ATS684LSN datasheet(3/16 Pages) ALLEGRO

3 / 16 page

Two-Wire, Zero-Speed

Differential Gear Tooth Sensor IC

ATS684LSN

Allegro MicroSystems, LLC

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Characteristics

Symbol

Test Conditions

Min.

Typ.[1]

Max.

Unit[2]

ELECTRICAL CHARACTERISTICS

Supply Voltage[3]

VCC

Operating, TJ < TJ(max), required across pin 1

to pin 3

4.0

–

Undervoltage Lockout

VCC(UV)

VCC 0 → 5 V or 5 → 0 V

–

3.5

3.95

Reverse Supply Current[4]

IRCC

VCC = VRCC (MAX)

–

–10

Supply Zener Clamp Voltage

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

–

Supply Zener Current

IZSUPPLY TA = 25°C, VCC = 28 V

–

Supply Current

ICC(Low)

Low-current state

ICC(High) High-current state

Supply Current Ratio

ICC(High)

/ ICC(Low)

Ratio of high current to low current

1.85

–

3.05

–

POWER-ON STATE CHARACTERISTICS

Power-On Time[5]

tPO

VCC > VCC(min), fOP < 100 Hz

–

Power-On State[6]

POS

t > tPO

–

ICC(High)

–

OUTPUT STAGE

Output Rise Time[7]

Corresponds to measured output slew rate, from

10% to 90% ICC level

CSUPPLY, RSENSE = 100 Ω

μs

Output Fall Time[7]

Corresponds to measured output slew rate, from

90% to 10% ICC level

CSUPPLY, RSENSE = 100 Ω

μs

PERFORMANCE CHARACTERISTICS

Operating Frequency

fOP

–

kHz

Analog Signal Bandwidth

–

kHz

Operate Point

BOP

% of peak-to-peak BSIG, AGOP within

specification

–

Release Point

BRP

% of peak-to-peak BSIG, AGOP within

specification

–

Running Mode Lockout Enable

Threshold

VLOE(RM)

At peak-to-peak VPROC < VLOE(RM), output

switching disables

–

170

–

Running Mode Lockout Release

Threshold

VLOR(RM)

At peak-to-peak VPROC > VLOR(RM), output

switching enables

–

200

–

CALIBRATION

Start Mode Hysteresis

POHYS

–

VLOR(RM)

–

Initial Calibration[8]

CALI

Rising output (current) edges, fOP < 200 Hz

–

edges

Continued on the next page…

OPERATING CHARACTERISTICS: VCC and TA within specif ication, unless otherwise noted

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