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3421 の電気的特性と機能

3421のメーカーはAllegro MicroSystemsです、この部品の機能は「HALL-EFFECT/ DIRECTION-DETECTION SENSORS」です。


製品の詳細 ( Datasheet PDF )

部品番号 3421
部品説明 HALL-EFFECT/ DIRECTION-DETECTION SENSORS
メーカ Allegro MicroSystems
ロゴ Allegro MicroSystems ロゴ 




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3421 Datasheet, 3421 PDF,ピン配置, 機能
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 pdf, ピン配列
3421 AND 3422
HALL-EFFECT,
DIRECTION-DETECTION
SENSORS
ELECTRICAL CHARACTERISTICS over operating temperature range.
Characteristic
Supply Voltage Range
Output Leakage Current
Output Saturation Voltage
Power-On State
Under-Voltage Lockout
Under-Voltage Hysteresis
Power-On Time
Output Rise Time
Output Fall Time
Direction Change Delay
Supply Current
Symbol Test Conditions
VCC
IOFF
VOUT(SAT)
POS
VCC(UV)
VCC(hys)
tpo
tr
tf
td
Operating, TJ < 165°C1
VOUT = VCC = 18 V
IOUT = 20 mA
VCC = 0 5 V,
BRP1 < B < BOP1, BRP2 < B < BOP2
IOUT = 20 mA, VCC = 0 5 V
Lockout (VCC(UV)) - Shutdown
VCC > 4.5 V
CL = 20 pF, RL = 820
CL = 20 pF, RL = 820
CL = 20 pF, RL = 820
ICC VCC = 8 V, All outputs OFF
Min.
4.5
OFF
0.5
5.0
Limits
Typ. Max.
— 18
<1.0 10
0.21 0.50
OFF OFF
3.5 —
0.5 —
— 50
200 —
200 —
1.0 5.0
9.0 18
NOTES:1. Maximum supply voltage must be adjusted for power dissipation and ambient temperature.
2. Typical Data is at VCC = 12 V and TA = +25°C and is for design information only.
Units
V
µA
V
V
V
µs
ns
ns
µs
mA
0.6
0.5
0.4
0.3
RθJA = 164°C/W
0.2
0.1
0
25 50
75 100 125 150 175
TEMPERATURE IN °C
Dwg. GH-069
www.allegromicro.com


3Pages


3421 電子部品, 半導体
3421 AND 3422
HALL-EFFECT,
DIRECTION-DETECTION
SENSORS
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
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000

6 Page



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共有リンク

Link :


部品番号部品説明メーカ
3421

HALL-EFFECT/ DIRECTION-DETECTION SENSORS

Allegro MicroSystems
Allegro MicroSystems
3422

HIGH PERFORMANCE DUAL BIPOLAR OPERATINAL AMPLIFIER

Unisonic Technologies
Unisonic Technologies
3422

DIRECTION-DETECTION SENSORS

Allegro MicroSystems
Allegro MicroSystems
3425

DUAL/ CHOPPER-STABILIZED/ ULTRA-SENSITIVE/ BIPOLAR HALL-EFFECT SWITCH

Allegro MicroSystems
Allegro MicroSystems


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