A3122ELT [SANKEN]
Analog Circuit, 1 Func, PSSO3, MINIATURE, TO-243AA, SOT-89, 3 PIN;
| 型号： | A3122ELT |
| 厂家： | 
SANKEN ELECTRIC |
| 描述： | Analog Circuit, 1 Func, PSSO3, MINIATURE, TO-243AA, SOT-89, 3 PIN |
| 文件： | 总8页 (文件大小：139K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
3121, 3122, AND
3123
HALL-EFFECT SWITCHES
FOR HIGH-TEMPERATURE OPERATION
These Hall-effect switches are monolithic integrated circuits with
tighter magnetic specifications, designed to operate continuously over
extended temperatures to +150°C, and are more stable with both tem-
perature and supply voltage changes. The unipolar switching character-
istic makes these devices ideal for use with a simple bar or rod magnet.
The three basic devices (3121, 3122, and 3123) are identical except for
magnetic switch points.
Each device includes a voltage regulator for operation with supply
voltages of 4.5 voltas to 24 volts, reverse battery protection diode,
quadratic Hall-voltage generator, temperature compensation circuitry,
small-signal amplifier, Schmitt trigger, and an open-collector output to
sink up to 25 mA. With suitable output pull up, they can be used with
bipolar or CMOS logic circuits. The 3121 is an improved replacement
for the 3113 and 3119.
V
CC
1
2
3
The first character of the part number suffix determines the device
operating temperature range. Suffix ‘E–’ is for the automotive and
industrial temperature range of -40°C to +85°C. Suffix ‘L–’ is for the
automotive and military temperature range of -40°C to +150°C. Three
package styles provide a magnetically optimized package for most
applications. Suffix ‘–LT’ is a miniature SOT-89/TO-243AA transistor
package for surface-mount applications; suffix ‘–U’ is a three-lead
plastic mini-SIP while suffix ‘–UA’ is a three-lead ultra-mini-SIP.
Dwg. PH-003A
Pinning is shown viewed from branded side.
FEATURES and BENEFITS
■ Superior Temp. Stability for Automotive or Industrial Applications
ABSOLUTE MAXIMUM RATINGS
■ 4.5 V to 24 V Operation … Needs Only An Unregulated Supply
■ Open-Collector 25 mA Output … Compatible with Digital Logic
■ Reverse Battery Protection
at T = +25°C
A
Supply Voltage, VCC ...........................30 V
Reverse Battery Voltage, VRCC ........ -30 V
Magnetic Flux Density, B ....... Unlimited
Output OFF Voltage, VOUT ................ 28 V
Reverse Output Voltage, VOUT ........ -0.5 V
Continuous Output Current, IOUT ... 25 mA
Operating Temperature Range, TA
■ Activate with Small, Commercially Available Permanent Magnets
■ Solid-State Reliability … No Moving Parts
■ Small Size
■ Resistant to Physical Stress
The A3121xU is not for new design.
The A3122xU and A3123xU are last-time buy.
Orders accepted until April 15, 2002.
Suffix ‘E–’ ................. -40°C to +85°C
Suffix ‘L–’ ............... -40°C to +150°C
Storage Temperature Range,
TS .............................. -65°C to +170°C
Always order by complete part number, e.g., A3121EU .
3121, 3122, AND 3123
HALL-EFFECT SWITCHES
FOR HIGH-TEMPERATURE
OPERATION
ELECTRICAL CHARACTERISTICS over operating temperature range, at VCC = 12 V.
Limits
Characteristic
Symbol
Test Conditions
Operating
Min.
Typ.
Max.
24
Units
V
Supply Voltage
VCC
4.5
Output Saturation Voltage
Output Leakage Current
Supply Current
VOUT(SAT)
IOUT = 20 mA, B > BOP
VOUT = 24 V, B < BRP
B < BRP (Output OFF)
RL = 820 Ω, CL = 20 pF
RL = 820 Ω, CL = 20 pF
140
<1.0
4.6
400
10
mV
µA
IOFF
ICC
tr
9.0
2.0
2.0
mA
µs
Output Rise Time
Output Fall Time
0.04
0.18
tf
µs
MAGNETIC CHARACTERISTICS in gauss over operating supply voltage range.
Part Numbers*
A3121
Typ.
350
A3122
Typ.
340
A3123
Typ.
345
Characteristic
Min.
250
220
125
80
Max.
450
500
380
410
140
150
Min.
280
260
140
120
70
Max.
400
430
330
360
140
140
Min.
250
230
180
160
70
Max
440
470
300
330
140
140
BOP at TA = 25°C
over operating temp. range
BRP at TA = 25°C
over operating temp. range
Bhys at TA = 25°C
over operating temp. range
350
340
345
245
235
240
245
235
240
70
105
105
105
60
105
70
105
70
105
NOTES: Typical values are at TA = +25°C and VCC = 12 V.
OP = operate point (output turns ON); BRP = release point (output turns OFF); Bhys = hysteresis (BOP - BRP).
B
*Complete part number includes a suffix to identify operating temperature range (E- or L-) and package type ( -LT, -U, or -UA).
FUNCTIONAL BLOCK DIAGRAM
1
V
CC
REG.
3
2
OUTPUT
GROUND
X
Dwg. FH-005-2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1992, 1999, Allegro MicroSystems, Inc.
