ATS685LSH datasheet(3/15 Pages) ALLEGRO

3 / 15 page

Two-Wire, Zero Speed

Differential Gear Tooth Sensor IC

ATS685LSH

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

OPERATING CHARACTERISTICS VCC and TA within specification, unless otherwise noted

Characteristics

Symbol

Test Conditions

Min.

Typ.1

Max.

Unit2

Electrical Characteristics

Supply Voltage3

VCC

Operating, TJ < TJ(max), ICC within specification

4.0

–

Undervoltage Lockout

VCC(UV)

VCC 0 → 5 V or 5 → 0 V

–

3.5

3.95

Reverse Supply Current4

IRCC

VCC = –18 V

–

–10

Supply Zener Clamp Voltage

ICC = ICC(max) + 3 mA, TA = 25°C

–

Supply Zener Current

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

–

Test Pin Zener Clamp Voltage5

VZTEST

–6–

Power-On State Characteristics

Power-On Time6

tPO

VCC > VCC(min), fOP < 100 Hz

–

Power-On State7

POS

t > tPO

–ICC(High)

–A

Output Stage

Output Slew Rate8,9

di / dt

Δi /Δt from 90% to 10% ICC level

RSENSE = 100 Ω, CLOAD = 10 pF, no CBYPASS

–

mA/μs

Performance Characteristics

Operating Frequency

fOP

–

kHz

Analog Signal Bandwidth

–

kHz

Operate Point

BOP

% of peak-to-peak BSIG, AGOP within

specification

–70–

Release Point

BRP

% of peak-to-peak BSIG, AGOP within

specification

–30–

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)

–mV

Initial Calibration10

CALI

Rising output (current) edges, fOP < 200 Hz

–

edges

Continued on the next page…

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