A3422LKA Datasheet PDF - Allegro MicroSystems
| Part Number | A3422LKA | |
| Description | HALL-EFFECT/ DIRECTION-DETECTION SENSORS | |
| Manufacturers | Allegro MicroSystems | |
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3421 AND
3422
PRELIMINARY INFORMATION
(subject to change without notice)
September 6, 2000
E1 E2
XX
LOGIC
VCC
12 34 5
HALL-EFFECT,
DIRECTION-DETECTION SENSORS
The A3421xKA and A3422xKA Hall-effect, direction-detection
sensors are a new generation of special-function integrated sensors that
are capable of sensing the direction of rotation of a ring magnet. These
transducers provide separate digital outputs that provide information on
magnet rotation speed, direction, and magnet pole count. These devices
eliminate 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. These highly sensitive, temperature-stable,
magnetic transducers are ideal for use in digital-encoder systems in the
harsh environments of automotive or industrial applications. The
A3421xKA is a high-hysteresis device designed for low-resolution
pulse counting while 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 A3421xKA and A3422xKA monolithic integrated circuits
contain two independent Hall-effect latches whose digital outputs are
internally coupled to CMOS logic circuitry that decodes signal speed
and direction. Extremely 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 these devices from a 4.5 V to 18 V supply. Both devices have
standard open-collector outputs; the logic operation of both devices is
the same.
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 ‘EKA’ . . . . . . . -40˚C to +85˚C
Suffix ‘LKA’ . . . . . . -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-com-
petitive solution to linear magnetic sensing in harsh environments.
FEATURES
I Internal Direction-Decoding Circuitry
I Two Matched Hall Latches On A Single Substrate
I Superior Temperature Stability
I 4.5 V to 18 V Operation
Electrically Defined Power-On State
Under-Voltage Lockout
Always order by complete part number, e.g., A3421EKA .
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3421 AND 3422
HALL-EFFECT,
DIRECTION-DETECTION
SENSORS
TYPICAL A3421xKA CHARACTERISTICS
250
200
150
100
50
0
-50
-100
-150
-200
-250
-50
VCC = 8 V
OPERATE POINT
RELEASE POINT
-25 0 25 50 75 100 125 150
AMBIENT TEMPERATURE IN °C
Dwg. GH-026-2
500
400 VCC = 8 V
300
200
100
0
-50 -25 0
25 50
75 100 125 150
AMBIENT TEMPERATURE IN °C
Dwg. GH-051-2
TYPICAL A3422xKA CHARACTERISTICS
50
40
30
20
10
0
-10
-20
-30
-40
-50
-50
VCC = 8 V
OPERATE POINT
RELEASE POINT
-25 0 25 50 75 100 125 150
AMBIENT TEMPERATURE IN °C
Dwg. GH-026-1
100
80 VCC = 8 V
60
40
20
0
-50 -25 0
25 50
75 100 125 150
AMBIENT TEMPERATURE IN °C
Dwg. GH-051-1
www.allegromicro.com
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for A3422LKA electronic component. |
| Information | Total 12 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ A3422LKA.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| A3422LKA | The function is HALL-EFFECT/ DIRECTION-DETECTION SENSORS. Allegro MicroSystems | |
| A3422LKA | The function is DUAL/ CHOPPER-STABILIZED/ ULTRA-SENSITIVE/ BIPOLAR HALL-EFFECT SWITCH. Allegro MicroSystems | |
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