ATS675 datasheet(4/14 Pages) ALLEGRO

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Self-Calibrating TPOS Speed Sensor IC

Optimized for Automotive Cam Sensing Applications

ATS675LSE

Allegro MicroSystems, LLC

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

OPERATING CHARACTERISTICS Valid using reference target 8X, TA,TJ, and VCC within specification, unless otherwise noted

Characteristics

Symbol

Test Conditions

Min.

Typ.1

Max.

Unit

Electrical Characteristics

Supply Voltage2

VCC

Operating, TJ < TJ(max)

3.3

–

Undervoltage Lockout

VCCUV

VCC = 0→5 V or 5→0 V

–

3.3

Supply Zener Clamp Voltage

VZSUPPLY ICC = ICC(max) + 3 mA, TA = 25°C

Supply Zener Current3

IZSUPPLY

VSUPPLY = 28 V

–

Supply Current

ICC

–

6.5

Reverse Battery Current4

IRCC

VRCC = –18 V

–

–10

Chopping Frequency

–

500

–

kHz

TEST Pin Zener Clamp Voltage5

VZTEST

–6

–

Power-On Characteristics

Power-On Time6

tPO

VCC > VCC(min), fSIG < 200 Hz

–

Output Stage Characteristics

Output Profile Polarity7

LT option, measured

as VOUT, device

electrically connected

as in figure 1

Opposite to Tooth

(Output State = On)

–

Low

–

Opposite to Valley

(Output State = Off)

–

High

–

HT option, measured

as VOUT, device

electrically connected

as in figure 1

Opposite to Tooth

(Output State = Off)

–

High

–

Opposite to Valley

(Output State = On)

–

Low

–

Output On Voltage

VOUT(SAT)

IOUT = 10 mA, Output State = On

–

400

IOUT = 15 mA, Output State = On

–

450

Output Zener Voltage

VZOUT

TA = 25°C, IOUT = 3 mA

–

Output Current Limit

IOUTLIM

Output State = On

Output Leakage Current

IOUTOFF

VOUT = 24 V, Output State = Off

–

μA

Output Rise Time

RPU = 1 kΩ, CL = 4.7 nF, VPU = 5 V

–

μs

Output Fall Time8

tf(OUT)

Measured from 90% to 10%,

TA = 25°C, RPU = 1 kΩ,

CL = 4.7 nF, (see figure 2)

VPU = 5V

0.8

1.1

1.5

μs

VPU=12V

–

1.6

–

μs

Output Fall Time Variation with

Temperature

Δtf(OUT)

Maximum variation from TA = 25°C to

–40°C and then to 150°C

–

±20

–

Output Delay Time9

td(OUT)

4 kHz sinusoidal input signal, falling electrical

edge (see figure 2)

–18

–

μs

Performance Characteristics

Operational Air Gap Range10

AGTPOS

TPOS functionality guaranteed

0.5

–

3.0

Extended Air Gap Range11

AGEXTMAX

Output switching in Running mode, TPOS

function not guaranteed

3.0

–

4.5

Analog Signal Bandwidth

Equivalent to –3 dB cutoff frequency

–

kHz

Tooth Speed

fSIG

Tooth signal frequency, sinusoidal input signal

–

8000

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