A3517 and A3518: Ratiometric Linear Hall-Effect Sensor ICs for High-Temperature Operation

A3517 and A3518
Ratiometric, Linear Hall-Effect Sensor ICs
for High-Temperature Operation
Discontinued Product
These parts are no longer in production The device should not be
purchased for new design applications. Samples are no longer available.
Date of status change: October 31, 2005
Recommended Substitutions:
For new customers or new applications:
• for the A3517, please refer to the Allegro A1321, and
• for the A3518, please refer to the Allegro A1323.
For existing programs only:
• for the A3517, please refer to the Allegro A3515
A3517LUA is replaced by the A3515LUA
A3517SUA is replaced by the A3515EUA
• for the A3518, please refer to the Allegro A3516
A3518LUA is replaced by the A3516LUA
A3518SUA is replaced by the A3516EUA
NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a
product to accommodate changes in production capabilities, alternative product availabilities, or market demand. 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 which may result from its use.
Data Sheet
27501.11B
3517 AND
3518
RATIOMETRIC, LINEAR HALL-EFFECT SENSOR ICS
FOR HIGH-TEMPERATURE OPERATION
X
The A3517xUA and A3518xUA are sensitive, temperature-stable linear
Hall-effect sensor ICs with greatly improved offset characteristics. Ratiometric,
linear Hall-effect devices 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 devices 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 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.
CC
2
3
OUTPUT
SUPPLY
1
GROUND
V
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– .................... -20°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.
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.
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., A3517SUA .
3517 AND 3518
RATIOMETRIC,
LINEAR HALL-EFFECT SENSOR ICS
FOR HIGH-TEMP. OPERATION
FUNCTIONAL BLOCK DIAGRAM
SUPPLY
1
LOW-PASS
FILTER
+
–
X
DYNAMIC
OFFSET CANCELLATION
Vcc
–
+
ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS
800
2
Suffix "–UA"
RθJA = 165°C/W
600
500
400
300
200
Suffix "S–"
100
Suffix "L–"
0
20
40
60
100
80
120
AMBIENT TEMPERATURE in °C
OUTPUT
2
GROUND
Dwg. FH-016A
Vcc/2
700
3
140
160
180
Dwg. GH-046-1A
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1997, 2002 Allegro MicroSystems, Inc.
3517 AND 3518
RATIOMETRIC,
LINEAR HALL-EFFECT SENSOR ICS
FOR HIGH-TEMP. OPERATION
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
12
mA
Quiescent
Voltage Output
VOQ
B = 0, IO = 1 mA, TA = 25°C
2.2
2.5
2.8
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.
www.allegromicro.com
3
3517 AND 3518
RATIOMETRIC,
LINEAR HALL-EFFECT SENSOR ICS
FOR HIGH-TEMP. OPERATION
MAGNETIC CHARACTERISTICS over operating temperature range, at VCC = 5 V, IO = -1 mA
(unless otherwise noted).
Part Numbers
A3517SUA
A3517LUA
A3518SUA
A3518LUA
Characteristic*
Min. Typ. Max.
Min. Typ. Max.
Min. Typ. Max.
Min. Typ. Max.
Operating Temp. Range, T A
-20
–
+85
-40
–
+150
-20
–
+85
-40
–
+150
°C
Sensitivity at TA = 25°C
4.0
5.0
6.0
4.0
5.0
6.0
2.0
2.5
3.0
2.0
2.5
3.0
mV/G
∆Sens(∆T) at TA = Max.
-5.0
2.5
10
-5.0
2.5
10
-5.0
2.5
10
-5.0
2.5
10
%
∆Sens(∆T) at TA = Min.
-9.0 -1.3
6.0
-9.0 -1.3
6.0
-9.0 -1.3
6.0
-9.0 -1.3
6.0
%
Units
∆VOQ(∆T)†
–
–
±20
–
–
±20
–
–
±20
–
–
±20
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 0.018" (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 = 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
3517 AND 3518
RATIOMETRIC,
LINEAR HALL-EFFECT SENSOR ICS
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(25°C)
(1)
Sens(25°C)
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)
(2)
1000 G
The stability of sensitivity as a function of temperature is defined as
∆Sens(∆T) =
Sens(TA) – Sens(25°C)
Sens(25°C)
x 100%
(3)
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) =
VCC / 5 V
x 100%
(4)
and the per cent ratiometric change in sensitivity is defined
as
∆Sens(∆V) =
Sens(VCC) / Sens(5V)
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
Lin+ =
Lin– =
VO(500G) – VOQ
2 (VO(250G) – VOQ)
x 100%
(6)
x 100%
(7)
VO(-500G) – VOQ
2 (VO(-250G) – VOQ)
and output symmetry as
Sym =
www.allegromicro.com
VOQ(VCC) / VOQ(5V)
VO(500G) – VOQ
VOQ – VO(-500G)
x 100%
(8)
5
3517 AND 3518
RATIOMETRIC,
LINEAR HALL-EFFECT SENSOR ICS
FOR HIGH-TEMP. OPERATION
TYPICAL CHARACTERISTICS
1.4
9.0
Vcc = 5.5 V
8.0
OUTPUT RESISTANCE IN Ω
SUPPLY CURRENT IN mA
1.2
7.0
Vcc = 5 V
IO =
1.0
A
-1 m
IO =
IO =
0.8
A
1m
5 mA
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
AMBIENT TEMPERATURE IN °C
Dwg. GH-039-2
6.0
2.54
A3517–
5.0
2.53
2.52
2.51
SENSITIVITY IN mV/G
QUIESCENT OUTPUT VOLTAGE IN VOLTS
150
Dwg. GH-060-1
2.55
A3517–
2.50
A3518–
2.49
2.48
Vcc = 5 V
Io = -1 mA
2.47
4.0
3.0
A3518–
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-067-1
6
125
AMBIENT TEMPERATURE IN ° C
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Dwg. GH-066-1
3517 AND 3518
RATIOMETRIC,
LINEAR HALL-EFFECT SENSOR ICS
FOR HIGH-TEMP. OPERATION
CRITERIA FOR DEVICE QUALIFICATION
All Allegro devices 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
www.allegromicro.com
Comments
Device biased for
minimum power
Test to failure
All leads > 3 kV
7
3517 AND 3518
RATIOMETRIC,
LINEAR HALL-EFFECT SENSOR ICS
FOR HIGH-TEMP. OPERATION
APPLICATIONS INFORMATION
TYPICAL CURRENT-SENSING APPLICATION
Calibrated linear Hall devices, which can be used to
determine the actual flux density presented to the device in a
particular application, are available.
