Description

The ATS605LSG provides a single IC solution to rotational

position sensing applications with a ferrous gear target.

The SG package incorporates a rare earth pellet for ease of

manufacturing, consistent performance over temperature, and

enhanced reliability.

ThreeHallelementsareincorporatedtocreatetwoindependent

differential channels. These channels are processed by the

IC which contains a sophisticated digital circuit designed

to eliminate the detrimental effects of magnet and system

offsets. Hall differential signals are used to produce a highly

accurate speed output and, if desired, provide information on

the direction of rotation.

Advanced calibration techniques are used to optimize signal

offset and amplitude. This calibration, combined with the

digital tracking of the signal, results in accurate switch-points

over air gap, speed, and temperature. The open-drain outputs

provide voltage output signals which mirror the sensed target’s

shape, with a phase separation between the two channels

proportionate to the size of the target teeth vs. the Hall element

spacing. This sensor IC system is optimized for a variety of

applicationsrequiringdualphasegearspeedandpositionsignal

information or simultaneous high-resolution gear speed and

direction information.

The ATS605 is offered in a lead (Pb) free 4-pin SIP package

with an integrated back-basing magnet with a 100% matte tin

plated leadframe.

ATS605LSG-DS

Features and Benefits

•

Two independent digital outputs representing the sensed

target’s mechanical profile

•

Optional output with high resolution position and direc-

tion detection information

•

Air gap independent switch points

•

Integrated back-biasing magnetic circuit

•

Immunity to external magnetic interference

•

Wide operating voltage range

•

Single chip IC for high reliability

•

Robust test coverage and reliability using Scan and

IDDQ test methodologies

•

Optional Double-Bandwidth configuration

Dual Output Differential

Speed and Direction Sensor IC

Package: 4-pin SIP (suffix SG)

ATS605LSG

Hall Amp

VCC

REGULATOR

(Analog)

REGULATOR

(Digital)

OFFSET

ADJUST

OFFSET

ADJUST

AGC

AGC

FILTER

FILTER

ADC

Test

Test

Test

Test

XOR SPEED

SPEED B

SPEED A

DIRECTION

Current

Limit

Current

Limit

Switch

Switch

OUT A

OUT B

GND

SYNCHRONOUS

DIGITAL

CONTROLLER

ADC

MULTIPLEXED

SIGNALS

MULTIPLEXED

SIGNALS

Not to scale

Functional Block Diagram