3121, 3122, AND 3123
HALL-EFFECT SWITCHES
FOR HIGH-TEMPERATURE
OPERATION
TYPICAL OPERATING CHARACTERISTICS
SWITCH POINTS
OUTPUT SATURATION VOLTAGE
400
300
200
I
= 20 mA
OUT
OPERATE POINT
V
= 4.5–24 V
CC
RELEASE POINT
V
= 12 V
CC
100
0
150
100
125
-50
-25
0
25
50
75
100
125
150
-50
-25
0
25
50
75
AMBIENT TEMPERATURE IN °C
AMBIENT TEMPERATURE IN °C
Dwg. GH-040
Dwg. GH-038
SUPPLY CURRENT
SUPPLY CURRENT
7.0
6.0
5.0
4.0
10
V
= 12 V
CC
8.0
6.0
4.0
B ≥ B
OP
B ≥ B
OP
B ≤ B
RP
T
= +25°C
2.0
0
A
B ≤ B
RP
125
150
100
-50
-25
0
25
50
75
0
5
10
15
20
25
AMBIENT TEMPERATURE IN °C
SUPPLY VOLTAGE IN VOLTS
Dwg. GH-041
Dwg. GH-039
* Complete part number includes a suffix denoting operating temperature range (E- or L-) and package type ( -LT, -U, or -UA).
www.allegromicro.com
3121, 3122, AND 3123
HALL-EFFECT SWITCHES
FOR HIGH-TEMPERATURE
OPERATION
OPERATION
SENSOR LOCATIONS
The output of these devices (pin 3) switches low when the mag-
netic field at the Hall sensor exceeds the operate point threshold (BOP).
At this point, the output voltage is VOUT(SAT). When the magnetic field
is reduced to below the release point threshold (BRP), the device output
goes high. The difference in the magnetic operate and release points is
called the hysteresis (Bhys) of the device. This built-in hysteresis allows
clean switching of the output even in the presence of external mechani-
cal vibration and electrical noise.
(±0.005" [0.13 mm] die placement)
Suffix “LT”
ACTIVE AREA DEPTH
0.0305"
0.089"
0.775 mm
2.26 mm
NOM
0.043"
1.09 mm
APPLICATIONS INFORMATION
A
Hall effect applications information is available in the “Hall-Effect
IC Applications Guide”, which can be found in the latest issue of
Allegro MicroSystems Data Book AMS-702.
1
2
3
Dwg. MH-008-2D
Suffix “U”
ACTIVE AREA DEPTH
0.0165"
0.42 mm
NOM
CHANGE IN OPERATE POINT
0.091"
2.31 mm
20
0.070"
1.78 mm
15
T
= +25°C
A
A
10
BRANDED
SURFACE
1
2
3
5.0
Dwg. MH-002-2C
0
Suffix “UA”
ACTIVE AREA DEPTH
0.0195"
0.082"
2.07 mm
-5.0
0.50 mm
NOM
0
5
10
15
20
25
SUPPLY VOLTAGE IN VOLTS
Dwg. GH-042
0.055"
1.38 mm
A
BRANDED
SURFACE
1
2
3
Dwg. MH-011-2D
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3121, 3122, AND 3123
HALL-EFFECT SWITCHES
FOR HIGH-TEMPERATURE
OPERATION
PACKAGE DESIGNATOR ‘LT’
Dimensions in Inches
(for reference only)
0.181
0.173
0.072
0.064
0.063
0.055
0.0173
0.0138
0.102
0.090
0.090
0.084
0.167
0.155
2
3
1
0.0189
0.0142
0.0221
0.0173
0.047
0.035
0.059
BSC
0.118
BSC
Dwg. MA-009-3A in
Dimensions in Millimeters
(controlling dimensions)
4.60
4.40
1.83
1.62
1.60
1.40
0.44
0.35
2.60
2.29
2.29
2.13
4.25
3.94
2
3
1
0.48
0.36
1.20
0.89
0.56
0.44
1.50
BSC
3.00
BSC
Dwg. MA-009-3A mm
NOTE: Exact body and lead configuration at vendor's option within limits shown.
www.allegromicro.com
3121, 3122, AND 3123
HALL-EFFECT SWITCHES
FOR HIGH-TEMPERATURE
OPERATION
PACKAGE DESIGNATOR ‘U’
Dimensions in Inches
(controlling dimensions)
Dimensions in Millimeters
(for reference only)
0.183
0.178
4.65
4.52
0.063
0.059
1.60
1.50
0.181
0.176
4.60
4.47
45°
45°
0.018
0.46
0.086
2.18
1
2
3
1
2
3
MAX
MAX
0.0173
0.0138
15.24
14.23
0.44
0.35
0.600
0.560
0.0189
0.0142
0.48
0.36
SEE NOTE
SEE NOTE
0.050
0.100
1.27
2.54
Dwg. MH-003E in
Dwg. MH-003E mm
Devices in the ‘U’ package are
NOT RECOMMENDED FOR NEW DESIGN
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
3121, 3122, AND 3123
HALL-EFFECT SWITCHES
FOR HIGH-TEMPERATURE
OPERATION
PACKAGE DESIGNATOR ‘UA’
Dimensions in Inches
(controlling dimensions)
Dimensions in Millimeters
(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
2.16
1
2
3
1
2
3
MAX
MAX
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
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.
www.allegromicro.com
3121, 3122, AND 3123
HALL-EFFECT SWITCHES
FOR HIGH-TEMPERATURE
OPERATION
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 responsibil-
ity 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
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