A3185X [ALLEGRO]
HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE OPERATION; 霍尔效应锁存器高温作业
| 型号： | A3185X |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE OPERATION |
| 文件： | 总8页 (文件大小：150K) |
| 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 SOT89/
TO-243AA transistor package for surface-mount applications; suffix ‘–UA’ is
a three-lead ultra-mini-SIP.
Dwg. PH-003A
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
FEATURES
at T = +25°C
A
■ Symmetrical Switch Points
■ Superior Temperature Stability
■ Operation From Unregulated Supply
■ Open-Collector 25 mA Output
■ Reverse Battery Protection
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
■ Activate With Small, Commercially Available Permanent Magnets
■ Solid-State Reliability
■ Small Size
Suffix ‘E–’................... -40°C to +85°C
Suffix ‘L–’................. -40°C to +150°C
Storage Temperature Range,
■ Resistant to Physical Stress
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
Min.
3.8
—
Typ.
—
Max.
24
Units
V
Supply Voltage
Operating
Output Saturation Voltage
Output Leakage Current
Supply Current
VOUT(SAT)
IOFF
IOUT = 20 mA, B > BOP
VOUT = 24 V, B < BRP
B < BRP (Output OFF)
B > BOP (Output ON)
RL = 820 Ω, CL = 20 pF
RL = 820 Ω, CL = 20 pF
175
0.05
4.75
5.7
400
5.0
8.0
—
mV
µA
—
ICC
—
mA
mA
ns
—
Output Rise Time
Output Fall Time
tr
tf
—
100
100
—
—
—
ns
MAGNETIC CHARACTERISTICS in gauss over operating supply voltage range.
Part Numbers*
A3185
Min.
A3187
Min.
A3188
Min.
A3189
Characteristic
Max.
270
Max.
150
175
-50
Max.
180
200
-100
-80
Min.
50
Max.
230
250
-50
BOP at TA = 25°C
170
140
-270
-300
340
280
50
50
100
80
over operating temp. range
BRP at TA = 25°C
300
50
-170
-140
540
-150
-175
100
100
-180
-200
200
160
-230
-250
100
100
over operating temp. range
-50
-50
B
hys at TA = 25°C
300
350
360
400
460
500
over operating temp. range
600
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 or UA).
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1995, 2002 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 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. Powering up in the absence of a magnetic field (less than BOP
and higher than BRP) will allow an indeterminate output state. The correct
state is warranted after the first excursion beyond BOP or BRP.
A
1
2
3
Dwg. MH-008-4C
Package Designators “UA”
V
BB
30 V
MAX
ACTIVE AREA DEPTH
0.0195"
0.50 mm
NOM
0.083"
2.10 mm
0.060"
1.51 mm
B
B
OP
RP
A
BRANDED
SURFACE
1
2
3
V
OUT(SAT)
0
-B
0
+B
FLUX DENSITY
Dwg. MH-011-4C
Dwg. GH-034-4
Although sensor location is accurate to three
sigma for a particular design, product improve-
ments may result in small changes to sensor
location.
The simplest form of magnet that will operate these devices is a ring
magnet, as shown below. Other methods of operation are possible.
Allegro
Dwg. A-11,899
APPLICATIONS INFORMATION
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 ‘LT’
(SOT89/TO-243AA)
Dimensions in Inches
(for reference only)
Dimensions in Millimeters
(controlling dimensions)
0.181
0.173
0.072
0.064
0.063
0.055
4.60
4.40
1.83
1.62
1.60
1.40
0.0173
0.0138
0.44
0.35
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
0.031
0.8
0.102
0.181
2.6
1.2
A
2
A
2
4.6
0.047
3
1
1
3
0.028
TYP
0.031
TYP
0.7
TYP
0.8
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 in
Dwg. MA-012-3 mm
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.
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
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 A318xxUA-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).
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3185 THRU 3189
HALL-EFFECT LATCHES
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. How-
ever, 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
3185 THRU 3189
HALL-EFFECT LATCHES
FOR HIGH-TEMPERATURE
OPERATION
HALL-EFFECT SENSORS
LATCHING HALL-EFFECT DIGITAL SWITCHES
Partial
Part
Operate
Point (G)
Release
Point (G)
Hysteresis
(G)
Replaces
and
Oper.
Number
Over Oper. Voltage & Temp. Range
Temp.
Packages
Comments
UGN3175
UGN3177
A3185x
A3187x
A3188x
A3189x
A3280x
A3281x
A3283x
15 to 180
25 to 150
140 to 300
50 to 175
80 to 200
50 to 250
5 to 40
-180 to -15
-150 to -25
-300 to -140
-175 to -50
-200 to -80
-250 to -50
-40 to -5
>80 (Typ 180)
>50 (Typ 180)
280 to 600
100 to 350
160 to 400
100 to 500
10 to 80
S
S
LT, UA
LT, UA
LT, UA
LT, UA
LT, UA
E/L
E/L
E/L
E/L
E/L
E/L
E/L
3077, 3175, 3177
LT, UA
3075, 3076
LH, LT, UA
LH, LT, UA
LH, LT, UA
chopper stabilized
chopper stabilized
chopper stabilized
15 to 90
100 to 180
-90 to -15
-180 to -100 <400 (Typ 300)
30 to 180
“PROTECTED” LATCHING HALL-EFFECT DIGITAL SWITCHES
Partial
Part
Operate
Point (G)
Release
Point (G)
Hysteresis
(G)
Oper.
Number
Over Oper. Voltage & Temp. Range
Temp.
Packages
Comments
A3195x
A3197x
40 to 200
40 to 200
-200 to -40 >110 (Typ 220)
-200 to -40 >110 (Typ 230)
E, L
E, L
U, LT
U, LT
active pulldown
open-collector output
Notes: 1) Typical data is at T = +25°C and nominal operating voltage.
A
2) “x” = Operating Temperature Range [suffix letter or (prefix)]: S (UGN) = -20°C to +85°C, E = -40°C to +85°C,
J = -40°C to +115°C, K (UGS) = -40°C to +125°C, L (UGL) = -40°C to +150°C.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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