Allegro A3362LH 2-wire, chopper-stabilized, hall-effect switch Datasheet

Data Sheet
27621.50
3361 AND
3362
2-WIRE, CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
Suffix Code 'LH' Pinning
3
X
NC
NO (INTERNAL)
CONNECTION
Dwg. PH-003-5
2
GROUND
SUPPLY
1
Pinning is shown viewed from branded side.
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.
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.
Three package styles provide a magnetically optimized package for
most applications. Suffix ‘xLH’ is a miniature low-profile surfacemount package, ‘xLT’ is a miniature SOT-89/TO-243AA transistor
package for surface-mount applications; while suffix ‘xUA’ is a threelead ultra-mini-SIP for through-hole mounting.
PRELIMINARY INFORMATION
(subject to change without notice)
August 28, 2000
FEATURES
ABSOLUTE MAXIMUM RATINGS
at TA=+25°C
■ Internal Current Regulator for 2-Wire Operation
■ Resistant to Physical Stress
Supply Voltage, VCC ........................ 26.5 V
■ Superior Temperature Stability
Reverse Battery Voltage, VRCC .......... -16 V
■ Operation From Unregulated Supply
Magnetic Flux Density, B ........... Unlimited
■ Solid-State Reliability
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,
TS .............................. -65°C to +170°C
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 .
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
FUNCTIONAL BLOCK DIAGRAM
LOW-PASS
FILTER
TO ALL
SUBCIRCUITS
SAMPLE
& HOLD
X
REG.
DYNAMIC
OFFSET CANCELLATION
SUPPLY
GROUND
Dwg. FH-020-6
Suffix Code 'UA' Pinning
(SIP)
Suffix Code 'LT' Pinning
(SOT-89/TO-243AA)
X
X
GROUND
GROUND
Dwg. PH-003-7A
1
2
Dwg. PH-003-6
Pinning is shown viewed from branded side.
2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 2000, Allegro MicroSystems, Inc.
3
NO (INTERNAL)
CONNECTION
3
GROUND
2
SUPPLY
1
SUPPLY
NC
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
ELECTRICAL CHARACTERISTICS over operating temperature range.
Limits
Characteristic
Symbol
Supply Voltage
VCC
Output Current
Test Conditions
Min.
Typ.
Max.
Units
Operating
3.5
12
24
V
IGND(L)
Output Current Low
5.0
–
6.9
mA
IGND(H)
Output Current High
12
–
17
mA
–
340
–
kHz
Chopping Frequency
fC
Output Settling Time
tsd
CL = 20 pF
–
–
50
µs
Output Rise Time
tr
CL = 20 pF
–
3.5
–
µs
Output Fall Time
tf
CL = 20 pF
–
3.5
–
µs
VRCC = -16 V
–
–
-15
mA
Reverse Battery Current
ICC
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
Symbol
Operate Point
BOP
Release Point
Hysteresis
Test Conditions
Min.
Typ.
Max.
Units
B > BOP, IGND = LOW
–
–
125
G
BRP
B < BRP, IGND = HIGH
40
–
–
G
Bhys
BOP - BRP
5.0
–
30
G
A3362 MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.
Limits
Characteristic
Symbol
Operate Point
BOP
Release Point
Hysteresis
www.allegromicro.com
Test Conditions
Min.
Typ.
Max.
Units
B > BOP, IGND = HIGH
–
–
125
G
BRP
B < BRP, IGND = LOW
40
–
–
G
Bhys
BOP - BRP
5.0
–
30
G
3
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
OUTPUT CHARACTERISTICS
A3361x
A3362x
+I
+I
IOUT + ICC
OUTPUT CURRENT
OUTPUT CURRENT
IOUT + ICC
B RP
B RP
B OP
ICC
ICC
0
0
0
+B
FLUX DENSITY
4
B OP
Dwg. GH-007-4
0
+B
FLUX DENSITY
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Dwg. GH-007-3
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
SENSOR LOCATIONS
Package Designator “LH”
ACTIVE AREA DEPTH
0.011"
0.28 mm
NOM
0.059"
1.49 mm
3
0.038"
0.96 mm
A
1
2
Dwg. MH-025
Package Designator “LT”
ACTIVE AREA DEPTH
0.030"
0.76 mm
NOM
ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS
700
(±0.005” [0.13 mm] die placement)
600
Suffix "–UA"
RθJA = 206°C/W
500
Suffix "–LH"
RθJA = 248°C/W
400
Suffix "–LT"
RθJA = 258°C/W
300
200
100
0
20
40
60
80
120
100
AMBIENT TEMPERATURE in °C
140
160
180
Dwg. GH-046-4
0.088"
2.24 mm
0.045"
1.14 mm
A
1
2
3
Dwg. MH-008-8
Package Designators “UA” and "UA-TL"
ACTIVE AREA DEPTH
0.018"
0.46 mm
NOM
0.080"
2.04 mm
0.056"
1.44 mm
Allegro
A
BRANDED
SURFACE
1
2
3
Dwg. MH-011-9A
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
5
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
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.
