Datasheet ATS660LSB Datasheet (Allegro)

ATS660LSB

Data Sheet

27627.107

Some restrictions may apply to cer­tain types of sales. Contact factory
for details.

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 T

= 25°C

A

Supply Voltage, VCC........................ 26.5 V*

Reverse Supply Voltage, V
Output OFF Voltage, V
Reverse Output Voltage, V
Continuous Output Current, I
Reverse Output Current, I
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 in­creased temperatures are available on special
order.

OUT

............ -24 V

RCC

................. 26.5 V

.......... -24 V

ROUT

....... 20 mA

OUT

.......... 50 mA

ROUT

TRUE ZERO-SPEED, HALL-EFFECT

ADAPTIVE GEAR-TOOTH SENSOR

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 repeatabil­ity 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 applica­tions (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 open­collector 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 indepen­dent switching, which greatly reduces vibration sensitivity of the
device.

FEATURES AND BENEFITS

■ Fully optimized differential digital gear-tooth sensor

■ Single-chip sensing IC for high reliability

■ High vibration immunity

■ Precise duty cycle

■ Small mechanical size (9 mm diameter x 7 mm length)

■ Automatic gain control circuitry (self calibration)

■ True zero-speed operation

■ Under-voltage lockout

■ Wide operating temperature range

■ Optimized Hall IC magnetic circuit

■ Digital signal processing

■ Large operating air gap range

■ Wide operating voltage range

■ Excellent repeatability performance

■ Defined power-on state

Always order by complete part number: ATS660LSB .

ATS660LSB

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

FUNCTIONAL BLOCK DIAGRAM

MAGNET

Dwg. FH-019-2A

X

E1

X

E2

–

+

REF

–

+

Pin 3 must be externally connected to pin 4.

REG

SUPPLY1

32 V

UVLO

POSITIVE PEAK

DIGITAL PROC.

NEGATIVE PEAK

DIGITAL PROC.

POWER-ON

LOGIC

REFERENCE

GENERATOR

THRESHOLD

COMPARATORS

–

+

–

+

LOGIC

OUTPUT

INTERNAL

3

CONNECTION

CONTROL

CURRENT

LIMIT

<1Ω

OUTPUT

2

GROUND

4

1000

800

100 HO

600

400

200

0

ALLOWABLE PACKAGE POWER DISSIPATION IN mW

40 80 120

CO

60 100 140 18020

AMBIENT TEMPERATURE IN °C

URS M

NTINUO

US

2

AX.

R

θJA

= 147°C/W

160

Dwg. GH-065-6

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
Copyright © 2000 Allegro MicroSystems, Inc.

ATS660LSB

TRUE ZERO-SPEED,

HALL-EFFECT ADAPTIVE

GEAR-TOOTH SENSOR

ELECTRICAL CHARACTERISTICS at VCC = V

= 12 V and TA = +25°C (unless otherwise

OUT

noted).

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Supply Voltage V

CC

Power-On State POS VCC = 0 → 5 V HIGH* HIGH* HIGH* –

Under-Voltage Lockout V

Low Output Voltage V

Output Current Limit I

Output LeakageCurrent I

Supply Current I

Output Rise Time I

Output Fall Time I

CC(UV)

OUT(SAT)

OUTM

OFF

CC

r

f

Operating, TJ < 165°C 4.5 12 24 V

VCC = 0 → 5 V 4.1 4.2 4.3 V

I

= 20 mA – 0.2 0.4 V

OUT

25 45 55 mA

V

= 24 V – 0.2 10 µA

OUT

Output off 3.5 7.0 12 mA

Output on 5.0 8.5 14 mA

RL = 500 Ω, CL = 10 pF – 0.2 5.0 µs

RL = 500 Ω, CL = 10 pF – 0.2 5.0 µs

Power-On Time t

Zener Voltage V

on

Z

* Output transistor is OFF (high logic level).

Reference gear, <100 rpm – – 200 µs

IZT = TBD – 32 – V

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3

ATS660LSB

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

OPERATION with reference gear at TA = +25°C.

