A3260LUA-LC [ALLEGRO]
Analog Circuit, 1 Func, BIPolar, PSIP3, ULTRA MINI, SIP-3;
| 型号： | A3260LUA-LC |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | Analog Circuit, 1 Func, BIPolar, PSIP3, ULTRA MINI, SIP-3 |
| 文件： | 总10页 (文件大小：189K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
3260
2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT BIPOLAR SWITCH
The A3260-- Hall-effect bipolar switch is an extremely
Suffix Code 'LH' Pinning
temperature-stable and stress-resistant sensor especially suited for
operation over extended temperature ranges to +150°C. Superior
high-temperature performance is made possible through dynamic
offset cancellation, which reduces the residual offset voltage normally
caused by device overmolding, temperature dependencies, and thermal
stress.
(SOT23W)
3
The 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. A south
pole of sufficient strength will turn the output OFF. 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
The first character of the part number suffix determines the device
operating temperature range; suffix ‘E–’ is -40°C to +85°C and ‘L–’ is
-40°C to +150°C. Three package styles provide a magnetically opti-
mized package for most applications. Suffix ‘–LH’ is a miniature
SOT23W low-profile surface-mount package, ‘–LT’ is a miniature
SOT89/TO-243AA transistor package for surface-mount applications;
while suffix ‘–UA’ 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
■ Output Slew Rate Controlled
■ Resistant to Physical Stress
■ Superior Temperature Stability
■ Operation From Unregulated Supply
■ Reverse Battery Protection
■ Solid-State Reliability
ABSOLUTE MAXIMUM RATINGS
at T =+25°C
A
Supply Voltage, VCC ........................... 27 V
Reverse Battery Voltage, VRCC .......... -16 V
Magnetic Flux Density, B ........... Unlimited
Package Power Dissipation, PD . See Graph
Junction Temperature, TJ ............... +170°C
Operating Temperature Range, TA
■ Small Size
Suffix ‘E–’.................. -40°C to +85°C
Suffix ‘L–’................ -40°C to +150°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 +
a suffix to indicate package style, e.g., A3260ELH .
TS .............................. -65°C to +170°C
3260
2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT
BIPOLAR SWITCH
FUNCTIONAL BLOCK DIAGRAM
SUPPLY
TO ALL
SUBCIRCUITS
REG.
X
GROUND
Dwg. FH-020-4
Suffix Code 'UA' Pinning
Suffix Code 'LT' Pinning
(ultra-mini SIP)
(SOT89/TO-243AA)
NC
1
2
3
1
2
3
Dwg. PH-003-7A
Dwg. PH-003-6
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
3260
2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT
BIPOLAR SWITCH
ELECTRICAL CHARACTERISTICS over operating supply voltage and temperature ranges.
Limits
Characteristic
Supply Voltage
Output Current
Symbol
VCC
Test Conditions
Operating
B > BOP
Min. Typ. Max.
Units
V
3.5
12
24
IGND(L)
IGND(H)
-4.0
-6.5
-8.0
mA
mA
B < BRP
-11 -14.5 -18
Chopping Frequency
Output Slew Rate
fC
di/dt
tsd
–
0.5
—
–
340
—
—
–
–
kHz
mA/µs
µs
CL = 20 pF
CL = 20 pF
VRCC = -16 V
2.0
20
Output Settling Time
Reverse Battery Current
ICC
-15
mA
NOTES: 1. BOP = operate point (output turns OFF); BRP = release point (output turns ON).
2. Typical Data is at TA = +25°C and VCC = 12 V and is for design information only.
MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.
Limits
Characteristic
Operate Point
Release Point
Hysteresis
Symbol
BOP
Test Conditions
Min. Typ. Max.
Units
G
–
10
-10
20
40
–
BRP
-40
2.0
G
Bhys
BOP - BRP
–
G
NOTES: 1. Typical Data is at TA = +25°C and VCC = 12 V and is for design information only.
2. 1 gauss (G) is exactly equal to 0.1 millitesla (mT).
www.allegromicro.com
3
3260
2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT
BIPOLAR SWITCH
800
700
SENSOR LOCATIONS
Suffix "–UA"
θJA = 165°C/W
R
Package Designator “LH”
600
500
400
300
200
100
0
ACTIVE AREA DEPTH
0.011"
Suffix "–LT"
θJA = 180°C/W
0.059"
Suffix "–LH"
θJA = 228°C/W
R
0.28 mm
1.49 mm
R
NOM
3
0.038"
0.96 mm
A
Suffix "E–"
1
2
Dwg. MH-025
Suffix "L–"
140
Package Designator “LT”
20
40
60
80
100
120
160
180
°
AMBIENT TEMPERATURE in
C
Dwg. GH-046-2D
ACTIVE AREA DEPTH
0.0305"
0.775 mm
NOM
0.088"
2.24 mm
0.045"
1.14 mm
Allegro
A
1
2
3
Dwg. MH-008-8A
Package Designators “UA” and "UA-TL"
ACTIVE AREA DEPTH
0.0195"
0.080"
0.50 mm
2.04 mm
NOM
0.056"
1.44 mm
A
BRANDED
SURFACE
1
2
3
Dwg. MH-011-9B
Although sensor location is accurate to three sigma for a
particular design, product improvements may result in small
changes to sensor location.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
4
3260
2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT
BIPOLAR SWITCH
FUNCTIONAL DESCRIPTION
Chopper-Stabilized Technique. 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 dependencies, and thermal stress.
