A3362X [ETC]
2-WIRE. CHOPPER-STABILIZED. HALL-EFFECT SWITCHES ; 2线。斩波稳定。霍尔效应开关\n
| 型号： | A3362X |
| 厂家： | 
ETC |
| 描述： | 2-WIRE. CHOPPER-STABILIZED. HALL-EFFECT SWITCHES
|
| 文件： | 总12页 (文件大小：193K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
3362 AND
3361
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
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 low-profile surface-
mount package, ‘xLT’ is a miniature SOT-89/TO-243AA transistor
package for surface-mount applications; while suffix ‘xUA’ is a three-
lead ultra-mini-SIP for through-hole mounting.
Dwg. PH-003-5
Pinning is shown viewed from branded side.
PRELIMINARY INFORMATION
(subject to change without notice)
August 28, 2000
FEATURES
I Internal Current Regulator for 2-Wire Operation
I Resistant to Physical Stress
I Superior Temperature Stability
I Operation From Unregulated Supply
I 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
Junction Temperature, TJ ............... +170°C
I Small Size
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
Dwg. FH-020-6
Suffix Code 'UA' Pinning
(SIP)
Suffix Code 'LT' Pinning
(SOT-89/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 © 2000, 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
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
700
600
500
400
300
SENSOR LOCATIONS
( 0.005” [0.13 mm] die placement)
Suffix "–UA"
RθJA = 206°C/W
Package Designator “LH”
Suffix "–LH"
ACTIVE AREA DEPTH
RθJA = 248°C/W
0.011"
0.059"
0.28 mm
1.49 mm
Suffix "–LT"
θJA = 258°C/W
NOM
3
R
0.038"
0.96 mm
200
100
0
A
1
2
Dwg. MH-025
Package Designator “LT”
20
40
60
80
100
120
140
160
180
AMBIENT TEMPERATURE in °C
Dwg. GH-046-4
ACTIVE AREA DEPTH
0.030"
0.76 mm
NOM
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"
0.080"
0.46 mm
2.04 mm
NOM
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.
Qualification Test
Test Method and Test Conditions
Test Length
50 hrs
Samples
Comments
Biased Humidity (HAST) TA = 130°C, RH = 85%
77
77
VCC = VOUT = 5 V
High-Temperature
Operating Life (HTOL)
JESD22-A108,
TA = 150°C, TJ = 165°C
408 hrs
VCC = 24 V,
VOUT = 20 V
Accelerated HTOL
JESD22-A108,
TA = 175°C, TJ = 190°C
504 hrs
96 hrs
77
77
77
77
6
VCC = 24 V,
VOUT = 20 V
Autoclave, Unbiased
JESD22-A102, Condition C,
TA = 121°C, 15 psig
High-Temperature
(Bake) Storage Life
MIL-STD-883, Method 1008,
TA = 170°C
1000 hrs
500 cycles
Temperature Cycle
MIL-STD-883, Method 1010,
-65°C to +150°C
Latch-Up
—
Pre/Post
Reading
Electro-Thermally
Induced Gate Leakage
—
Pre/Post
Reading
6
ESD,
Human Body Model
CDF-AEC-Q100-002
Per Specification
Pre/Post
Reading
x per
test
Test to failure,
All leads > TBD
Electrical Distributions
—
30
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
6
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.
Extensive applications information on magnets and Hall-
effect sensors is also available in the Allegro Electronic Data
Book AMS-702 or Application Note 27701 or
www.allegromicro.com
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.
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
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)
Dimensions in Millimeters
(controlling dimensions)
0.122
0.114
0.020
0.012
3.10
2.90
0.0079
0.0050
0.50
0.30
0.20
0.127
3
3
0.083
0.073
2.10
1.85
0.118
0.106
3.00
2.70
0.020 MIN
0.25 MIN
1
2
1
2
0.55
0.022
0° TO 8°
0° TO 8°
REF
REF
0.95
0.037
BSC
BSC
0.043
0.035
0.049
0.035
1.10
0.90
0.15
0.00
0.006
0.000
1.25
0.90
Dwg. MA-010-3B mm
Dwg. MA-010-3B 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.
