A3185LU [SANKEN]
Analog Circuit, 1 Func, PSIP3, MINI, PLASTIC, SIP-3;
| 型号： | A3185LU |
| 厂家： | 
SANKEN ELECTRIC |
| 描述： | Analog Circuit, 1 Func, PSIP3, MINI, PLASTIC, SIP-3 |
| 文件： | 总8页 (文件大小：172K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
3185
3189 THRU
HALL-EFFECT LATCHES
FOR HIGH-TEMPERATURE OPERATION
These Hall-effect latches are extremely temperature-stable and stress-
resistant sensors especially suited for operation over extended temperature
ranges to +150°C. Superior high-temperature performance is made possible
through a novel Schmitt trigger circuit that maintains operate and release
point symmetry by compensating for temperature changes in the Hall ele-
ment. Additionally, internal compensation provides magnetic switch points
that become more sensitive with temperature, hence offsetting the usual
degradation of the magnetic field with temperature. The symmetry capability
makes these devices ideal for use in pulse-counting applications where duty
cycle is an important parameter. The four basic devices (3185, 3187, 3188,
and 3189) are identical except for magnetic switch points.
V
CC
Each device includes on a single silicon chip a voltage regulator, qua-
dratic Hall-voltage generator, temperature compensation circuit, signal
amplifier, Schmitt trigger, and a buffered open-collector output to sink up to
25 mA. The on-board regulator permits operation with supply voltages of 3.8
to 24 volts.
1
2
3
The first character of the part number suffix determines the device
operating temperature range. Suffix ‘E–’ is for -40°C to +85°C, and suffix
‘L–’ is for -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
■ Symmetrical Switch Points
ABSOLUTE MAXIMUM RATINGS
■ Superior Temperature Stability
■ Operation From Unregulated Supply
■ Open-Collector 25 mA Output
■ 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 .................. 30 V
Reverse Output Voltage, VOUT .......... -0.5 V
Continuous Output Current, IOUT ..... 25 mA
Operating Temperature Range, TA
Suffix ‘E–’................... -40°C to +85°C
Suffix ‘L–’................. -40°C to +150°C
Storage Temperature Range,
■ Activate With Small, Commercially Available Permanent Magnets
■ Solid-State Reliability
■ Small Size
■ Resistant to Physical Stress
The A3187xU is not for new design. The A3185xU,
A3188xU, and A3189xU are last-time buy.
Orders accepted until April 15, 2002.
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., A3185ELT .
TS ............................... -65°C to +170°C
3185 THRU 3189
HALL-EFFECT LATCHES
FOR HIGH-TEMPERATURE
OPERATION
FUNCTIONAL BLOCK DIAGRAM
1
V
CC
REG.
3
OUTPUT
GROUND
X
2
Dwg. FH-005-3
ELECTRICAL CHARACTERISTICS over operating temperature range, at VCC = 12 V.
Limits
Characteristic
Symbol
VCC
Test Conditions
Operating
Min.
Typ.
Max.
24
Units
V
Supply Voltage
3.8
Output Saturation Voltage
Output Leakage Current
Supply Current
VOUT(SAT)
IOFF
IOUT = 20 mA, B > BOP
VOUT = 24 V, B < BRP
175
400
5.0
mV
µA
0.05
ICC
B < BRP
(Output
OFF)
4.75
8.0mA
B > BOP (Output ON)
RL = 820 Ω, CL = 20 pF
RL = 820 Ω, CL = 20 pF
5.7
100
100
mA
ns
Output Rise Time
Output Fall Time
tr
tf
ns
MAGNETIC CHARACTERISTICS in gauss over operating supply voltage range.
Part Numbers*
A3185
Min.
A3187
Min.
A3188
A3189
Characteristic
Max.
Max.
Min.
Max.
Min.
Max.
BOP at TA = 25°C
170270
range
50 15018010 50230
01403500 175
over
operating
temp.
0802050250
BRP at TA = 25°C
over operating temp. range
-270-170 -150 -50
-1080-10-230-50
-300
340
280
-140
540
600
-175
100
100
-50
300
350
-200
200
160
-80
360
400
-250
100
100
-50
460
500
B
hys at TA = 25°C
over operating temp. range
NOTES: BOP = operate point (output turns ON); BRP = release point (output turns OFF); Bhys = hysteresis (BOP - BRP).
As used here, negative flux densities are defined as less than zero (algebraic convention).
*Complete part number includes a suffix to identify operating temperature range (E or L) and package type ( LT, U, or UA).
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1995, 1999, Allegro MicroSystems, Inc.
