ATS535JSB [ALLEGRO]
ZERO-SPEED, SELF-CALIBRATING, NON-ORIENTED, HALL-EFFECT GEAR-TOOTH SENSOR; 零速，自校准，无取向，霍尔效应齿轮齿传感器
| 型号： | ATS535JSB |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | ZERO-SPEED, SELF-CALIBRATING, NON-ORIENTED, HALL-EFFECT GEAR-TOOTH SENSOR |
| 文件： | 总12页 (文件大小：77K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ATS632LSC
ZERO-SPEED, SELF-CALIBRATING,
NON-ORIENTED, HALL-EFFECT GEAR-TOOTH SENSOR
The ATS632LSC gear-tooth sensor is an optimized Hall-effect IC/
magnet combination that provides tooth/valley recognition and ex-
tremely accurate tooth edge detection when used with large-pitch
targets. The sensor subassembly consists of a high-temperature
plastic shell that holds together a compound samarium-cobalt magnet,
a single-element self-calibrating Hall-effect IC that has been optimized
to the magnetic circuit, and a voltage regulator. This small package,
with its non-oriented operation, can be easily assembled and used in
conjunction with a number of gear configurations.
The gear sensing technology used for this sensor subassembly is
Hall-effect based. The sensor incorporates a single-element Hall IC
that switches in response to absolute magnetic signals created by a
1 = Supply
2 = Output
3 = Ground
ferrous target. The digital output is LOW over a tooth and HIGH over a
valley. The sophisticated processing circuitry contains self-calibrating
6-bit A/D circuitry that adapts the thresholds to the peak-to-peak
signals to minimize the effects of variation in application air gap on
switch-point timing accuracy. The effects of system and device offsets
are minimized by using active offset cancellation circuitry. The digital
algorithm provides zero-speed detection capabilities without the
associated running jitter inherent in classical digital solutions.
3
2
1
Dwg. AH-008
PRELIMINARY INFORMATION
(subject to change without notice)
April 8, 1998
The sensor system is ideal for use in gathering speed, position and
profile information of ferrous objects. The device is particularly suited
to large tooth/valley sensing applications where accurate timing
accuracy is a desired feature. For applications requiring the sensing of
fine-pitch gears, the ATS611LSB is recommended.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC ......................... 24 V
Reverse Supply Voltage,
continued next page…
VRCC (1 minute max.)................ -24 V
Output OFF Voltage, VOUT ................ 24 V
Output Current, IOUT .. Internally Limited
Reverse Output Current, IOUT ........ 50 mA
Package Power Dissipation,
PD .................................... See Graph
Operating Temperature Range,
TA ........................... -40°C to +150°C
Storage Temperature, TS ............ +170°C
Always order by complete part number, e.g., ATS632LSC .
ATS632LSC
HALL-EFFECT
GEAR-TOOTH SENSOR
SUBASSEMBLY
1200
1000
FEATURES AND BENEFITS
■ Non-Oriented Installation
■ Fully Optimized Gear-Tooth Sensors
■ Single-Chip Sensing IC for High Reliability
RθJA = 119°C/W
800
600
400
200
■ Zero-Speed Digital Output Representing Target
Profile
■ Extremely Low Timing Accuracy Drift with Tempera-
ture
■ Large Operating Air Gaps
■ Optimized Magnetic Circuit
■ Self-Calibrating Circuitry
with Integrated Offset Cancellation
6-bit A/D Converters to Capture Peaks
Thresholds Proportional to Peak-to-Peak Signals
0
20
40
60
80
100
120
140
160
180
AMBIENT TEMPERATURE IN °C
Dwg. GH-065-2
FUNCTIONAL BLOCK DIAGRAM
SUPPLY
1
REG
MAGNET
X
100 Ω
GAIN
2
OUTPUT
–
+
THRESHOLD
PEAK
330 pF
CURRENT
LIMIT
OFFSET
POSITIVE PEAK
TRACK & HOLD
3
GROUND
NEGATIVE PEAK
TRACK & HOLD
Dwg. FH-015-3
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1998, Allegro MicroSystems, Inc.
ATS632LSC
HALL-EFFECT
GEAR-TOOTH SENSOR
SUBASSEMBLY
ELECTRICAL CHARACTERISTICS over operating voltage and temperature range (unless
otherwise specified).
Limits
Characteristic
Symbol
VCC
Test Conditions
Min.
6.0
–
Typ.
12
Max.
