Self-Calibrating TPOS Speed Sensor IC

Optimized for Automotive Cam Sensing Applications

ATS675LSE

7

Allegro MicroSystems, LLC

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Characteristic Performance

Supply Current versus Ambient Temperature

4

5

6

7

8

9

10

-50

-25

0

25

50

75

100

125

150

175

3.3

15.0

24

Output Voltage (Low) versus Ambient Temperature

0

50

100

150

200

250

300

350

400

-50

-25

0

25

50

75

100

125

150

175

20

15

10

Relative Timing Accuracy versus Air Gap

Falling Mechanical Edge, 1000 rpm, Relative to 0.5 mm Air Gap

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

1

1.5

2

2.5

3

3.5

AG (mm)

Relative Timing Accuracy versus Air Gap

Rising Mechanical Edge, 1000 rpm, Relative to 0.5 mm Air Gap

Relative Timing Accuracy versus Speed

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

1

1.5

2

2.5

3

3.5

AG (mm)

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0

500

1000

1500

2000

2500

Gear Speed (rpm)

-40

0

25

85

150

-40

0

25

85

150

Falling

Rising

Mechanical

Edge

-50

-25

0

25

50

75

100

125

150

175

Output Fall Time versus Ambient Temperature

5

12

24

3.0

2.5

2.0

1.5

1.0

0.5

0