6
Qualification Test
Test Method and Test Conditions
Test Length
Samples
Biased Humidity (HAST)
TA = 130°C, RH = 85%
50 hrs
77
VCC = VOUT = 5 V
High-Temperature
Operating Life (HTOL)
JESD22-A108,
TA = 150°C, TJ = 165°C
408 hrs
77
VCC = 24 V,
VOUT = 20 V
Accelerated HTOL
JESD22-A108,
TA = 175°C, TJ = 190°C
504 hrs
77
VCC = 24 V,
VOUT = 20 V
Autoclave, Unbiased
JESD22-A102, Condition C,
TA = 121°C, 15 psig
96 hrs
77
High-Temperature
(Bake) Storage Life
MIL-STD-883, Method 1008,
TA = 170°C
1000 hrs
77
Temperature Cycle
MIL-STD-883, Method 1010,
-65°C to +150°C
500 cycles
77
Latch-Up
—
Pre/Post
Reading
6
Electro-Thermally
Induced Gate Leakage
—
Pre/Post
Reading
6
ESD,
Human Body Model
CDF-AEC-Q100-002
Pre/Post
Reading
x per
test
Electrical Distributions
Per Specification
—
30
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Comments
Test to failure,
All leads > TBD
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 dependencies, 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-andhold 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.
More detailed descriptions of the circuit operation can be
found in: Technical Paper STP 97-10, Monolithic Magnetic
Hall Sensor Using Dynamic Quadrature Offset Cancellation
and Technical Paper STP 99-1, Chopper-Stabilized Amplifiers
With A Track-and-Hold Signal Demodulator.
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 chopperstabilization technique.
Extensive applications information on magnets and Halleffect sensors is also available in the Allegro Electronic Data
Book AMS-702 or Application Note 27701 or
www.allegromicro.com
SAMPLE
& HOLD
REG
B
+V
—
X
HALL
VOLTAGE
+
Dwg. AH-011-2
Dwg. EH-012
'UA' PACKAGE
–
+
3
2
X
0.95 V
0.1 µF
100 Ω
1
SUPPLY
Dwg. EH-011-2A
www.allegromicro.com
7
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
PACKAGE DESIGNATOR 'LH'
(fits SC-74A solder-pad layout)
Dimensions in Inches
(for reference only)
0.122
0.114
0.020
0.012
0.083
0.073
3.10
2.90
0.0079
0.0050
3
1
Dimensions in Millimeters
(controlling dimensions)
0.118
0.106
2
0.020 MIN
0.022
2.10
1.85
0.20
0.127
3
1
3.00
2.70
2
0° TO 8°
REF
0.037
0.95
BSC
BSC
0.006
0.000
0.25 MIN
0.55
0° TO 8°
REF
0.50
0.30
0.043
0.035
0.049
0.035
1.10
0.90
1.25
0.90
0.15
0.00
Dwg. MA-010-3B mm
Dwg. MA-010-3B in
0.028
0.70
3
3
0.039
1.00
0.094
1
NOTES: 1.
2.
3.
4.
8
2
2.40
1
2
0.037
0.95
Dwg. MA-011-3 in
Dwg. MA-011-3 mm
Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point (parting line).
Exact body and lead configuration at vendor’s option within limits shown.
Height does not include mold gate flash.
Where no tolerance is specified, dimension is nominal.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
PACKAGE DESIGNATOR 'LT'
(SOT-89/TO-243AA)
Dimensions in Inches
(for reference only)
0.181
0.173
0.072
0.064
0.167
0.155
2
1
Dimensions in Millimeters
(controlling dimensions)
0.063
0.055
3
0.102
0.090
4.60
4.40
1.83
1.62
0.0173
0.0138
0.090
0.084
4.25
3.94
0.0189
0.0142
0.0221
0.0173
0.047
0.035
0.059
BSC
2
1
3.00
BSC
Dwg. MA-009-3A in
Dwg. MA-009-3A mm
2.5
2.0
B
0.031
A
0.102
0.8
2.6
A
4.6
0.181
1
2
2.29
2.13
0.56
0.44
1.50
0.098
0.079
B
0.44
0.35
0.48
0.36
BSC
BSC
2.60
2.29
3
1.20
0.89
0.118
1.60
1.40
3 0.047
1
2
3
1.2
0.028
0.031
0.7
0.8
TYP
TYP
TYP
TYP
ads 1, 2, 3, and A — Standard SOT-89 Layout
ads 1, 2, 3, and B — Low-Stress Version
ads 1, 2, and 3 only — Lowest Stress, But Not Self Aligning
Pads 1, 2, 3, and A — Standard SOT-89 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 in
Dwg. MA-012-3 mm
NOTE: Exact body and lead configuration at vendor’s option within limits shown.
