파트넘버.co.kr A3046 데이터시트 PDF


A3046 반도체 회로 부품 판매점

HALL EFFECT GEAR-TOOTH SENSORS ZERO SPEED



Allegro MicroSystems 로고
Allegro MicroSystems
A3046 데이터시트, 핀배열, 회로
3046, 3056, AND
3058
HALL EFFECT GEAR-TOOTH SENSORS
–ZERO SPEED
XX
V
CC
12
3
Dwg. PH-012
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC . . . . . . . . . . . . . . 28 V
Reverse Battery Voltage,
VRCC . . . . . . . . . . . . . . . . . . . . . . -30 V
Magnetic Flux Density, B . . . . . Unlimited
Output OFF Voltage, VOUT . . . . . . . . . 28 V
Reverse Output Voltage, VOUT . . . . . -0.5 V
Output Current, IOUT . . . . . . . . . . . . 25 mA
Package Power Dissipation, PD . . 500 mW
Operating Temperature Range, TA
Suffix “EU” . . . . . . . . . -40°C to +85°C
Suffix “LU” . . . . . . . . -40°C to +150°C
Storage Temperature Range,
TS . . . . . . . . . . . . . . . -65°C to +170°C
The A3046EU/LU, A3056EU/LU, and A3058EU/LU Hall effect
gear-tooth sensors are monolithic integrated circuits that switch in
response to differential magnetic fields created by ferrous targets.
These devices are ideal for use in gear-tooth-based speed, position,
and timing applications and operate down to zero rpm over a wide
range of air gaps and temperatures. When combined with a back-
biasing magnet and proper assembly techniques, devices can be
configured to give 50% duty cycle or to switch on either leading,
trailing, or both edges of a passing gear tooth or slot.
The six devices differ only in their magnetic switching values and
operating temperature ranges. The low hysteresis of the A3046/56EU
and A3046/56LU makes them perfectly suited for ABS (anti-lock brake
system) or speed sensing applications where maintaining large air
gaps is important. The A3046EU/LU features improved switch point
stability with temperature over the A3056EU/LU. The high hysteresis
of the A3058EU and A3058LU, with their excellent temperature
stability, makes them especially suited to ignition timing applications
where switch-point accuracy (and latching requirements) is extremely
important.
Continued next page...
BENEFITS
I Senses Ferrous Targets Down to Zero RPM
I Large Effective Air Gap
I Wide Operating Temperature Range
I Operation from Unregulated Supply
I High-Speed Operation
I Output Compatible With All Logic Families
I Reverse Battery Protection
I Solid-State Reliability
I Resistant to Physical Stress
SELECTION GUIDE
Operating Temp. Range
-40°C to +85°C
-40°C to +150°C
Switching Hysteresis
15-90 G
150-250 G
Device Type Number
A3046EU
A3056EU
A3058EU
A3046LU
A3056LU
A3058LU


A3046 데이터시트, 핀배열, 회로
3046, 3056, AND 3058
HALL EFFECT
GEAR-TOOTH SENSORS
–ZERO SPEED
All devices, when used with a back-
biasing magnet, can be configured to turn ON
or OFF with the leading or trailing edge of a
gear tooth or slot. Changes in fields on the
magnet face caused by a moving ferrous
mass are sensed by two integrated Hall
transducers and are differentially amplified by
on-chip electronics. The on-chip temperature
compensation and Schmitt trigger circuitry
minimizes shifts in effective working air gaps
and switch points over temperature making
these devices ideal for use in ignition timing,
anti-lock braking systems, and speed mea-
surement systems in hostile automotive and
industrial environments.
Each Hall effect digital Integrated circuit
includes two quadratic Hall effect sensing
elements, a voltage regulator, temperature
compensating circuitry, low-level amplifier,
Schmitt trigger, and an open-collector output
driver. The on-board regulator permits
operation with supply voltages of 4.5 to 24
volts. The output stage can switch up to 20
mA at conservatively specified repetition
rates to 20 kHz and is compatible with bipolar
and MOS logic circuits.
FUNCTIONAL BLOCK DIAGRAM
1 SUPPLY
REG
XX
+
OUTPUT
3
2
GROUND
Dwg. FH-010
Both magnetic characteristics are available in a choice of two operat-
ing temperature ranges. Suffix EU devices have an operating range of
-40°C to +85°C while suffix LU devices feature an operating range of
-40°C to +150°C. All devices are packaged in a 3-pin plastic SIP.
ELECTRICAL CHARACTERISTICS at VCC = 8 V, over operating temperature range.
Characteristic
Symbol
Test Conditions
Min.
Limits
Typ. Max.
Supply Voltage
Power-Up State
Output Saturation Voltage
Output Leakage Current
Supply Current
Output Rise time
Output Fall time
VCC
VOUT(SAT)
IOFF
ICC
tr
tf
Operating
3058* only,
VCC = 0 4.5 V, B < BOP
IOUT = 20 mA, B > BOP
VCC = VOUT = 24 V, B < BRP
VCC = 24 V, B < BRP
RL = 820 , CL = 20 pF
RL = 820 , CL = 20 pF
4.5 — 24
Output is OFF
— 135 400
— — 5.0
— 7.2 14
— 100 —
— 100 —
Units
V
mV
µA
mA
ns
ns
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1989, 1995 Allegro MicroSystems, Inc.




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A3046

HALL EFFECT GEAR-TOOTH SENSORS ZERO SPEED - Allegro MicroSystems



A3046EU

HALL EFFECT GEAR-TOOTH SENSORS ZERO SPEED - Allegro MicroSystems



A3046LU

HALL EFFECT GEAR-TOOTH SENSORS ZERO SPEED - Allegro MicroSystems