ATS617LSG datasheet(4/16 Pages) ALLEGRO

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Dynamic, Self-Calibrating, Peak-Detecting, Differential

Hall Effect Gear Tooth Sensor IC

ATS617LSG

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

OPERATING CHARACTERISTICS (continued) over operating voltage and temperature range, unless otherwise noted

Characteristic

Symbol

Test Condition

Min.

Typ.1

Max.

Unit

Performance Characteristics (continued)

Initial Calibration Cycle5

ncal

Output edges before calibration is completed, at fsig<100Hz

–

edge

Calibration Mode Disable

ndis

Output falling edges for startup calibration to be complete

edge

Relative Timing Accuracy, Sequential6,7

Eθ

Target Speed = 1000 rpm, BAG(p-p) > 100 G

–

±0.5

±0.75

deg.

Target Speed = 1000 rpm, BAG(p-p) > 60 G

–

±1.5

deg.

Allowable User Induced Differential Offset4

∆BApp

Output switching only; may not meet data sheet specifica-

tions

–

±50

Switching Hysteresis, Start-up

VSWHYS(su)

–

190

–

Switching Hysteresis, Running Mode

VSWHYS(rm)

–

105

–

1 Typical data is at VCC = 12 V and TA = 25°C. Performance may vary for individual units, within the specified maximum and minimum limits.

2 Maximum voltage must be adjusted for power dissipation and junction temperature; see Power Derating section.

3 This performance is not affected by the design of the ATS617, it is determined only by the external interface circuitry.

4 1 G (gauss) = 0.1 mT (millitesla), exactly.

5 Non-uniform magnetic profiles may require additional edges before calibration is complete.

6 For Allegro 60+2 reference target.

7 Accuracy may be compromised during the calibration cycle.

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