3185 THRU 3189
HALL-EFFECT LATCHES
FOR HIGH-TEMPERATURE
OPERATION
TYPICAL OPERATING CHARACTERISTICS
A3185* SWITCH POINTS
A3187* SWITCH POINTS
300
200
100
0
150
100
50
OPERATE POINT
OPERATE POINT
V
= 12 V
V
= 12 V
CC
CC
0
-50
-100
RELEASE POINT
RELEASE POINT
-100
-150
-200
-300
-50
-25
0
25
50
75
100
125
150
-50
-25
0
25
50
75
100
125
150
AMBIENT TEMPERATURE IN °C
AMBIENT TEMPERATURE IN °C
Dwg. GH-027
Dwg. GH-026
SUPPLY CURRENT
OUTPUT SATURATION VOLTAGE
7.0
6.0
300
I
= 20 mA
OUT
V
= 12 V
CC
V
= 4.5–24 V
CC
200
B ≥ B
OP
5.0
4.0
100
B ≤ B
RP
0
-50
150
150
100
125
125
-25
0
25
50
75
100
-50
-25
0
25
50
75
AMBIENT TEMPERATURE IN °C
AMBIENT TEMPERATURE IN °C
Dwg. GH-028
Dwg. GH-029
OPERATE POINT
SUPPLY CURRENT
10
20
15
8.0
6.0
4.0
T
= +25°C
A
B ≥ B
OP
10
B ≤ B
RP
5.0
T
= +25°C
2.0
0
0
A
-5.0
0
5
10
15
20
25
0
5
10
15
20
25
SUPPLY VOLTAGE IN VOLTS
SUPPLY VOLTAGE IN VOLTS
Dwg. GH-030
Dwg. GH-037
* Complete part number includes a suffix denoting operating temperature range (E or L) and package type (LT, U, or UA).
www.allegromicro.com
3185 THRU 3189
HALL-EFFECT LATCHES
FOR HIGH-TEMPERATURE
OPERATION
SENSOR LOCATIONS
(±0.005 [0.13 mm] die placement)
OPERATION
In operation, the output transistor is OFF until the strength of the mag-
netic field perpendicular to the surface of the chip exceeds the threshold or
operate point (BOP). When the field strength exceeds BOP, the output transis-
tor switches ON and is capable of sinking 25 mA of current.
Package Designators “LT”
ACTIVE AREA DEPTH
0.0305"
0.090"
The output transistor switches OFF when magnetic field reversal results
in a magnetic flux density below the OFF threshold (BRP). This is illustrated
in the transfer characteristics graph (A3187* shown).
0.775 mm
2.27 mm
NOM
0.050"
1.27 mm
Note that the device latches; that is, a south pole of sufficient strength
will turn the device ON. Removal of the south pole will leave the device ON.
The presence of a north pole of sufficient strength is required to turn the
device OFF.
A
1
2
3
Dwg. MH-008-4C
V
Package Designator “U”
BB
30 V
MAX
ACTIVE AREA DEPTH
0.0165"
0.42 mm
NOM
0.092"
2.33 mm
0.077"
1.96 mm
B
B
OP
RP
A
V
OUT(SAT)
BRANDED
SURFACE
0
1
2
3
-B
0
+B
FLUX DENSITY
Dwg. GH-034-4
Dwg. MH-002-7C
The simplest form of magnet that will operate these devices is a ring
magnet, as shown below. Other methods of operation are possible.
Package Designators “UA” and "UA-TL"
ACTIVE AREA DEPTH
0.0195"
0.083"
0.50 mm
2.10 mm
NOM
0.060"
1.51 mm
A
BRANDED
SURFACE
1
2
3
Dwg. A-11,899
Dwg. MH-011-4C
APPLICATIONS INFORMATION
Although sensor location is accurate to three
sigma for a particular design, product improve-
ments may result in small changes to sensor
location.
Extensive applications information on magnets and Hall-effect sensors is
also available in the Allegro Integrated and Discrete Semiconductors Data
Book or Application Note 27701.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3185 THRU 3189
HALL-EFFECT LATCHES
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
MAX
1
2
3
2.18
MAX
1
2
3
0.0173
0.0138
0.600
0.560
15.24
14.23
0.44
0.35
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.
6. Minimum lead length was 0.500" (12.70 mm). If existing product to the original specifications is not acceptable,
contact sales office before ordering.
www.allegromicro.com
3185 THRU 3189
HALL-EFFECT LATCHES
FOR HIGH-TEMPERATURE
OPERATION
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 (Suffix ‘-TL’)
0.095
±0.005
2.41
±0.13
0.002
MAX
0.051
MAX
0°–8°
0°–8°
0.51
MAX
0.004
MAX
0.10
0.020
MIN
FLAT
MIN
FLAT
Dwg. MH-015 in
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.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3185 THRU 3189
HALL-EFFECT LATCHES
FOR HIGH-TEMPERATURE
OPERATION
PACKAGE DESIGNATOR ‘LT’
(SOT-89/TO-243AA)
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
3185 THRU 3189
HALL-EFFECT LATCHES
FOR HIGH-TEMPERATURE
OPERATION
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 design of its products.
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 which may result from its use.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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