3422 Datasheet PDF - Allegro MicroSystems
| Part Number | 3422 | |
| Description | DIRECTION-DETECTION SENSORS | |
| Manufacturers | Allegro MicroSystems | |
| Logo |  |
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3422
PRELIMINARY INFORMATION
HALL-EFFECT,
(subject to change without notice) DIRECTION-DETECTION SENSORS
Februaryt 21, 2003
E1 E2
XX
LOGIC
VCC
12 34 5
The A3422xKA Hall-effect, direction-detection sensor is a new
generation of special-function integrated sensors that is capable of
sensing the direction of rotation of a ring magnet. This transducer
provides separate digital outputs that provide information on magnet
rotation speed, direction, and magnet pole count. This device elimi-
nates the major manufacturing hurdles encountered in fine-pitch
direction-detection applications, namely maintaining accurate mechani-
cal location between the two active Hall elements. Here, the two Hall
elements are photolithographically aligned to better than 1 µm, as
contrasted with 100 µm or worse mechanical location tolerance when
manufactured discretely. This highly sensitive, temperature-stable,
magnetic transducer is ideal for use in digital-encoder systems in the
harsh environments of automotive or industrial applications. The
A3422xKA is a high-sensitivity device optimized for use with high-
density magnets.
Dwg. PH-015
Pinning is shown viewed from branded side.
The A3422xKA monolithic integrated circuit contains two indepen-
denwtwHw.DaatlalS-heeeft4fUe.ccomt latches whose digital outputs are internally coupled to
CMOS logic circuitry that decodes signal speed and direction. Ex-
tremely low-drift BiCMOS circuitry is used for the amplifiers to ensure
symmetry between the two latches so that signal quadrature can be
maintained. An on-chip voltage regulator allows the use of this device
from a 4.5 V to 18 V supply. The outputs are standard open-collector
outputs.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC . . . . . . . . . . . . . 18 V
Magnetic Flux Density, B . . . . Unlimited
Output OFF Voltage, VOUT . . . . . . . . VCC
Output Sink Current, IOUT . . . . . . . 30 mA
Package Power Dissipation,
PD . . . . . . . . . . . . . . . . . . . . . . 500 mW
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
Two operating temperature ranges are provided; 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. The 5-pin ‘KA’ SIP package provides a cost-
competitive solution to magnetic sensing in harsh environments.
FEATURES
s Internal Direction-Decoding Circuitry
s Two Matched Hall Latches On A Single Substrate
s Superior Temperature Stability
s 4.5 V to 18 V Operation
Electrically Defined Power-On State
Under-Voltage Lockout
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., A3422EKA .
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3422
HALL-EFFECT,
DIRECTION-DETECTION
SENSOR
Typical Electrical Characteristics
300
250 I OUT = 20 mA
200
150
100
50
0
-50
-25
0 25 50 75 100
AMBIENT TEMPERATURE IN °C
125 150
Dwg. GH-029-2
10
9.0
ALL OUTPUTS ON
8.0
7.0
VCC = 8 V
ALL OUTPUTS OFF
6.0
-50 -25 0
25 50 75 100 125 150
AMBIENT TEMPERATURE IN °C
Dwg. GH-053-1
13
12
11
10
9.0
8.0
7.0
6.0
5.0
2.0
TA = 25°C
ALL OUTPUTS ON
ALL OUTPUTS OFF
6.0 10 14
SUPPLY VOLTAGE IN VOLTS
18
Dwg. GH-058-3
www.allegromicro.com
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for 3422 electronic component. |
| Information | Total 10 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ 3422.PDF Datasheet ] | |
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