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ATS660LSB 데이터시트 PDF




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부품번호 ATS660LSB 기능
기능 TRUE ZERO-SPEED/ HALL-EFFECT ADAPTIVE GEAR-TOOTH SENSOR
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ATS660LSB 데이터시트, 핀배열, 회로
ATS660LSB
Some restrictions may apply to cer-
tain types of sales. Contact factory
for details.
TRUE ZERO-SPEED, HALL-EFFECT
ADAPTIVE GEAR-TOOTH SENSOR
1
2
3
4
Pin 1 = Supply
Pin 2 = Output
Pin 3 = Internal Connection
Pin 4 = Ground
Dwg. AH-006-4
PRELIMINARY INFORMATION
(subject to change without notice)
October 20, 2000
ABSOLUTE MAXIMUM RATINGS
at TA = 25°C
Supply Voltage, VCC ........................ 26.5 V*
Reverse Supply Voltage, VRCC ............ -24 V
Output OFF Voltage, VOUT ................. 26.5 V
Reverse Output Voltage, VROUT .......... -24 V
Continuous Output Current, IOUT ....... 20 mA
Reverse Output Current, IROUT .......... 50 mA
Package Power Dissipation,
PD .......................................... See Graph
Operating Temperature Range,
TA ............................. -40°C to +150°C*
Junction Temperature,
(continuous), TJ .......................... +165°C
(100 hr), TJM ............................... +180°C
Storage Temperature, TS ................... +170°C
* Operation at increased supply voltages with
external circuitry is described in Applications
Information. Devices for operation at in-
creased temperatures are available on special
order.
The ATS660LSB is an ideal gear-tooth sensor solution for uniform
teeth targets as found in today’s demanding transmission applications.
This digital differential Hall-effect sensor is the choice when repeatabil-
ity and timing accuracy count. The ATS660LSB incorporates patented
self-calibration circuitry (U.S. Pat. 5,917,320) that nulls out the effects
of installation air gap, ambient temperature, and magnet offsets to
provide superior timing accuracy with symmetrical targets over large
operating air gaps — typical of targets used in speed-sensing applica-
tions (pitches varying from below 0.5 to over 1.2 teeth per diametric
millimeter). The self-calibration at power up keeps the performance
optimized over the life of the sensor. The ATS660LSB has an open-
collector output for direct digital interfacing with no further signal
processing required. This device is available in a small 9-mm diameter
by 7-mm long package for optimal manufacturing.
The integrated circuit incorporates a dual-element Hall-effect
sensor and signal processing that switches in response to differential
magnetic signals created by the ferrous gear teeth. The circuitry
contains a sophisticated digital circuit to eliminate magnet and system
offsets and to achieve true zero-speed operation . D-to-A converters are
used to adjust the device gain at power on and to allow air-gap indepen-
dent switching, which greatly reduces vibration sensitivity of the
device.
FEATURES AND BENEFITS
I Fully optimized differential digital gear-tooth sensor
I Single-chip sensing IC for high reliability
I High vibration immunity
I Precise duty cycle
I Small mechanical size (9 mm diameter x 7 mm length)
I Automatic gain control circuitry (self calibration)
I True zero-speed operation
I Under-voltage lockout
I Wide operating temperature range
I Optimized Hall IC magnetic circuit
I Digital signal processing
I Large operating air gap range
I Wide operating voltage range
I Excellent repeatability performance
I Defined power-on state
Always order by complete part number: ATS660LSB .




ATS660LSB pdf, 반도체, 판매, 대치품
ATS660LSB
TRUE ZERO-SPEED,
HALL-EFFECT ADAPTIVE
GEAR-TOOTH SENSOR
OPERATION with reference gear at TA = +25°C.
Characteristic
Air-Gap Range
Calibration Cycle
Recalibration (Update)
Minimum Speed
Maximum Speed
Duty Cycle Range
Symbol
AG
ncal
nrcal
vmin
vmax
DC
Test Conditions
Operational
Output edges before which
calibration is completed
Operating
Teeth (cycles) per second
Teeth (cycles) per second
1000 rpm, 0.5 mm < AG < 2.0 mm
Limits
Min. Typ. Max.
0.5 – 2.5
111
Units
mm
Tooth
64 64 64 Teeth
– 0 – kHz
– 20 –
kHz
– – ±5 %
REFERENCE GEAR DIMENSIONS
Characteristic
Diameter
Tooth Width
Valley Width
Valley Depth
Thickness
Symbol
DO
T
(pC – T)
ht
F
Description
Limits
Min. Typ. Max.
– 120 –
– 3.0 –
– 3.0 –
– 3.0 –
3.0 –
Units
mm
mm
mm
mm
mm
115 Northeast Cutoff, Box 15036
4 Worcester, Massachusetts 01615-0036 (508) 853-5000

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ATS660LSB 전자부품, 판매, 대치품
ATS660LSB
TRUE ZERO-SPEED,
HALL-EFFECT ADAPTIVE
GEAR-TOOTH SENSOR
DEVICE DESCRIPTION
Subassembly description. The ATS660LSB true
zero-speed gear-tooth sensor system is a Hall IC + magnet
configuration that is fully optimized to provide digital
detection of gear-tooth* edges in a small package size.
The sensor is packaged in a miniature plastic housing that
has been optimized for size, ease of assembly, and
manufacturability. High operating-temperature materials
are used in all aspects of construction.
The use of the sensor is simple. After correct power is
applied to the component, it is capable of instantly provid-
ing digital information that is representative of the profile
of a rotating gear. No additional optimization or process-
ing circuitry is required. This ease of use should reduce
design time and incremental assembly costs for most
applications.
Sensing technology. The gear-tooth sensor subassem-
bly contains a single-chip differential Hall-effect sensor
IC, a samarium-cobalt magnet, and a flat ferrous pole
piece. The Hall IC consists of two Hall elements spaced
2.2 mm apart, located so as to measure the magnetic
gradient created by the passing of a ferrous object (a gear
tooth). The two elements measure the field gradient and
convert it to a voltage that is then processed to provide a
digital output signal.
SENSOR
POLE PIECE
SOUTH
PERMANENT
MAGNET
NORTH
1 2 3 4 Dwg. MH-016-4
* In application, the terms “gear” and “target” are often inter-
changed. However, “gear” is preferred when motion is trans-
ferred.
Internal electronics. The ATS660LSB is a self-
calibrating sensor that contains two Hall-effect elements, a
temperature-compensated amplifier, and offset cancella-
tion circuitry. Also contained in the device is a voltage
regulator to provide supply rejection over the operating
voltage range.
The self-calibrating circuitry is unique. After power up,
the device measures the peak-to-peak magnetic signal and
adjusts the gain using an on-chip D-to-A converter to
make the internal signal amplitude constant independent of
the installation air gap of the sensor. This feature allows
air-gap-independent operational characteristics.
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
AG = 2.75 mm
0.25 mm INTERVALS
AG = 0.25 mm
RELATIVE TARGET POSITION
Magnetic signal
Dwg. GH-061-2
1000
800
600
400
200
0
-200
-400
-600
-800
AG = 2.75 mm
AG = 0.25 mm
-1000
RELATIVE TARGET POSITION
Dwg. GH-061-3
Elecrtical signal after gain control
www.allegromicro.com
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ATS660LSB

TRUE ZERO-SPEED/ HALL-EFFECT ADAPTIVE GEAR-TOOTH SENSOR

Allegro MicroSystems
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