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Air-Gap Range AG Operational 0.5 – 2.5 mm

Calibration Cycle n

Recalibration (Update) n

Minimum Speed v

Maximum Speed v

Duty Cycle Range DC 1000 rpm, 0.5 mm < AG < 2.0 mm – – ±5%

cal

rcal

min

max

Output edges before which 1 1 1 Tooth
calibration is completed

Operating 64 64 64 Teeth

Teeth (cycles) per second – 0 – kHz

Teeth (cycles) per second – 20 – kHz

REFERENCE GEAR DIMENSIONS

Limits

Characteristic Symbol Description Min. Typ. Max. Units

Diameter D

Tooth Width T – 3.0 – mm

Valley Width (pC – T) – 3.0 – mm

O

– 120 – mm

Valley Depth h

Thickness F 3.0 – – mm

4

t

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

–3.0– mm

HALL-EFFECT ADAPTIVE

TYPICAL CHARACTERISTICS

ATS660LSB

TRUE ZERO-SPEED,

GEAR-TOOTH SENSOR

12

10

8.0

6.0

4.0

SUPPLY CURRENT IN mA

2.0

0

0

5

SUPPLY VOLTAGE IN VOLTS

12

10

8.0

6.0

4.0

B > BOP

TA = 150°C

A = +25°C

T

A = -40°C

T

10

15 20 25

30

Dwg. GH-041-4

SUPPLY CURRENT IN mA

2.0

0

0

5

SUPPLY VOLTAGE IN VOLTS

10

15 20 25

B < B

TA = 150°C

A

= +25°C

T

A

= -40°C

T

RP

30

Dwg. GH-041-3

1.2

1.0

0.8

0.6

0.4

SUPPLY CURRENT IN mA

0.2

0

-30

-25

REVERSE SUPPLY VOLTAGE IN VOLTS

-20

TA = 150°C

A = +25°C

T

A = -40°C

T

-15 -10 -5.0

Dwg. GH-031-2

350

300

250

200

150

100

50

B > B

TA = 150°C

A

= +25°C

T

A

= -40°C

T

OP

OUTPUT SATURATION VOLTAGE IN mV

0

0

0

5.0

10 15 20 25

OUTPUT SINK CURRENT IN mA

Dwg. GH-059-1

www.allegromicro.com

5

ATS660LSB

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

TYPICAL DUTY CYCLE AS A FUNCTION OF AIR GAP

— CURVES COMING

6

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

DEVICE DESCRIPTION

ATS660LSB

TRUE ZERO-SPEED,

HALL-EFFECT ADAPTIVE

GEAR-TOOTH SENSOR

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 provid­ing digital information that is representative of the profile
of a rotating gear. No additional optimization or process­ing circuitry is required. This ease of use should reduce
design time and incremental assembly costs for most
applications.

Sensing technology. The gear-tooth sensor subassem­bly 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

* In application, the terms “gear” and “target” are often inter­changed. However, “gear” is preferred when motion is trans­ferred.

Dwg. MH-016-4

Internal electronics. The ATS660LSB is a self-
calibrating sensor that contains two Hall-effect elements, a
temperature-compensated amplifier, and offset cancella­tion 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

DIFFERENTIAL MAGNETIC FIELD IN GAUSS

-1000

RELATIVE TARGET POSITION

AG = 2.75 mm

0.25 mm INTERVALS
AG = 0.25 mm

Dwg. GH-061-2

Magnetic signal

1000

800

600

400

200

0

-200

-400

ELECTRICAL SIGNAL IN mV

-600

-800

-1000

RELATIVE TARGET POSITION

AG = 2.75 mm
AG = 0.25 mm

Dwg. GH-061-3

Elecrtical signal after gain control

www.allegromicro.com

7

ATS660LSB

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

DEVICE DESCRIPTION — Continued

In addition to the gain control circuitry, the device also
has provisions to zero out chip, magnet, and installation
offsets. This is accomplished using two D-to-A converters
that capture the peak and valley of the signal and use them
as a reference for the switching comparator. This allows
the switch points to be precisely controlled independent of
air gap or temperature.

The two Hall transducers and the electronics are inte­grated on a single silicon substrate using a proprietary
BiCMOS process.

