEMPERATURE IN °C
AMBIENT TEMPERATURE IN °C
Dwg. GH-039-2
Dwg. GH-060-1
2.55
2.54
2.53
2.52
6.0
5.0
A3515–
4.0
2.51
2.50
2.49
2.48
A3515–
3.0
2.0
1.0
0
A3516–
A3516–
Vcc = 5 V
Io = -1 mA
Vcc = 5 V
Io = -1 mA
2.47
2.46
2.45
150
150
100
125
100
125
-50
-25
0
25
50
75
-50
-25
0
25
50
75
AMBIENT TEMPERATURE IN °C
AMBIENT TEMPERATURE IN °C
Dwg. GH-067
Dwg. GH-066
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
6
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
HumidityJESD22-A101
Test Length
Samples
Comments
Device
Temperature
Bias Life
1000
hrs
77
biased
TA = 85°C, RH = 85%
minimum power
Bias Life
JESD22-A108
1000 hrs
168 hrs
77
77
77
77
77
TA = 150°C, TJ = 165°C
(Surge Operating Life)
Autoclave, Unbiased
JESD22-A108
TA = 175°C, TJ = 190°C
JESD22-A102
96 hrs
TA = 121°C, 15 psig
High-Temperature
(Bake) Storage Life
JESD22-A103
1000 hrs
1000 cycles
TA = 170°C
Temperature Cycle
JESD22-A104
ESD,
CDF-AEC-Q100-002
Pre/Post
Reading
3 per
test
Test to failure
Human Body Model
All leads > 3 kV
www.allegromicro.com
7
3515 AND 3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
APPLICATIONS INFORMATION
SENSOR LOCATION
Calibrated linear Hall devices, which can be used to deter-
mine the actual flux density presented to the sensor in a particu-
lar application, are available.
SUFFIX “UA”
ACTIVE AREA DEPTH
For safe, reliable operation, the output should not be pulled
above the supply voltage or pulled below the device ground.
0.0195"
0.50 mm
NOM
0.081"
2.06 mm
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.
0.056"
1.42 mm
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.
A
BRANDED
SURFACE
1
2
3
Dwg. MH-011-7A
These devices can withstand infrequent temperature excur-
sions, 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
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
8
3515 AND 3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
TYPICAL POSITION-SENSING APPLICATIONS
(Alnico 8, dimensions in inches)
+
+
0.21
D
N
S
S
N
SENSOR DEPTH
BELOW PACKAGE FACE
N
S
N
S
S
N
D
0
V
OQ
0.19
S
N
N
S
D
0
VOQ
0.5
GND
0.10
-
0
0.1
0.2
0.3
0.4
-0.06
-0.04
0
0.04
0.06
0.08
-0.10
-0.08
RELATIVE DISTANCE (TOTAL EFFECTIVE AIR GAP)
RELATIVE DISTANCE
+
+
EFFECTIVE
AIR GAP
0.19
EFFECTIVE AIR GAP = 0.050
EFFECTIVE AIR GAP = 0.075
N
S
N
S
D
0.21
D
0
V
OQ
EFFECTIVE AIR GAP = 0.095
0
VOQ
0.25
GND
-
-0.4
-0.2
0
0.2
0.4
0
0.05
0.10
0.15
0.20
RELATIVE DISTANCE
RELATIVE DISTANCE
www.allegromicro.com
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
1.57
1.47
45°
45°
0.122
0.117
3.10
2.97
45°
45°
0.031
0.79
0.085
MAX
2.16
MAX
1
2
3
1
2
3
0.640
0.600
0.0173
0.0138
16.26
15.24
0.44
0.35
0.48
0.36
0.0189
0.0142
SEE NOTE
SEE NOTE
1.27
BSC
0.050
BSC
Dwg. MH-014E mm
Dwg. MH-014E in
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).
115 Northeast Cutoff, Box 15036
10
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)
Dimensions in Millimeters
(for reference only)
0.095
±0.005
2.41
±0.13
0.002
MAX
0.051
MAX
0°–8°
0°–8°
0.51
MIN
0.004
MAX
0.10
MAX
0.020
MIN
FLAT
Dwg. MH-015 in
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 responsibil-
ity for its use; nor for any infringements of patents or other rights of
third parties that may result from its use.
www.allegromicro.com
11
3515 AND 3516
RATIOMETRIC,
LINEAR
HALL-EFFECT SENSORS
HALL-EFFECT SENSORS
LINEAR HALL-EFFECT SENSORS
Partial
Part
Number
Equivalent
Accuracy
(see note 3)
Supply
Voltage (V)
Typical
Sensitivity
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
—
S
LT, UA
UA
UA
<±10 G
<±10 G
<±20 G
<±20 G
E, L
E, L
S, L
S, L
chopper stabilized
chopper stabilized
chopper stabilized
chopper stabilized
2.5 mV/G
5 mV/G
2.5 mV/G
UA
UA
Notes: 1) Typical data is at T = +25°C and nominal operating voltage.
A
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 ∆V
divided by sensitivity.
over the operating temperature range,
OQ
115 Northeast Cutoff, Box 15036
12
Worcester, Massachusetts 01615-0036 (508) 853-5000
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