24
–
Units
V
Supply Voltage
Operating, TJ < 165°C
IOUT = 5 mA, VCC = 0 → 6 V
IOUT = 5 mA, Output ON
VOUT = 12 V
Under-Voltage Lockout
Low Output Voltage
Output Current Limit
Output Leakage Current
Supply Current
VCC(UV)
VOUT(L)
IOUTM
IOFF
5.0
0.7
45
V
–
1.6
55
10
15
16
V
25
–
mA
µA
VOUT = 24 V, Output OFF
Output OFF, Target Speed = 0 RPM
5.0
9.0
16
ICC
–
mA
Pulses
Calibration Count
ncal
Output falling mechanical edges
after power on for startup calibration
to be complete
16
Calibration Update
nup
Output falling mechanical edges
for the threshold calibration to be
complete
64
64
64
Pulses
Power-On Time
Output Rise Time
Output Fall Time
tpo
tr
VCC > 6 V
–
–
–
200
3.0
1.0
500
6.0
3.0
µs
µs
µs
RL = 2.5 kΩ, CL = 10 pF
RL = 2.5 kΩ, CL = 10 pF
tf
NOTE: Typical data is at VCC = 12 V and TA = +25°C and is for design information only.
ATS632LSC
HALL-EFFECT
GEAR-TOOTH SENSOR
SUBASSEMBLY
OPERATION over operating voltage and temperature range with reference target (unless oth-
erwise specified).
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Operating Air Gap Range
AG
Operating,
0.3
–
1.9
mm
Target Speed > 20 RPM
Output Polarity
–
Operating, Over Tooth
Operating, Over Valley
Low
High
–
Low
High
±0.25
Low
High
±0.50
–
–
°
Timing Accuracy
tθ
Target Speed < 3500 RPM,
0.3 mm ≤ AG ≤ 1.9 mm
NOTE: Air Gap is defined as the distance from the face of the sensor subassembly to the target.
TARGET DESIGN CRITERIA
Limits
Characteristic
Valley Depth
Valley Width
Tooth Width
Thickness
Symbol
Description
Min.
Typ.
5.0
5.0
5.0
5.0
–
Max.
Units
mm
mm
mm
mm
mm
ht
–
–
–
–
–
–
(PC - T)
–
–
T
F
–
–
Eccentricity
Timing accuracy may change
±0.25
TARGET DIMENSIONS
Diameter
Thickness
(F)
Tooth Width
(T)
Valley Width
(PC - T)
Valley Depth
(ht)
Type
(Do)
Reference Target
Characterization Target #1
Characterization Target #2
84 mm
84 mm
35 mm
16 mm
16 mm
7 mm
9 mm
13 mm
5 mm
5 mm
6 mm
1 tooth, 180°
1 tooth, 180°
NOTE: Timing accuracy data is taken by recalibrating the unit at each air gap.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ATS632LSC
HALL-EFFECT
GEAR-TOOTH SENSOR
SUBASSEMBLY
TYPICAL OPERATING CHARACTERISTICS
3.0
2.0
1.0
3.0
2.0
1.0
TARGET #1
-40°C
+25°C
TARGET #1
-40°C
+25°C
+150°C
+150°C
RISING EDGE
0
0
FALLING EDGE
-1.0
-1.0
-2.0
-3.0
-2.0
-3.0
0.5
0.5
0
0.25
0.75
1.0
1.25
1.5
1.75
0
0.25
0.75
1.0
1.25
1.5
1.75
AIR GAP IN MILLIMETERS
AIR GAP IN MILLIMETERS
Dwg. GH-063-4
Dwg. GH-063-5
3.0
2.0
1.0
3.0
2.0
1.0
TARGET #2
TARGET #2
-40°C
+25°C
+150°C
-40°C
+25°C
+150°C
0
0
FALLING EDGE
RISING EDGE
-1.0
-1.0
-2.0
-3.0
-2.0
-3.0
0.5
0.5
0
0.25
0.75
1.0
1.25
1.5
1.75
0
0.25
0.75
1.0
1.25
1.5
1.75
AIR GAP IN MILLIMETERS
AIR GAP IN MILLIMETERS
Dwg. GH-063-6
Dwg. GH-063-7
continued next page…
ATS632LSC
HALL-EFFECT
GEAR-TOOTH SENSOR
SUBASSEMBLY
TYPICAL OPERATING CHARACTERISTICS — Continued
51.0
50.5
50.0
51.0
50.5
50.0
TARGET #2
-40°C
+25°C
TARGET #1
-40°C
+25°C
+150°C
+150°C
49.5
49.0
49.5
49.0
48.5
48.0
48.5
48.0
0.5
0.5
0
0.25
0.75
1.0
1.25
1.5
1.75
0
0.25
0.75
1.0
1.25
1.5
1.75
AIR GAP IN MILLIMETERS
AIR GAP IN MILLIMETERS
Dwg. GH-008-11
Dwg. GH-008-12
+3
+3
+2
+1
0
+2
+1
0
RISING EDGE
FALLING EDGE
-1
-2
-3
-1
-2
-3
AIR GAPS
AIR GAPS
0.5 mm
1.0 mm
1.5 mm
2.0 mm
0.5 mm
1.0 mm
1.5 mm
2.0 mm
0
1000
2000
3000
4000
5000
6000
7000
0
1000
2000
3000
4000
5000
6000
7000
REFERENCE TARGET SPEED IN RPM
REFERENCE TARGET SPEED IN RPM
Dwg. GH-064-3
Dwg. GH-064-4
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ATS632LSC
HALL-EFFECT
GEAR-TOOTH SENSOR
SUBASSEMBLY
CRITERIA FOR DEVICE QUALIFICATION
All Allegro sensors are subjected to stringent qualification requirements prior to being released to production. To
become qualified, except for the destructive ESD tests, no failures are permitted.