Solution advantages. The ATS660LSB true zero-
speed detecting gear-tooth sensor subassembly uses a
differential Hall-element configuration. This configuration
is superior in most applications to a classical single­element GTS. The single-element configuration com­monly used requires the detection of an extremely small
signal (often <100 G) that is superimposed on an ex­tremely large back biased field, often 1500 G to 3500 G.
For most gear configurations, the back-biased field values
change due to concentration effects, resulting in a varying
baseline with air gap, with eccentricities, and with vibra­tion. The differential configuration eliminates the effects
of the back-biased field through subtraction and, hence,
avoids the issues presented by the single Hall element.
The signal-processing circuitry also greatly enhances the
functionality of this device. Other advantages are

■ temperature drift* — changes in temperature do not
greatly affect this device due to the stable amplifier design
and the offset rejection circuitry,

■ timing accuracy/duty cycle variation due to air gap*
— the accuracy variation caused by air-gap changes is
minimized by the self-calibration circuitry. A two-to-three
times improvement can be seen over conventional zero­crossing detectors,

■ dual edge detection — because this device references
the positive and negative peaks of the signal, dual edge
detection is guaranteed,

■ immunity to magnetic overshoot — the air-gap
independent hysteresis minimizes the impact of overshoot
on the switching of device output,

■ response to surface defects in the gear — the gain­adjust circuitry reduces the effect of minor gear anomalies
that would normally causes false switching,

■ immunity to vibration and backlash — the gain-adjust
circuitry keeps the hysteresis of the device roughly propor­tional to the peak-to-peak signal. This allows the device to
have good immunity to vibration even when operating at
close air gaps,

■ immunity to gear run out — the differential-sensor
configuration eliminates the base-line variations caused by
gear run out, and

■ use with stamped-gear configurations — the high­sensitivity switch points allow the use of stamped gears.
The shallow mechanical slopes created by the stamping
process create an acceptable magnetic gradient down to
zero speed. The surface defects caused by stamping the
gear are ignored through the use of gain control circuitry.

Operation versus air-gap/tooth geometry. Operat­ing specifications are impacted by tooth size, valley size
and depth, gear material, and gear thickness. In general,
the following guidelines should be followed to achieve
greater than 2 mm air gap from the face of unit:

■ tooth width (T) > 2 mm;

■ valley width (p

■ valley depth (h

■ gear thickness (F) > 3 mm; and the

■ gear material must be low-carbon steel.

Signal duty cycle. For regular tooth geometry, precise
duty cycle is maintained over the operating air-gap and
temperature range due to an extremely good symmetry in
the magnetic switch points of the device. For irregular
tooth geometry, there will a small but noticeable change in
pulse width versus air gap.

- T) > 2 mm;

C

) > 2 mm;

t

* Target must be rotating for proper update algorithim
operation.

8

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

HALL-EFFECT ADAPTIVE

GEAR-TOOTH SENSOR

DEVICE DESCRIPTION — Continued

ATS660LSB

TRUE ZERO-SPEED,

Power-on state operation. The device is guaranteed

to power on (power up) in the off state (high output

voltage) regardless of the presence or absence of a gear

tooth.

Under-voltage lockout. If the supply voltage falls

below the minimum operating voltage (V

CC(UV)

), the
device output will turn off (high output voltage) and stay
off irrespective of the state of the magnetic field. This
prevents false signals caused by under-voltage conditions
from propagating through to the output of the sensor.

Output. The output of the subassembly is a short-circuit­protected open-collector stage capable of sinking 20 mA.
An external pull-up (resistor) to a supply voltage of not
more than 26.5 V must be supplied.

Output polarity. The output of the device will switch
from off to on as the leading edge of the target passes the
subassembly in the direction indicated (pin 4 to pin 1),
which means that the output voltage will be low when the
unit is facing a tooth. If rotation is in the opposite direc­tion (pin 1 to pin 4), the output of the device will switch
from on to off as the leading edge of the target passes the
subassembly, which means that the output voltage will be
high when the unit is facing a tooth.

1

2

3

4

Dwg. AH-006-1

APPLICATIONS INFORMATION

Power supply protection. The device contains an on-

chip regulator and can operate over a wide supply voltage
range. For devices that need to operate from an unregu­lated power supply, transient protection should be added
externally. For applications using a regulated line, EMI/
RFI protection is still required. Incorrect protection can
result in unexplained pulses on the output line, providing
inaccurate sensing information to the user.

