ATS627LSG datasheet(4/22 Pages) ALLEGRO

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True Zero Speed, Low Jitter, High Accuracy

Position Sensor IC

ATS627LSG

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Relative Timing Accuracy, Sequential

Mechanical Falling Edges

ERRFF

0.5 mm ≤ AG ≤ 2.5 mm; constant target speed,

Running mode; relative to measurement taken

at AG = 1.5 mm

–

±0.4

deg.

Relative Timing Accuracy, Signature

Mechanical Rising Edge

ERRSIGR

0.5 mm ≤ AG ≤ 2.5 mm; constant target speed,

Running mode; relative to measurement taken

at AG = 1.5 mm

–

±0.4

deg.

Relative Timing Accuracy, Signature

Mechanical Falling Edge

ERRSIGF

0.5 mm ≤ AG ≤ 2.5 mm; constant target speed,

Running mode; relative to measurement taken

at AG = 1.5 mm

–

±1.5

deg.

Relative Repeatability, Sequential

Rising and Falling Edges6

TΘE

0.5 mm ≤ AG ≤ 2.5 mm

–

0.08

deg.

Output Propagation Delay

tdOUT

–

μs

Initial Edge Accuracy7

Edge Accuracy – First and Second

Output Edges

See figure 1

–TTARGET

deg.

Edge Accuracy – Third through Sixth

Output Edges

See figure 1

–0.5 x

TTARGET

–

+0.5 x

TTARGET

deg.

Full Edge Accuracy

Output edge count (see figure 1),

BSIG/BSEQ = 1, or no signature tooth encountered

––6

–

Output edge count (see figure 1), signature

region encountered during calibration, and

BSIG/BSEQ ≠ 1

–9

––

Input Magnetic Characteristics

Allowable Differential Sequential

Signal Variation8

BSEQ(min) /

BSEQ(max)

Total variation over 60 cycles (see figure 2)

0.5

–

BSEQ(n+1) /

BSEQ(n)

Single cycle-to-cycle variation (see figure 2)

0.6

–

Allowable Signature Amplitude Ratio

BSIG /

BSEQ

One instance per target revolution (see figure 2)

0.8

–

1.6

–

1Typical values are at TA = 25°C and VCC = 12 V.

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

3Negative current is defined as current coming out of (sourced from) the specified device terminal.

4Sustained voltages beyond the clamp voltage may cause permanent damage to the IC.

5 1 G (gauss) = 0.1 mT (millitesla).

6The repeatability specification is based on statistical evaluation of a sample population, evaluated at 1000 Hz.

7Power-on frequencies ≤ 200 Hz. Higher power-on frequencies may result in a delay of full output accuracy or undetected target edges.

8Excludes effects caused by signature region.

OPERATING CHARACTERISTICS (continued) Valid through full operating supply voltage and ambient temperature ranges, using

Reference Target 60+2; unless otherwise specified

Characteristics

Symbol

Test Conditions

Min.

Typ.1

Max.

Unit

Performance Characteristics (continued)

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