Allegro ATS610LSC Datasheet
ATS610LSC
DYNAMIC, PEAK-DETECTING,
DIFFERENTIAL HALL-EFFECT
GEAR-TOOTH SENSOR
DYNAMIC, PEAK-DETECTING, DIFFERENTIAL
HALL-EFFECT GEAR-TOOTH SENSOR
1 = Supply
2 = Output
3 = Ground
PRELIMINARY INFORMATION
(subject to change without notice)
September 3, 1998
1
2
Dwg. AH-008
3
ATS610LSC
The ATS610LSC gear-tooth sensor is an optimized Hall IC plus
magnet subassembly that provides a user-friendly solution for digital
gear-tooth sensing applications. The subassembly combines in a
compact high-temperature plastic shell, a samarium-cobalt magnet, a pole
piece, a differential Hall-effect IC that has been optimized to the
magnetic circuit, and a voltage regulator. The sensor can be easily
used in conjunction with a wide variety of gear or target shapes and
sizes.
The ATS610LSC is designed to provide increased immunity to
false switching in applications that require the sensing of large-tooth
gears (e.g., crank angle or cam angle). The sensor subassembly is
ideal for use in gathering speed, position, and timing information using
gear-tooth-based configurations.
The gear-sensing technology used for this sensor plus magnet
subassembly is Hall-effect based. The sensor incorporates a
dual-element Hall IC that switches in response to differential magnetic
signals created by the ferrous target. The circuitry contains a patented
track-and-hold peak-detecting circuit to eliminate magnet and system
offset effects. This circuit has the ability to detect relatively fast changes,
such as those caused by gear wobble and eccentricities, and provides
stable operation at extremely low rotation speeds.
Data Sheet
27627.101
ABSOLUTE MAXIMUM RATINGS
over operating temperature range
Supply Voltage, VCC............................. 24 V
Reverse Supply Voltage,
V
(1 minute max.)................... -24 V
RCC
Output OFF Voltage, V
Reverse Output Voltage, V
Continuous Output Current, I
Package Power Dissipation,
P
........................................ See Graph
D
Operating Temperature Range,
T
............................... -40°C to +150°C
A
Storage Temperature, T
.................... 18 V
OUT
.......... -0.5 V
OUT
...... 25 mA
OUT
................ +170°C
S
FEATURES AND BENEFITS
■ Fully Optimized Differential Digital Gear-Tooth Sensor
■ Single-Chip Sensing IC for High Reliability
■ Extremely Low Timing Accuracy Drift with Temperature
■ Large Operating Air Gaps
■ Small Mechanical Size
■ Optimized Magnetic Circuit
■ Patented Peak-Detecting Filter:
<200 µs Power-On Time
<10 RPM Operation (single-tooth target)
Correct First-Edge Detection
■ Under-Voltage Lockout
■ Wide Operating Voltage Range
■ Defined Power-Up State
Always order by complete part number: ATS610LSC .
ATS610LSC
DYNAMIC, PEAK-DETECTING,
DIFFERENTIAL HALL-EFFECT
GEAR-TOOTH SENSOR
1200
1000
R
θJA
800
600
400
200
0
ALLOWABLE PACKAGE POWER DISSIPATION IN mW
40 80 120
60 100 140 18020
AMBIENT TEMPERATURE IN °C
= 119°C/W
160
Dwg. GH-065-2
REG
MAGNET
FUNCTIONAL BLOCK DIAGRAM
UVLO
X
E1
+
–
X
E2
POWER-ON
LOGIC
TRACK &
HOLD
SUPPLY
1
OUTPUT
2
+
–
3
GROUND
Dwg. FH-014-2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1998, Allegro MicroSystems, Inc.
ATS610LSC
DYNAMIC, PEAK-DETECTING,
DIFFERENTIAL HALL-EFFECT
GEAR-TOOTH SENSOR
ELECTRICAL CHARACTERISTICS over operating voltage and temperature range.
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Supply Voltage V
CC
Power-On State POS V
Under-Voltage Lockout V
Output Saturation Voltage V
Output Leakage Current I
Supply Current I
Power-On Delay t
Output Rise Time t
Output Fall Time t
NOTE: Typical data is at VCC = 12 V and TA = +25°C and is for design information only.
CC(UV)
OUT(SAT)
OFF
CC
on
r
f
Operating, TJ < 165°C 5.0 12 24 V
= 0 → 5 V HIGH HIGH HIGH –
CC
I
= 20 mA, VCC = 0 → 5 V – 4.0 – V
OUT
I
= 20 mA – 350 600 mV
OUT
V
= 18 V, Output OFF – 5.0 15 µA
OUT
VCC = 6 V, Output OFF 5.5 7.7 11 mA
V
= 6 V, Output ON 8.5 10.5 13 mA
CC
– – 200 µs
RL = 500 Ω, CL = 10 pF – 0.2 2.0 µs
RL = 500 Ω, CL = 10 pF – 0.2 2.0 µs
OPERATION over operating voltage and temperature range with reference target (unless
otherwise specified).
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Air Gap Range AG Operating, 0.4 – 1.5 mm
Target Speed > 20 RPM
Minimum Air Gap AG
min
Operating, One-Tooth (180°) – 0.25 – mm
Target, Target Speed = 1000 RPM
Maximum Air Gap AG
max
Operating, One-Tooth (180°) – 2.25 – mm
Target, Target Speed = 1000 RPM
Timing Accuracy t
θ
Target Speed = 1000 RPM, – ±0.5 ±1.0 °
0.4 mm ≤ AG ≤ 1.5 mm
NOTE: Air Gap is defined as the distance from the face of the sensor subassembly to the target.
ATS610LSC
DYNAMIC, PEAK-DETECTING,
DIFFERENTIAL HALL-EFFECT
GEAR-TOOTH SENSOR
D = 115 mm
o
TARGET
t
h = 5 mm
T = 3 mm
F (THICKNESS) ≥ 3 mm
SENSOR
POLE PIECE
SOUTH
PERMANENT
MAGNET
NORTH
1 2 3
TARGET
D = 115 mm
o
AIR GAP
Dwg. MH-022 mm
3 mm
REFERENCE TARGET
T = 180°
(ONE TOOTH)
F (THICKNESS) ≥ 3 mm
E1 E2
SENSOR
POLE PIECE
SOUTH
PERMANENT
MAGNET
NORTH
1 2 3
t
h = 5 mm
AIR GAP
Dwg. MH-022-1 mm
ONE-TOOTH (180
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
°) TARGET
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