EMI protection circuitry can easily be added to a PC board
for use with this device. Provisions have been made for
easy mounting of this board on the back of the unit. PC
board installation parallel to the device axis is also pos­sible.

www.allegromicro.com

4

3

2

1

Dwg. AH-007

9

ATS660LSB

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

APPLICATIONS INFORMATION — Continued

Operation from a regulated power supply. These

devices require minimal protection circuitry during
operation from a low-voltage regulated line. The on-chip
voltage regulator provides immunity to power supply
variations between 4.5 V and 26.5 V. However, even
while operating from a regulated line, some supply and
output filtering is required to provide immunity to coupled
and injected noise on the supply line. A basic RC low­pass circuit (R1C1) on the supply line and an optional
output capacitor (C2) is recommended for operation in
noisy environments. Because the device has an
open-collector output, an output pull-up resistor (RL) must
be included either at the sensor output (pin 2) or by the
signal processor input.

Operation from an unregulated power supply. In
automotive applications, where the device receives its
power from an unregulated supply such as the battery, full
protection is generally required so that the device can
withstand the many supply-side transients. Specifications
for such transients vary between car manufacturers, and
protection-circuit design should be optimized for each
application.

In the circuit shown, a standard protection circuit is

constructed using discrete components. The Zener diode
is used to provide over-voltage protection against load
dumps greater than about 40 V; for load dumps less than
about 40 V, the internal Zener is sufficient. The series
resistor (R
tor (C
limiting resistor should be sized for power dissipation

) provides current limiting and with the capaci-

1

) noise filtering. The Zener diode and current-

1

requirements. The series diode protects the external Zener
diode against reverse battery and provides protection
against transients greater than -24 V; it must be rated to
withstand the most negative transient. In many transmis­sion applications there is already a Zener diode in the
TCU, and the diode and external Zener are not necessary.

SUPPLY

20 Ω

R

R

L

C

1

0.1 µF

1

Vcc

OUTPUT

12

X

3

X

C

100 pF

2

+

-

4

Dwg. EH-008-7

Operation from regulated supply

SUPPLY

R

L

R

1

C

1

Vcc

OUTPUT

12

X

3

X

C

100 pF

2

4

+

-

Operation from unregulated supply

Dwg. EH-008-6

10

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

TRUE ZERO-SPEED,

HALL-EFFECT ADAPTIVE

GEAR-TOOTH SENSOR

APPLICATIONS INFORMATION — Continued

ATS660LSB

Recommended evaluation technique. The self-
calibrating feature of the ATS660LSB requires that a
special evaluation technique be used to measure its high­accuracy performance capabilities. Installation inaccura­cies are calibrated out at power on; hence, it is extremely
important that the device be repowered at each air gap
when gathering duty cycle data.

The ATS660LSB is designed to minimize performance
variation (caused by the large air-gap variations resulting
from installation) by self-calibrating at power-on. These
functions should be tested using the procedures described
below.

Duty cycle capabilities after correct self-calibration can
be measured as follows:

1. Set the air gap to the desired value.

2. Power down and then power up the device.

3. Rotate the gear at the desired speed.

4. Wait for calibration to complete (64 output pulses to
occur).

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 operating tem­perature range.

2.2

There is an internal update algorithm that will maintain
the correct duty cycle as air gap changes with temperature.
Large changes in air gap will require the part to be reset
(by cycling power) to maintain the correct duty cycle.

Measurement of the effect of changing air gap after
power up:

1. Set the air gap to the desired value (nominal, for
example). Rotate the gear at the desired speed. Apply
power to the subassembly. Wait for 64 output pulses to
occur. Monitor output for correct switching and measure
accuracy.

2. Change the air gap by ±0.25 mm. Do not re-power the
subassembly. Wait for update algorithm to finish adjust­ing thresholds, typically 1 to 2 rotations on a 60-tooth gear.

Operation with fine-pitch gears. For targets with a
circular pitch of less than 4 mm, a performance improve­ment can be observed by rotating the front face of the
sensor subassembly. This sensor rotation decreases the
effective sensor-to-sensor spacing and increases the
capability of detecting fine tooth or valley configurations,
provided that the Hall elements are not rotated beyond the
width of the target.

α

2.2 COS

Allegro

www.allegromicro.com

A

TARGET FACE WIDTH, F

>2.2 SIN

α

α

A

Dwg. MH-018-5 mm

11

ATS660LSB

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

APPLICATIONS INFORMATION — Continued

Signal timing accuracy. The magnetic field profile

width is defined by the sensor element spacing and nar­rows in degrees as the target diameter increases. This
results in improved timing accuracy performance for larger
gear diameters (for the same number of gear teeth).
Valley-to-tooth transistions will generally provide better
accuracy than tooth-to-valley transitions for large-tooth or
large-valley configurations. For highest accuracy, targets
greater than 100 mm in diameter should be used.

