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PDF A3281UA Data sheet ( Hoja de datos )
| Número de pieza | A3281UA | |
| Descripción | CHOPPER-STABILIZED/ PRECISION HALL-EFFECT LATCHES | |
| Fabricantes | Allegro MicroSystems | |
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3280, 3281,
AND 3283
Suffix '–LT' & '–UA' Pinning
PTCT
V
CC
12
3
Dwg. PH-003-2
Pinning is shown viewed from branded side.
CHOPPER-STABILIZED, PRECISION
HALL-EFFECT LATCHES
The A3280--, A3281--, and A3283-- Hall-effect latches are ex-
tremely 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 dynamic offset
cancellation, which reduces the residual offset voltage normally caused
by device overmolding, temperature dependencies, and thermal stress.
The three devices are identical except for magnetic switch points.
Each device includes on a single silicon chip a voltage regulator,
Hall-voltage generator, small-signal amplifier, chopper stabilization,
Schmitt trigger, and a short-circuit protected open-collector output to
sink up to 25 mA. A south pole of sufficient strength will turn the
output on. A north pole is necessary to turn the output off. An on-board
regulator permits operation with supply voltages of 4.2 to 24 volts.
The first character of the part number suffix determines the device
operating temperature range; suffix ‘E–’ is for -40°C to +85°C and
‘L–’ is -40°C to +150°C. Three package styles provide a magnetically
optimized package for most applications. Suffix ‘–LH’ is a miniature
low-profile surface-mount package, ‘–LT’ is a miniature SOT-89/TO-
243AA transistor package for surface-mount applications; while suffix
‘–UA’ is a three-lead ultra-mini-SIP for through-hole mounting.
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Supply Voltage, VCC ........................ 26.5 V
Reverse Battery Voltage, VRCC .......... -30 V
Magnetic Flux Density, B ........... Unlimited
Output Off Voltage, VOUT ................... 26 V
Continuous Output Current,
IOUT ....................... Internally Limited
Reverse Output Current, IOUT ........ -50 mA
Package Power Dissipation, PD . See Graph
Junction Temperature, TJ ............... +170°C
Operating Temperature Range, TA
Suffix ‘E–’.................. -40°C to +85°C
Suffix ‘L–’................ -40°C to +150°C
Storage Temperature Range,
TS .............................. -65°C to +170°C
FEATURES
I Symmetrical Switch Points
I Resistant to Physical Stress
I Superior Temperature Stability
I Output Short-Circuit Protection
I Operation From Unregulated Supply
I Reverse Battery Protection
I Solid-State Reliability
I Small Size
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., A3281ELH .
1 page  
3280, 3281, AND 3283
CHOPPER-STABILIZED,
PRECISION
HALL-EFFECT LATCHES
TYPICAL OPERATING CHARACTERISTICS
as a function of temperature (cont'd)
OUTPUT SATURATION VOLTAGE
300
SUPPLY CURRENT
6.0
200
IOUT = 20 mA
VCC = 12 V
VCC = 12 V
5.0
4.0
OUTPUT ON, B > BOP
100
3.0
OUTPUT OFF, B < BRP
0
-50 -25
0 25 50 75 100
AMBIENT TEMPERATURE IN °C
125 150
Dwg. GH-029-4
2.0
-50
-25
0 25 50 75 100
AMBIENT TEMPERATURE IN °C
125 150
Dwg. GH-028-5
TYPICAL OPERATING CHARACTERISTICS
as a function of supply voltage
A3280* SWITCH POINTS
40
A3281* SWITCH POINTS
80
OPERATE POINT
20
OPERATE POINT
40
0
TA = 150°C
TA = -40°C
0
TA = 150°C
TA = -40°C
-20 RELEASE POINT
-40
RELEASE POINT
-40
3.0
3.5 4.0 4.5 5.0
SUPPLY VOLTAGE IN VOLTS
24
Dwg. GH-021-3
-80
3.0
3.5 4.0 4.5 5.0
SUPPLY VOLTAGE IN VOLTS
24
Dwg. GH-021-1
* Complete part number includes a suffix denoting operating temperature range (E or L) and package type (LH, LT, or UA).
www.allegromicro.com
5
5 Page 
3280, 3281, AND 3283
CHOPPER-STABILIZED,
PRECISION
HALL-EFFECT LATCHES
PACKAGE DESIGNATOR ‘UA’
Dimensions in Inches
(controlling dimensions)
0.164
0.159
0.062
45° 0.058
Dimensions in Millimeters
(for reference only)
4.17
4.04
1.57
45° 1.47
0.122
0.117
0.085 1 2 3 0.031
MAX
0.640
0.600
45°
0.0173
0.0138
3.10
2.97
2.16 1 2 3 0.79
MAX
16.26
15.24
45°
0.44
0.35
SEE NOTE
0.0189
0.0142
SEE NOTE
0.48
0.36
0.050
BSC
Dwg. MH-014E in
1.27
BSC
Surface-Mount Lead Form (order A328xxUA-TL)
0.095
±0.005
2.41
±0.13
Dwg. MH-014E mm
0.002
MAX
0.051
MAX
0.004 0°–8°
MAX
0.020
MIN
FLAT
Dwg. MH-015 in
0.10 0°–8°
MAX
0.51
MIN
FLAT
NOTES: 1.
2.
3.
4.
5.
6.
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.
Recommended minimum PWB hole diameter to clear transition area is 0.035" (0.89 mm).
Where no tolerance is specified, dimension is nominal.
Supplied in bulk pack (500 pieces per bag).
Dwg. MH-015 mm
www.allegromicro.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet A3281UA.PDF ] | |
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