Test Method and
Test Conditions
Samples
Per Lot
Qualification Test
Test Length
Comments
Temperature Humidity
Bias Life
JESD22-A101,
T = 85°C, RH = 85%
A
1000 hrs
48
Device biased for
minimum power
Bias Life
JESD22-A108,
1000 hrs
168 hrs
48
48
T = 150°C, T = 165°C
A
J
(Surge Operating Life)
JESD22-A108,
T = 175°C, T = 190°C
A
J
Autoclave, Unbiased
JESD22-A102,
T = 121°C, 15 psig
A
96 hrs
1000 hrs
48
48
48
High-Temperature
(Bake) Storage Life
JESD22-A103,
T = 170°C
A
Temperature Cycle
JESD22-A104
1000 cycles
-55°C to +150°C
ESD,
Human Body Model
CDF-AEC-Q100-002
Pre/Post
Reading
3 per
test
Test to failure
All leads > 8 kV
APPLICATIONS INFORMATION
self-calibration periodically (after every 64 output pulses) if
necessary. These two functions should be tested using
the following procedure.
Recommended Evaluation Technique. The self-
calibrating feature of the ATS632LSC requires that a
special evaluation technique be used to measure its high-
accuracy performance capabilities. Installation inaccura-
cies are calibrated out at power on; hence, it is extremely
important that the device be re-powered at each air gap
when gathering timing accuracy data.
1. Set the air gap to the desired value.
2. Power down and then power on the device.
3. Rotate the target at the desired speed.
4. Wait for calibration to complete (16 output pulses to
occur).
Self-Calibrating Functions. This subassembly is
designed to minimize performance variation caused by
the large air gap variations resulting from installation by
self-calibrating at power-on. It is also designed to mini-
mize performance variation caused by the smaller, slower
air gap changes resulting from temperature change and
gear run-out during continuous operation by updating the
5. Monitor output for correct switching and measure
accuracy.
6. Repeat the above for multiple air gaps within the
operating range of the device.
7. This can be repeated over the entire temperature
range.
ATS632LSC
HALL-EFFECT
GEAR-TOOTH SENSOR
SUBASSEMBLY
APPLICATIONS INFORMATION — Continued
Measurement of the effect of changing air gap after power
on:
Operation with Fine-Pitch Gears. The self-calibration
routines allow the detection of fine-pitch gears once the
target is rotating. The major issue in these applications is
the impact of gear run-out on the baseline of the magnetic
field. Excessive run-out may result in tooth edges not
being detected.
1. Set the air gap to the desired value (nominal, for
example). Rotate the target at the desired speed.
Apply power to the subassembly. Wait for 16 output
pulses to occur. Monitor output for correct switching
and measure accuracy.
Signal Duty Cycle. For regular tooth geometries, precise
duty cycle is maintained over the operating air gap and
temperature range due to the good symmetry of the
magnetic switch points of the device.
2. Change the air gap by ± 0.25 mm. Do not re-power
subassembly. Wait for 64 output pulses to occur.
Monitor the output for correct switching and measure
accuracy.
Output. The output of the subassembly is a short-circuit-
protected open-collector stage capable of sinking 20 mA.
An external pull-up (resistor) to a supply voltage of not
more than 24 V must be supplied either at the sensor
module or at the controller.
Device Switch Points. The device switch points are
referenced to the peak-to-peak values of the gain-ad-
justed signal. The comparator thresholds have been
chosen to provide timing accuracy, as well as limited
immunity from mis-detection caused by short valley
conditions or by gear run-out.