Signal duty cycle. For repetitive target structures,
precise duty cycle is maintained over the operating air gap
and temperature range due to an extremely good symmetry
in the magnetic switch points and the internal self calibra­tion of the device. For irregular tooth geometries, there
will be a small but measureable change in pulse width
versus air gap.

Additional applications Information on gear-tooth
and other Hall-effect sensors is also available in the “Hall­Effect IC Applications Guide”, which can be found in the
latest issue of the Allegro MicroSystems Electronic Data
Book, AMS-702 or Application Note 27701, or at

www.allegromicro.com

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 Samples

Qualification Test Test Conditions Test Length Per Lot Comments

Temperature Humidity JESD22-A101, 1000 hrs 77 Device biased for
Bias Life TA = 85°C, RH = 85% minimum power

Bias Life JESD22-A108, 1000 hrs 77

TA = 150°C, TJ ≤ 165°C

(Surge Operating Life) TA = 175°C, TJ ≤ 190°C 168 hrs 77

Autoclave, Unbiased JESD22-A102, 96 hrs 77

TA = 121°C, 15 psig

High-Temperature JESD22-A103, 1000 hrs 77
(Bake) Storage Life TA = 170°C

Temperature Cycle JESD22-A104 1000 cycles 77 -55°C to +150°C

ESD, CDF-AEC-Q100-002 Pre/Post 3 per Test to failure
Human Body Model Reading test All leads > x kV

12

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

ATS660LSB

TRUE ZERO-SPEED,

HALL-EFFECT ADAPTIVE

GEAR-TOOTH SENSOR

MECHANICAL INFORMATION

Component Material Function Units

Sensor Face Thermoset epoxy Maximum temperature 170°C*

Plastic Housing Thermoplastic PBT 264 psi deflection temp. (DTUL) 204°C

66 psi deflection temp. (DTUL) 216°C
Approximate melting temperature 225°C

Leads Copper — —

Lead Finish 90/10 tin/lead solder plate — †

Lead Pull — — 8 N

* Temperature excursions to 225°C for 2 minutes or less are permitted.
† 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)

2.2 mm

Lead cross section (in millimeters)

A

Dwg. MH-018-4 mm

0.48

0.36

0.41

NOM.

0.0076
MIN. PLATING
THICKNESS

0.38

NOM.

Dwg. MH-019A mm

0.44

0.35

Allegro

www.allegromicro.com

13

ATS660LSB

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

DIMENSIONS IN MILLIMETERS

DIA

8.8

7.0

7.0

2.0

3.0

NOM

0.38

1.27

TYP

1 2 3 4

0.41

0.9

Tolerances, unless otherwise specified: 1 place ±0.1 mm, 2 places ±0.05 mm.

3.9

A

8.968.09

Dwg. MH-017-1B mm

14

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

ATS660LSB

TRUE ZERO-SPEED,

HALL-EFFECT ADAPTIVE

GEAR-TOOTH SENSOR

ADAPTIVE THRESHOLD SENSORS

Part Operating
Number Temp. Range Key Applications & Salient Features

ATS610LSA -40°C to +150°C

ATS611LSB -40°C to +150°C Fine-pitch, large air gap, speed sensing – transmission speed, ABS,

ATS612JSB -40°C to +115°C Large/small-tooth speed sensing,

ATS632LSA -40°C to +150°C Large-tooth, gear-position sensing – cam angle

ATS640JSB -40°C to +115°C Small-tooth gear-position sensing for two-wire applications,

Large-tooth, speed sensing – crank angle, cam angle,
differential, peak-detecting geartooth sensor (to 20 rpm w/ 0.22 µF)

differential, peak-detecting geartooth sensor (to 20 rpm w/ 0.22 µF)

differential, peak-detecting geartooth sensor (to 20 rpm w/ 0.22 µF)

zero speed

www.allegromicro.com

15

ATS660LSB

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

16

The products described herein are manufactured under one or more

of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283;
5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719;
5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents
pending.

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 performance, reliability, or
manufacturability of its products. Before placing an order, the user is
cautioned to verify that the information being relied upon is current.

Allegro products are not authorized for use as critical components

in life-support appliances, devices, or systems without express written
approval.

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 that may result from its use.

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