Allegro ATS611LSB, ATS610LSA Datasheet

ATS610LSA AND ATS611LSB

DYNAMIC, PEAK-DETECTING,
DIFFERENTIAL HALL-EFFECT
GEAR-TOOTH SENSORS

DYNAMIC, PEAK-DETECTING, DIFFERENTIAL

HALL-EFFECT GEAR-TOOTH SENSORS

1

2

3

4

Pin 1 = Supply
Pin 2 = Output
Pin 3 = Capacitor
Pin 4 = Ground

PRELIMINARY INFORMATION

(subject to change without notice)

December 2, 1998

ABSOLUTE MAXIMUM RATINGS

over operating temperature range

Supply Voltage, VCC.........................16 V*

Reverse Supply Voltage, V
Output OFF Voltage, V
Reverse Output Voltage, V
Continuous Output Current, I
Minimum External Capacitance,

............................................. 0.1 µF

C

3

Package Power Dissipation,

.................................... See Graph

P

D

Operating Temperature Range,

........................... -40°C to +150°C*

T

A

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.

RCC

................. 18 V

OUT

OUT

OUT

Dwg. AH-006

....... -0.5 V

....... -0.5 V

... 25 mA

ATS610LSA

AND

ATS611LSB

The ATS610LSA and ATS611LSB gear-tooth sensors are opti­mized Hall IC plus magnet subassemblies that provide a user-friendly
solution for digital gear-tooth sensing applications. Each subassembly
combines in a compact high-temperature plastic package, a samarium-cobalt
magnet, a pole piece, and a differential Hall-effect IC that has been
optimized to the magnetic circuit. These sensors can be easily used in
conjunction with a wide variety of gear or target shapes and sizes.

The ATS610LSA 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 ATS611LSB is optimized
to sense fine-pitch gears over large working air gaps (e.g., transmis­sion or ABS). These sensor subassemblies are ideal for use in
gathering speed, position, and timing information using gear-tooth-based
configurations.

The gear-sensing technology used for these sensor plus magnet
subassemblies 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.

continued next page…

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

Uses Small Value Ceramic Capacitors

■ Under-Voltage Lockout

■ Wide Operating Voltage Range

■ Defined Power-Up State

Always order by complete part number, e.g., ATS610LSA .

Data Sheet

27627.100

ATS610LSA AND ATS611LSB

ALLOWABLE PACKAGE POWER DISSIPATION IN mW

DYNAMIC, PEAK-DETECTING,
DIFFERENTIAL HALL-EFFECT
GEAR-TOOTH SENSORS

Both sensors are packaged in miniature plastic
housings that have been optimized for size, ease of assembly,
and manufacturability. High operating temperature materi­als are used in all aspects of construction. Devices for
operation at increased temperatures are also available on
special order.

ATS610LSA: Large-tooth, gear-position sensing —
crank angle, cam angle.

ATS611LSB: Fine-pitch, large air gap, gear-speed
sensing — transmission, ABS.

1000

800

600

400

200

0

"SA" PACKAGE

θJA

= 147°C/W

R

"SB" PACKAGE

θJA

~ 150°C/W

R

60 100 140 18020

40 80 120

AMBIENT TEMPERATURE IN °C

160

Dwg. GH-065

1

REG

MAGNET

SUPPLY

X

X

FUNCTIONAL BLOCK DIAGRAM

POWER-ON

LOGIC

TRACK &

HOLD

3

CAPACITOR

E1

E2

UVLO

+

–

OUTPUT

2

+

–

4

GROUND

Dwg. FH-014

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

W
Copyright © 1997, Allegro MicroSystems, Inc.

ATS610LSA AND ATS611LSB

DYNAMIC, PEAK-DETECTING,
DIFFERENTIAL HALL-EFFECT
GEAR-TOOTH SENSORS

ELECTRICAL CHARACTERISTICS over operating voltage and temperature range,
C

= 0.1 µF to 0.47 µF.

3

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Supply Voltage V

CC

Power-On State POS V
Under-Voltage Lockout V
Under-Voltage Hysteresis V
Output Saturation Voltage V
Output Leakage Current I
Supply Current I

CC(UV)

CC(hys)

OUT(SAT)

OFF

CC

Operating, TJ < 165°CV

= 0 → 5 V HIGH HIGH HIGH –

CC

I

= 20 mA, VCC = 0 → 5 V 2.5 – 3.5 V

OUT

Lockout (V
I

= 20 mA – 90 400 mV

OUT

V

= 16 V – 0.2 15 µA

OUT

) – Shutdown – 0.1 – V

CC(UV)

Output OFF 5.5 7.7 11 mA

Output ON 8.5 10.5 13 mA
Power-On Delay t
Output Rise Time t
Output Fall Time t

NOTE: Typical data is at VCC = 5 V and TA = +25°C and is for design information only.

on

r

f

RL = 500 Ω, CL = 10 pF – 0.2 2.0 µs

RL = 500 Ω, CL = 10 pF – 0.2 2.0 µs

CC(UV)

– 16 V

––200 µs

ATS610LSA AND ATS611LSB

DYNAMIC, PEAK-DETECTING,
DIFFERENTIAL HALL-EFFECT
GEAR-TOOTH SENSORS

ATS610LSA 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 – 2.25 mm

Target Speed > 20 RPM

Minimum Air Gap AG

Maximum Air Gap AG

Timing Accuracy t

min

max

θ

Operating, One-Tooth (180°) – 0.25 – mm
Target, Target Speed = 1000 RPM

Operating, One-Tooth (180°) – 2.75 – mm
Target, Target Speed = 1000 RPM

Target Speed = 1000 RPM, – ±0.5 ±1.0 °

0.4 mm ≤ AG ≤ 2 mm

ATS611LSB 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 – 2.5 mm

Target Speed > 20 RPM

Minimum Air Gap AG

min

Operating, One-Tooth (180°) – 0.75 – mm
Target*, Target Speed = 1000 RPM

Maximum Air Gap AG

Timing Accuracy t

max

θ

Operating, One-Tooth (180°) – 3.25 – mm
Target*, Target Speed = 1000 RPM

Target Speed = 1000 RPM, – ±0.5 ±1.0 °

0.4 mm ≤ AG ≤ 2 mm

* The one-tooth (180°) target is not recommended for use with the ATS611LSB.

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

ATS610LSA AND ATS611LSB

DYNAMIC, PEAK-DETECTING,
DIFFERENTIAL HALL-EFFECT
GEAR-TOOTH SENSORS

D = 115 mm

o

TARGET

F (THICKNESS) ≥ 3 mm

t

h = 5 mm

REFERENCE TARGET

3 mm

T = 3 mm

T = 180°

(ONE TOOTH)

E1 E2

SENSOR

POLE PIECE

SOUTH

PERMANENT

MAGNET

NORTH

1 2 3 4

TARGET

F (THICKNESS) ≥ 3 mm

E1 E2
SENSOR

POLE PIECE

SOUTH

D = 115 mm

o

AIR GAP

AIR GAP

t

h = 5 mm

Dwg. MH-016 mm

ONE-TOOTH (180

°) TARGET

PERMANENT

MAGNET

NORTH

1 2 3 4

Dwg. MH-016-1 mm