A3362ELHLTTR [ALLEGRO]
Sensor/Transducer, Open-collector, Bipolar, 3 Pin, Plastic/epoxy;
| 型号： | A3362ELHLTTR |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | Sensor/Transducer, Open-collector, Bipolar, 3 Pin, Plastic/epoxy |
| 文件： | 总12页 (文件大小：519K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
A3361 and A3362
2-Wire Chopper Stabilized Hall Effect Switches
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: May 1, 2006
Recommended Substitutions:
For existing customer transition, and for new customers or new appli-
cations, refer to the A1142 and A1143.
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 respon-
sibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
3361 AND
3362
2-WIRE, CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
The A3361x and A3362x Hall-effect switches are extremely
temperature-stable and stress-resistant sensors. Superior performance
over temperature is made possible through dynamic offset cancellation,
which reduces the residual offset voltage normally caused by device
overmolding, temperature dependencies, and thermal stress. The two
devices differ only in output polarity; the A3361x output current goes
low in the presence of a south pole of sufficient strength; the A3362x
output current goes high.
Suffix Code 'LH' Pinning
(SOT23W)
3
Each device includes on a single silicon chip a voltage regulator,
Hall-voltage generator, small-signal amplifier, chopper stabilization,
Schmitt trigger, and a constant-current open-collector output. An
on-board regulator permits operation with supply voltages of 3.5 to 24
volts. Noise radiation is limited by control of the output current slew
rate.
NC
1
2
Three package styles provide a magnetically optimized package for
most applications. Suffix ‘xLH’ is a miniature SOT23W low-profile
surface-mount package, and suffix 'xUA' is a three-lead ultra-mini SIP
for through-hole mounting.
Dwg. PH-003-5
Pinning is shown viewed from branded side.
FEATURES
■ Internal Current Regulator for 2-Wire Operation
■ Resistant to Physical Stress
■ Superior Temperature Stability
■ Operation From Unregulated Supply
■ Solid-State Reliability
ABSOLUTE MAXIMUM RATINGS
at T =+25°C
A
Supply Voltage, VCC ........................ 26.5 V
Reverse Battery Voltage, VRCC .......... -16 V
Magnetic Flux Density, B ........... Unlimited
Package Power Dissipation, PD . See Graph
■ Small Size
Junction Temperature, TJ ............... +170
°C
Operating Temperature Range,
TA ............................... -40
°
C to +85
°C
Storage Temperature Range,
Always order by complete part number: the prefix 'A' + the basic four-digit
part number + a suffix to indicate operating temperature range (E) +
a two-letter suffix to indicate package style, e.g., A3361ELH .
TS .............................. -65
°C to +170°C
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
FUNCTIONAL BLOCK DIAGRAM
SUPPLY
TO ALL
SUBCIRCUITS
REG.
X
GROUND
F
&
S
D
L
O
Dwg. FH-020-4
Suffix Code 'UA' Pinning
(ultra-mini SIP)
X
1
2
3
S
G
G
Dwg. PH-003-7A
Pinning is shown viewed from branded side.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 2002, 2003 Allegro MicroSystems, Inc.
2
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
ELECTRICAL CHARACTERISTICS over operating temperature range.
Limits
Characteristic
Supply Voltage
Output Current
Symbol
Test Conditions
Operating
Min. Typ. Max.
Units
V
VCC
IGND(L)
IGND(H)
fC
3.5
5.0
12
–
12
–
24
6.9
17
–
Output Current Low
Output Current High
mA
mA
kHz
µs
–
Chopping Frequency
Output Settling Time
Output Rise Time
340
–
tsd
CL = 20 pF
CL = 20 pF
CL = 20 pF
VRCC = -16 V
–
50
–
tr
–
3.5
3.5
–
µs
Output Fall Time
tf
–
–
µs
Reverse Battery Current
ICC
–
-15
mA
NOTE: Typical Data is at TA = +25°C and VCC = 12 V and is for design information only.
A3361 MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.
Limits
Characteristic
Operate Point
Release Point
Hysteresis
Symbol
BOP
Test Conditions
B > BOP, IGND = LOW
B < BRP, IGND = HIGH
BOP - BRP
Min. Typ. Max.
Units
G
–
–
–
–
125
–
BRP
40
5.0
G
Bhys
30
G
A3362 MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.
Limits
Characteristic
Operate Point
Release Point
Symbol
BOP
Test Conditions
Min. Typ. Max.
