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PDF 3421 Data sheet ( Hoja de datos )
| Número de pieza | 3421 | |
| Descripción | HALL-EFFECT/ DIRECTION-DETECTION SENSORS | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de 3421 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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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 .
1 page  
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
5 Page 
3421 AND 3422
HALL-EFFECT,
DIRECTION-DETECTION
SENSORS
HALL-EFFECT SENSORS
Partial Part Avail. Oper.
Characteristics at TA = +25°C
Number
Temp.
BOP max BRP min Bhys typ
Features
RATIOMETRIC, LINEAR HALL-EFFECT SENSORS
3503
3507
3508
3515
3516
3517
3518
3060
3422
3059
3056
3058
3421
S typ. 1.3 mV/G
E/L typ. 2.5 mV/G
S typ. 2.5 mV/G
E/L
typ. 5.0 mV/G
chopper stabilized
E/L
typ. 2.5 mV/G
chopper stabilized
L/S
typ. 5.0 mV/G
chopper stabilized
L/S
typ. 2.5 mV/G
chopper stabilized
GEARTOOTH/RING MAGNET (DUAL ELEMENT) HALL-EFFECT SENSORS in order of BOP
K/S
+35 -35
30 ac coupled
E/L
+75 -75
46 direction detection
K/S
+100
-100
130 ac coupled
E/L
+150
-150
50
zero-speed
E/L
+250
-250
200
zero-speed
E/L
+280
-280
335 direction detection
SPECIAL-PURPOSE HALL-EFFECT SENSORS
3054
3209
3210
3421
3422
3425
K/S
E
E
E/L
E/L
L
+300
±60
±60
+280
+85
+24
+5.0
±5.0
±5.0
-280
-85
-24
50 unipolar switch, multiplexed
7.7 400 µW, chopper stabilized
7.7 25 µW, chopper stabilized
335 direction detection
46 direction detection
19 dual, chopper stabilized
Operating Temperature Ranges:
S = -20°C to +85°C, E = -40°C to +85°C, J = -40°C to +115°C, K = -40°C to +125°C, L = -40°C to +150°C
Notes 1. Protected.
4. Multiplexed two-wire sensor; after proper address, power/signal bus current indicates magnetic field condition.
Notes
4
1
www.allegromicro.com
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet 3421.PDF ] | |
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