B ≈ N x 6.9 G/A
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 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 device output
voltage will track changes in the LSB value.
Dwg. AH-005A
ELEMENT LOCATION
ACTIVE AREA DEPTH
0.0195"
0.50 mm
NOM
0.056"
1.42 mm
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 devices
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
0.081"
2.06 mm
A
BRANDED
SURFACE
1
2
Dwg. MH-011-7A
www.allegromicro.com
Allegro
8
3
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3517 AND 3518
RATIOMETRIC,
LINEAR HALL-EFFECT SENSOR ICS
FOR HIGH-TEMP. OPERATION
TYPICAL POSITION-SENSING APPLICATIONS
(Alnico 8, dimensions in inches)
+
+
VCC
VCC
0.21
D
N
S
S
N
N
S
S
N
RELATIVE OUTPUT VOLTAGE
D
0
VOQ
0.19
S N
RELATIVE OUTPUT VOLTAGE
S
RELATIVE MAGNETIC FLUX DENSITY
N
RELATIVE MAGNETIC FLUX DENSITY
ELEMENT DEPTH
BELOW PACKAGE FACE
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
Dwg. GH-047
-0.04
0
0.04
RELATIVE DISTANCE
0
RELATIVE DISTANCE
www.allegromicro.com
0.2
0.4
GND
Dwg. GH-048
N
S
D
RELATIVE MAGNETIC FLUX DENSITY
0.21
RELATIVE OUTPUT VOLTAGE
VOQ
RELATIVE OUTPUT VOLTAGE
RELATIVE MAGNETIC FLUX DENSITY
EFFECTIVE AIR GAP = 0.050
S
0
-0.2
Dwg. GH-049
EFFECTIVE
AIR GAP
D
-0.4
GND
0.10
VCC
0.19
-
0.08
+
VCC
N
0.06
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
Dwg. GH-050
9
3517 AND 3518
RATIOMETRIC,
LINEAR HALL-EFFECT SENSOR ICS
FOR HIGH-TEMP. OPERATION
A3517xUA and A3518xUA
Dimensions in Millimeters
(for reference only)
Dimensions in Inches
(controlling dimensions)
0.164
0.159
4.17
4.04
0.062
0.058
45°
0.122
0.117
0.085
MAX
3.10
2.97
45°
1
2
3
0.031
2.16
MAX
0.640
0.600
0.0189
0.0142
45°
1
2
0.44
0.35
0.48
0.36
SEE NOTE
1.27
0.050
BSC
0.79
3
16.26
15.24
0.0173
0.0138
SEE NOTE
1.57
1.47
45°
BSC
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 pieces per bag).
Dwg. MH-014E mm
Radial Lead Form (order A351xxUA-LC)
1
2
3
0.620"
0.500"
(15.7 mm
12.7 mm)
0.100"
(2.5 mm)
0.108"
(2.74 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 SENSOR ICS
FOR HIGH-TEMP. OPERATION
Horizontal-Mount Lead Form (add ‘-TL’ to part number)
Dimensions in Inches
Dimensions in Millimeters
(controlling dimensions)
(for reference only)
0.095
2.41
±0.005
±0.13
0.002
0.051
MAX
0.004
MAX
NOTE:
0°–8°
MAX
0.10
0.020
MIN
FLAT
MAX
Dwg. MH-015 in
0°–8°
0.51
MIN
FLAT
Dwg. MH-015 mm
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.
www.allegromicro.com
11
3517 AND 3518
RATIOMETRIC,
LINEAR HALL-EFFECT SENSOR ICS
FOR HIGH-TEMP. OPERATION
HALL-EFFECT SENSOR ICS
LINEAR HALL-EFFECT SENSOR ICS
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
Similar pages