Units
G
B > BOP, IGND = HIGH
B < BRP, IGND = LOW
–
–
–
–
125
–
BRP
40
5.0
G
Hysteresis
Bhys
BOP - BRP
30
G
NOTE: 1 gauss is exactly equal to 0.1 millitesla (mt).
www.allegromicro.com
3
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
OUTPUT CHARACTERISTICS
A3361x
A3362x
+I
+I
IOUT + ICC
IOUT + ICC
B
B
OP
B
B
OP
RP
RP
ICC
ICC
0
0
0
+B
0
+B
FLUX DENSITY
FLUX DENSITY
Dwg. GH-007-4
Dwg. GH-007-3
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
4
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
SENSOR LOCATIONS
800
700
Suffix "–UA"
RqJA= 165°C/W
Package Designator “LH”
ACTIVE AREA DEPTH
0.011"
0.28 mm
NOM
0.059"
600
500
400
300
200
1.49 mm
3
0.038"
Suffix "–LH"
RqJA= 228°C/W
0.96 mm
A
1
2
Dwg. MH-025
100
0
20
40
60
80
100
120
140
160
180
AMBIENT TEMPERATURE in °C
Allegro
Dwg. GH-046-4
APPLICATIONS INFORMATION
Package Designators “UA"
Extensive applications information for Hall-effect sensors
is available in:
ACTIVE AREA DEPTH
• Hall-Effect IC Applications Guide, Application Note 27701;
• Hall-Effect Devices: Soldering, Gluing, Potting, Encapsulat-
ing, and Lead Forming, Application Note 27703.1;
• Soldering of Through-Hole Hall-Sensor Dervices, Application
Note 27703; and
0.0195"
0.50 mm
NOM
0.080"
2.04 mm
0.056"
1.44 mm
• Soldering of Surface-Mount Hall-Sensor Devices, Application
Note 27703.2.
A
BRANDED
SURFACE
More detailed descriptions of the chopper-stabilized circuit
operation can be found in:
1
2
3
• Monolithic Magnetic Hall Sensor Using Dynamic Quadrature
Offset Cancelation, Technical Paper STP 97-10; and
• Chopper-Stabilized Amplifiers With A Track-and-Hold Signal
Demodulator, Technical Paper STP 99-1.
Dwg. MH-011-9B
All are provided at
Although sensor location is accurate to three sigma for a
particular design, product improvements may result in small
changes to sensor location.
www.allegromicro.com
www.allegromicro.com
5
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
FUNCTIONAL DESCRIPTION
Chopper-Stabilized Technique. The Hall element can be
considered as a resistor array similar to a Wheatstone bridge. A
large portion of the offset is a result of the mismatching of these
resistors. These devices use a proprietary dynamic offset
cancellation technique, with an internal high-frequency clock to
reduce the residual offset voltage of the Hall element that is
normally caused by device overmolding, temperature dependen-
cies, and thermal stress. The chopper-stabilizing technique
cancels the mismatching of the resistor circuit by changing the
direction of the current flowing through the Hall plate using
CMOS switches and Hall voltage measurement taps, while
maintaing the Hall-voltage signal that is induced by the external
magnetic flux. The signal is then captured by a sample-and-
hold circuit and further processed using low-offset bipolar
circuitry. This technique produces devices that have an
extremely stable quiescent Hall output voltage, are immune to
thermal stress, and have precise recoverability after temperature
cycling. This technique will also slightly degrade the device
output repeatability. A relatively high sampling frequency is
used in order that faster signals can be processed.
Operation. As shown in the output characteristic graphs, the
output of the A3362 turns on when a magnetic field (south pole)
perpendicular to the Hall sensor is increased above the operate
point threshold (BOP). After turn on, the output will source
current equal to the device operating current plus a current
source (IGND(H)). When the magnetic field is decreased below
the release point (BRP), the output turns off and will source
current equal only to the Hall-effect sensor operating current
(IGND(L)). The A3361 output is inverted and the device turns off
at BOP and on at BRP. The difference in the magnetic operate
and release points is the hysteresis (Bhys) of the device. The
hysteresis allows clean switching of the output even in the
presence of external mechanical vibration or electrical noise.
Applications. It is strongly recommended that an external
bypass capacitor be connected (in close proximity to the Hall
sensor) between the supply and ground of the device to reduce
both external noise and noise generated by the chopper-
stabilization technique.
