ATS672LSB_03 datasheet(4/15 Pages) ALLEGRO

4 / 15 page

30Dec03, Rev. 1.42

Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

Self-Calibrating Gear Tooth Sensor with 9-Bit Signal Capture

ATS672LSB

OPERATING CHARACTERISTICS Valid at Ta = –40ºC to 150ºC, and VCC within speciﬁcation, unless otherwise noted

Characteristics

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Electrical Characteristics

Supply Voltage

VCC

Operating; TJ < TJ(max)

3.3

–

26.5

Reverse Supply Voltage

VRCC

IRCC = –5 mA, maximum

–

–18

Supply Zener Clamp Voltage

VZSupply ICC = 14 mA (≈ICC(max) + 3 mA); TA = 25°C

–

Output Zener Clamp Voltage

VZOutput IOUT = 3 mA; TA = 25°C

–

Supply Zener Current

IZSupply Test conditions only; VCC = 28 V

–

ICC(max) + 3 mA

Output Zener Current

IZOutput VOUT = 30 V

–

Supply Current

ICC

Output = OFF

6.5

Output = ON

6.5

Power-On State Characteristics

Power-On Time

tPO

Gear Speed < 100 RPM; VCC > 3.3 V

–

500

µs

Undervoltage Lockout

VUV

–

< VCC(min)

Output Stage

Low Output Voltage

VLOUT ISINK = 15 mA, Output = ON

–

0.2

0.45

Output Current Limit

Ilim

Output = ON; TJ < TJ(max)

Output Leakage Current

IOFF

Output = OFF; VOUT = VCC(max)

–

µA

Output Rise Time

RLOAD = 500 Ω; CLOAD = 10 pF; TA = 25°C

–

0.9

µs

Output Fall Time

RLOAD = 500 Ω; CLOAD = 10 pF; TA = 25°C

–

0.5

µs

Switch Point Characteristics

Tooth Speed

Smax

–

kHz

Bandwidth

f – 3 dB

–

kHz

Operate Point

BOP

% of peak-to-peak, referenced to tooth sensing signal;

AG < AGMax

–30

–

Release Point

BRP

% of peak-to-peak, referenced to tooth sensing signal;

AG < AGMax

–40

–

Output Polarity

VOUT

Valley opposite the sensor

–

HIGH

–

Tooth opposite the sensor

–

LOW

–

Calibration

Initial Calibration

Number of rising mechanical edges on the target that

are required for accurate edge detection

–2

AGC Disable

Number of rising mechanical edges on the target that

are required to complete the AGC calibration

––

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