Output Polarity. The switching of the output is independent
of the direction of gear rotation.
Gear Design Criteria.* The system was designed to
work correctly with minimum valley depths of 5 mm and
minimum valley widths of 13 mm. As the valley depth
decreases, the valley field rises above the open-circuit
value of the magnetic circuit when the sensor is at mini-
mum air gap. The same is true when the valley width
decreases. In both cases, the metal mass from the valley
bottom or side walls provides an interference at minimum
air gap and will provide a signal that may be interpreted
as a tooth upon power on. It is important to note that this
anomaly will normally only affect the power-on state of the
device and the self-calibration circuitry will null this
baseline shift when the device is in running mode.
Power Supply Protection. These devices require
minimal protection circuitry during operation from a low-
voltage line. The internal voltage regulator provides
immunity to power supply variations between 6 V and
24 V. EMI/RFI protection is provided as part of the
internal regulator. In extremely noisy environments,
additional (external) components may be required.
* In application, the terms “gear” and “target” are often
interchanged. However, “gear” is preferred when motion
is transferred.
Signal-Timing Accuracy. Timing accuracy is improved
with larger gear diameters. The magnetic field profile has
a defined spread that narrows in degrees as the target
diameter increases. The slope of this magnetic profile
also changes with air gap. For highest accuracy, targets
greater than 100 mm diameter should be used.
Additional applications Information on gear-tooth and
other Hall-effect sensors is provided in the Allegro Inte-
grated and Discrete Semiconductors Data Book or
Application Note 27701.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ATS632LSC
HALL-EFFECT
GEAR-TOOTH SENSOR
SUBASSEMBLY
MECHANICAL INFORMATION
Component
Material
Function
Units
Package
Polyamide 6/12,
33% glass filled
264 psi deflection temp. (DTUL)
Approximate melting temperature
200°C
219°C
Circuit Board
High-temperature FR-4
1 oz Copper
Glass transition temperature
170°C
Terminals
–
–
–
–
†
Terminal Finish
Flame Class Rating
63/37 tin/lead solder plate
–
UL94V-0
† All industry-accepted soldering techniques are permitted for these subassemblies provided the indicated
maximum temperature for each component (e.g., sensor face, plastic housing) is not exceeded. Reasonable
dwell times, which do not cause melting of the plastic housing, should be used.
Sensor Location (in millimeters)
(sensor location relative to package center is the design
objective)
A
0.1
Dwg. MH-021 mm
continued next page…
ATS632LSC
HALL-EFFECT
GEAR-TOOTH SENSOR
SUBASSEMBLY
DIMENSIONS IN MILLIMETERS
GATE
PROTRUSION
0.3 MAX
6.6 5.0 1.5 TYP
1.0
Ø
PLATED THRU
TYP
5.0
6.0
4.9
0.8
10.0
11.0
Ø
27.5
MAX
1.0
TYP
Dwg. MH-020 mm
Tolerances unless otherwise specified: 1 place ±0.1 mm, 2 places ±0.05 mm.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ATS632LSC
HALL-EFFECT
GEAR-TOOTH SENSOR
SUBASSEMBLY
This page intentionally left blank
ATS632LSC
HALL-EFFECT
GEAR-TOOTH SENSOR
SUBASSEMBLY
ADAPTIVE THRESHOLD SENSORS
SELECTION GUIDE
Part Number
ATS535CSB
ATS535JSB
ATS610LSA
ATS610LSC
Application
Programmable, TPOS, large-tooth gear-position or proximity sensing (commercial temp. range)
Programmable, TPOS, large-tooth gear-position or proximity sensing (industrial/auto. temp. range)
Large-tooth, gear-position sensing – crank angle, cam angle
Large-tooth, gear-position sensing
with internal voltage regulator – crank angle, cam angle
ATS611LSB
ATS612JSB
Fine-pitch, large air gap, gear speed sensing – transmission speed, ABS
Large/small-tooth gear-position sensing – crank angle, transmission speed,
cam angle
ATS632LSA
ATS632LSC
ATS640JSB
Large-tooth, gear-position sensing (LOW digital output state over a tooth),
cam angle
Large-tooth, gear-position sensing (LOW digital output state over a tooth),
with internal voltage regulator – cam angle
TPOS, gear-position sensing for two-wire applications
Allegro MicroSystems, Inc. reserves the right to make, from time to time,
such departures from the detail specifications as may be required to permit
improvements in the design of its products.
The information included herein is believed to be accurate and reliable.
However, Allegro MicroSystems, Inc. assumes no responsibility for its use;
nor for any infringements of patents or other rights of third parties which may
result from its use.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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