REG
B
+V
—
X
HALL
VOLTAGE
+
Dwg. AH-011-2
Dwg. EH-012
'UA' PACKAGE
X
0.95 V
–
+
100 Ω
0.1 µF
SUPPLY
Dwg. EH-011-2A
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
6
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
Operating Characteristics
Avg. IccL @ 3.5 V
Avg. IccH @ 3.5 V
7.0
6.8
6.6
6.4
6.2
6.0
5.8
5.6
5.4
5.2
5.0
17.0
16.0
15.0
14.0
13.0
12.0
-40
25
85
-40
25
85
Temperature (°C)
Temperature (°C)
Avg. IccL @ 24 V
Avg. IccH @ 24 V
7.0
6.8
6.6
6.4
6.2
6.0
5.8
5.6
5.4
5.2
5.0
17.0
16.0
15.0
14.0
13.0
12.0
-40
25
85
-40
25
85
60
Temperature (°C)
Temperature (°C)
Avg. IccL @ 25°C
Avg. IccH @ 25°C
7.0
6.8
6.6
6.4
6.2
6.0
5.8
5.6
5.4
5.2
5.0
15.4
15.3
15.2
15.1
15.0
14.9
14.8
14.7
14.6
14.5
IccH 3.5
IccH 24
IccL 3.5
IccL 24
Voltage (V)
Voltage (V)
Avg. IrBat
5.0
4.5
4.0
3.5
3.0
2.5
2.0
-40
25
85
Temperature (°C)
www.allegromicro.com
7
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
Operating Characteristics
Avg. Brp @ 25°C
Avg. Bhys @ 25°C
Avg. Bop @ 25°C
120.0
29.0
27.0
25.0
23.0
21.0
19.0
17.0
15.0
13.0
11.0
9.0
120.0
110.0
110.0
100.0
100.0
90.0
90.0
80.0
70.0
60.0
50.0
40.0
80.0
70.0
60.0
50.0
40.0
7.0
5.0
Bhys 3.5
Bhys 24
Brp 3.5
Brp 24
Bop 3.5
Bop 24
Voltage (V)
Voltage (V)
Voltage (V)
Avg. Bop @ 24 V
Avg. Brp @ 24 V
Avg. Bhys @ 24 V
120.0
110.0
100.0
90.0
120.0
110.0
100.0
90.0
29.0
27.0
25.0
23.0
21.0
19.0
17.0
15.0
13.0
11.0
9.0
80.0
80.0
70.0
70.0
60.0
60.0
50.0
50.0
7.0
5.0
40.0
-40
40.0
-40
25
85
-40
25
85
25
85
Temperature (°C)
Temperature (°C)
Temperature (°C)
Avg. Bop @ 3.5 V
Avg. Brp @ 3.5 V
Avg. Bhys @ 3.5 V
120.0
110.0
100.0
90.0
29.0
27.0
25.0
23.0
21.0
19.0
17.0
15.0
13.0
11.0
9.0
120.0
110.0
100.0
90.0
80.0
80.0
70.0
70.0
60.0
60.0
50.0
50.0
7.0
40.0
-40
5.0
40.0
-40
25
85
-40
25
85
25
85
Temperature (°C)
Temperature (°C)
Temperature (°C)
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
8
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
PACKAGE DESIGNATOR 'LH'
(fits SC-59A solder-pad layout)
Dimensions in Inches
(for reference only)
Dimensions in Millimeters
(controlling dimensions)
0.122
0.114
3.10
2.90
0.020
0.012
0.50
0.30
3
3
0.083
0.073
0.118
0.106
2.10
1.85
3.00
2.70
0.020
0.25
1
2
1
2
BSC
BSC
GAUGE PLANE
GAUGE PLANE
SEATING PLANE
SEATING PLANE
0.55
REF
0.022
REF
0.25
MIN
0.020
MIN
0° TO 8°
0° TO 8°
0.0079
0.95
BSC
0.037
BSC
0.20
0.15
0.00
0.006
0.000
0.127
0.0050
1.13
0.87
0.045
0.032
Dwg. MA-010-3C mm
Dwg. MA-010-3C in
0.028
0.70
3
3
0.039
1.00
0.094
2.40
1
2
1
2
0.037
0.95
Dwg. MA-011-3 in
Dwg. MA-011-3 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. Where no tolerance is specified, dimension is nominal.
5. Add "TR" to part number for tape and reel.
www.allegromicro.com
9
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
PACKAGE DESIGNATOR ‘UA’
Dimensions in Millimeters
Dimensions in Inches
(controlling dimensions)
(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
2.16
MAX
0.085
MAX
1
2
3
1
2
3
16.26
15.24
0.44
0.35
0.640
0.600
0.0173
0.0138
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
Radial Lead Form (order A326xEUA-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
0.108"
(2.74 mm)
0.620"
0.500"
(15.7 mm
12.7 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).
www.allegromicro.com
10
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
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 responsi-
bility for its use; nor for any infringements of patents or other rights of
third parties that may result from its use.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
11
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