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 repeat-
ability.
REG
X
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. The chopper-
stabilizing technique cancels the mismatching of the resistors by
changing the direction of the current flowing through the Hall
plate and Hall voltage measurement taps, while maintaining the
Hall-voltage signal that is induced by the external magnetic
flux. The signal is, then, captured by a sample-and-hold circuit.
Dwg. EH-012
B
+V
—
Operation. The output of these devices turns ON when a
magnetic field (north pole) perpendicular to the Hall sensor
exceeds the release point threshold (BRP). 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
increased (south pole) above the operate point (BOP), the output
will source current equal to the Hall-effect sensor operating
current with the current source turned OFF (IGND(L)). Note
especially that release can occur when the magnetic field is
removed but to ensure release, a field reversal is required. 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 me-
chanical vibration or electrical noise.
HALL
VOLTAGE
+
Dwg. AH-011-2
+I
IOUT + ICC
Powering up in the absence of a magnetic field (less than
B
OP and higher than BRP) will allow an indeterminate output
BOP
BRP
state. The correct state is warranted after the first excursion
beyond BOP or BRP.
ICC
Bipolar switches may switch on removal of field but
require field reversal for reliable operation over temperature
range; latches will not switch on removal of magnetic field.
0
-B
0
+B
FLUX DENSITY
Dwg. GH-034-6
www.allegromicro.com
5
3260
2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT
BIPOLAR SWITCH
APPLICATIONS INFORMATION
It is strongly recommended that an external bypass capaci-
tor 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 tech-
nique.
'UA' PACKAGE
X
0.95 V
–
+
100 Ω
0.1 µF
SUPPLY
Dwg. EH-011-2A
Extensive applications information for Hall-effect sensors is available in:
• Hall-Effect IC Applications Guide, Application Note 27701;
• Hall-Effect Devices: Soldering, Gluing, Potting, Encapsulating, and Lead Forming, Application Note 27703.1;
• Soldering of Through-Hole Hall-Sensor Dervices, Application Note 27703; and
• Soldering of Surface-Mount Hall-Sensor Devices, Application Note 27703.2.
More detailed descriptions of the chopper-stabilized circuit operation can be found in:
• 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.
All are provided at
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
6
3260
2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT
BIPOLAR SWITCH
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
0.010
0.25
1
2
1
2
BSC
BSC
GAUGE PLANE
GAUGE PLANE
SEATING PLANE
SEATING PLANE
0.022
0.55
REF
REF
0.010
MIN
0.25
MIN
0° TO 8°
0.0079
0° TO 8°
0.95
BSC
0.037
BSC
0.20
0.006
0.000
0.15
0.00
0.0050
0.127
0.045
0.032
1.13
0.87
Dwg. MA-010-3D in
Dwg. MA-010-3D mm
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 "LT" to part number for tape and reel.
www.allegromicro.com
7
3260
2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT
BIPOLAR SWITCH
PACKAGE DESIGNATOR 'LT'
(SOT89/TO-243AA)
Dimensions in Inches
(for reference only)
Dimensions in Millimeters
(controlling dimensions)
4.60
4.40
1.83
1.62
1.60
1.40
0.181
0.173
0.072
0.064
0.063
0.055
0.44
0.35
0.0173
0.0138
2.60
2.29
2.29
2.13
0.102
0.090
0.090
0.084
4.25
3.94
0.167
0.155
2
3
1
2
3
1
0.48
0.36
0.0189
0.0142
0.0221
0.0173
0.047
1.20
0.035
0.89
0.56
0.44
1.50
0.059
BSC
BSC
0.118
3.00
BSC
BSC
Dwg. MA-009-3A in
Dwg. MA-009-3A mm
0.098
0.079
2.5
2.0
B
0.031
B
0.8
0.102
0.181
2.6
A
2
A
4.6
0.047
3
1.2
0.8
1
1
2
3
0.028
TYP
0.031
TYP
0.7
TYP
TYP
Pads 1, 2, 3, and A — Standard SOT89 Layout
Pads 1, 2, 3, and B — Low-Stress Version
Pads 1, 2, and 3 only — Lowest Stress, But Not Self Aligning
Pads 1, 2, 3, and A — Standard SOT89 Layout
Pads 1, 2, 3, and B — Low-Stress Version
Pads 1, 2, and 3 only — Lowest Stress, But Not Self Aligning
Dwg. MA-012-3 mm
Dwg. MA-012-3 in
NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown.
2. Supplied in bulk pack (500 pieces per bag) or add "TR" to part number for tape and reel.
3. Only low-temperature (≤240°C) reflow-soldering techniques are recommended for SOT89 devices.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
8
3260
2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT
BIPOLAR SWITCH
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 A3260xUA-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
9
3260
2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT
BIPOLAR SWITCH
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
10
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