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 'LT'
(SOT-89/TO-243AA)
Dimensions in Inches
(for reference only)
Dimensions in Millimeters
(controlling dimensions)
0.181
0.063
0.055
4.60
4.40
1.83
1.62
1.60
1.40
0.173
0.0173
0.0138
0.44
0.35
0.072
0.064
0.102
0.090
0.090
0.084
2.60
2.29
2.29
2.13
0.167
0.155
4.25
3.94
2
3
1
2
3
1
0.0189
0.0142
0.0221
0.0173
0.48
0.36
0.047
1.20
0.035
0.89
0.56
0.44
0.059
1.50
BSC
BSC
0.118
3.00
BSC
BSC
Dwg. MA-009-3A in
Dwg. MA-009-3A mm
2.5
2.0
0.098
0.079
B
B
0.8
0.031
2.6
1.2
0.102
0.181
A
A
2
4.6
0.047
3
1
2
3
1
0.7
0.8
0.028
0.031
TYP
TYP
TYP
TYP
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
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
Dwg. MA-012-3 mm
Dwg. MA-012-3 in
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
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
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
0.050
BSC
1.27
BSC
Dwg. MH-014E in
Dwg. MH-014E mm
Surface-Mount Lead Form (order A336xEUA-TL)
0.095
0.005
2.41
0.13
0.002
0.051
MAX
MAX
0°–8°
0°–8°
0.004
0.10
0.020
MIN
FLAT
0.51
MAX
MAX
MIN
Dwg. MH-015 in
Dwg. MH-015 mm
FLAT
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.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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.
www.allegromicro.com
11
3361 AND 3362
2-WIRE,
CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
HALL-EFFECT SENSORS
Partial Part Avail. Oper.
Characteristics at T = +25°C
A
Number
Temp.
B
max
B
min
B
typ
Features
Notes
OP
RP
hys
HALL-EFFECT UNIPOLAR & OMNIPOLAR SWITCHES in order of B
and B
hys
OP
3240
3209
3210
3361
3362
3161
3141
3235
E/L
E
+50
60
+5.0
5.0
10
7.7
7.7
5.0*
5.0*
20
chopper stabilized
1
400 µW, chopper stabilized
25 µW, chopper stabilized
E
60
5.0
E
+110
+110
+160
+160
+175
-25
+200
+230
+340
+350
+400
+440
+450
+55
+55
+30
+10
+25
-175
+50
+75
+165
+50
+140
+180
+125
2-wire, chopper stabilized, inverted output
2-wire, chopper stabilized
2-wire
E
E
E/L
S
55
15*
15*
55
output 1
output 2
300 mA power driver output
2
2
1
5140
3142
3143
3144
3122
3123
3121
E
E/L
E/L
E/L
E/L
E/L
E/L
55
55
55
105
105
105
†
HALL-EFFECT LATCHES & BIPOLAR SWITCHES in order of B
and B
hys
OP
3260
3280
3134
3133
3281
3132
3187
3177
3625
3626
3195
3197
3175
3188
3283
3189
3275
3185
E/L
E/L
E/L
K/L/S
E/L
K/L/S
E/L
S
+30
+40
-30
-40
20
45
bipolar switch, chopper stabilized
chopper stabilized
bipolar switch
+50
-50
27
+75
-75
52
100
52
bipolar switch
+90
-90
chopper stabilized
bipolar switch
+95
-95
+150
+150
+150
+150
+160
+160
+170
+180
+180
+230
+250
+270
-150
-150
-150
-150
-160
-160
-170
-180
-180
-230
-250
-270
100*
200
200
200
220
230
200
200*
300
100*
100*
340*
S
900 mA power driver output
400 mA power driver output
active pulldown
1, 3
1, 3
1
S
E/L
L
1
S
E/L
E/L
E/L
S
chopper stabilized
3
E/L
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.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
12
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