www.allegromicro.com
9
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
PACKAGE DESIGNATOR 'UA'
Dimensions in Millimeters
(for reference only)
Dimensions in Inches
(controlling dimensions)
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
0.640
0.600
0.0173
0.0138
0.0189
0.0142
SEE NOTE
0.44
0.35
16.26
15.24
0.48
0.36
SEE NOTE
0.050
BSC
1.27
BSC
Dwg. MH-014E in
Dwg. MH-014E mm
Surface-Mount Lead Form (order A336xEUA-TL)
2.41
0.095
±0.13
±0.005
0.002
0.051
MAX
MAX
0.004 0°–8°
MAX
0.10
0.020
MIN
FLAT
MAX
Dwg. MH-015 in
0°–8°
0.51
MIN
FLAT
Dwg. MH-015 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. Recommended minimum PWB hole diameter to clear transition area is 0.035” (0.89 mm).
5. Where no tolerance is specified, dimension is nominal.
10
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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 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
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
HALL-EFFECT SENSORS
Partial Part
Number
Avail. Oper.
Characteristics at TA = +25°C
Temp.
BOP max
BRP min
Bhys typ
Features
HALL-EFFECT UNIPOLAR & OMNIPOLAR SWITCHES in order of BOP and Bhys
3240
3209
3210
3361
3362
3161
3141
3235
E/L
E
E
E
E
E
E/L
S
5140
3142
3143
3144
3122
3123
3121
E
E/L
E/L
E/L
E/L
E/L
E/L
+50
±60
±60
+110
+110
+160
+160
+175
-25
+200
+230
+340
+350
+400
+440
+450
+5.0
±5.0
±5.0
+55
+55
+30
+10
+25
-175
+50
+75
+165
+50
+140
+180
+125
10
7.7
7.7
5.0*
5.0*
20
55
15*
15*
55
55
55
55
105
105
105
Notes
chopper stabilized
1
400 µW, chopper stabilized
25 µW, chopper stabilized
2-wire, chopper stabilized, inverted output
2-wire, chopper stabilized
2-wire
output 1
output 2
300 mA power driver output
2
2
1
†
HALL-EFFECT LATCHES & BIPOLAR SWITCHES in order of BOP and Bhys
3260
E/L
+30
-30
20
bipolar switch, chopper stabilized
3280
E/L
+40
-40
45
chopper stabilized
3134
E/L
+50
-50
27
bipolar switch
3133
K/L/S
+75
-75
52
bipolar switch
3281
E/L
+90
-90
100
chopper stabilized
3132
K/L/S
+95
-95
52
bipolar switch
3187
E/L
+150
-150
100*
3177
S
+150
-150
200
3625
S
+150
-150
200
900 mA power driver output
1, 3
3626
S
+150
-150
200
400 mA power driver output
1, 3
3195
E/L
+160
-160
220
active pulldown
1
3197
L
+160
-160
230
1
3175
S
+170
-170
200
3188
E/L
+180
-180
200*
3283
E/L
+180
-180
300
chopper stabilized
3189
E/L
+230
-230
100*
3275
S
+250
-250
100*
3
3185
E/L
+270
-270
340*
Operating Temperature Ranges:
S = -20°C to +85°C, E = -40°C to +85°C, J = -40°C to +115°C, K = -40°C to +125°C, L = -40°C to +150°C
Notes 1. Protected.
2. Output 1 switches on south pole, output 2 switches on north pole for 2-phase, bifilar-wound, unipolar-driven brushless dc
motor control. Outputs may be tied together for omnipolar operation.
3. Complementary outputs for 2-phase bifilar-wound, unipolar-driven brushless dc motor control.
* Minimum. ‡ Maximum
† Latches will not switch on removal of magnetic field; bipolar switches may switch on removal of field but require field reversal
for reliable operation over operating temperature range.
12
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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