ATS692LSH datasheet(4/12 Pages) ALLEGRO

4 / 12 page

Two-Wire, Differential, Vibration Resistant

Sensor IC with Speed and Direction Output

ATS692LSH(RSNPH)

Allegro MicroSystems, LLC

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

OPERATING CHARACTERISTICS (continued) Valid at throughout full operating and temperature ranges; using Reference Target

60-0; unless otherwise specified

Characteristic

Symbol

Test Conditions

Min.

Typ.1

Max.

Unit

Input Magnetic Characteristics

Allowable Differential Sequential

Signal Variation7

BSEQ(n+1) /

BSEQ(n)

Signal cycle-to-cycle variation (see figure 2)

0.6

–

Calibration

First Direction Output Pulse8

Amount of target rotation

(constant direction) following

power-on until first electrical

output pulse of either tw(FWD)

or tw(REV), see figure 1

AG ≥ 0.5 mm

AG < 2.25 mm

–

2 ×

TTARGET

< 3 ×

TTARGET

deg.

AG ≥ 2.25 mm

AG ≤ 2.75 mm

–

2.5 ×

TTARGET

< 4 ×

TTARGET

deg.

First Direction Pulse Output Following

Direction Change

NCD

Amount of target rotation (constant direction)

following event until first electrical output pulse

of either tw(FWD) or tw(REV), see figure 1

1 ×

TTARGET

2 ×

TTARGET

< 3 ×

TTARGET

deg.

First Direction Pulse Output Following

Running Mode Vibration

Amount of target rotation (constant direction)

following event until first electrical output pulse

of either tw(FWD) or tw(REV), see figure 1

1 ×

TTARGET

2 ×

TTARGET

< 3 ×

TTARGET

deg.

1Typical values are at TA = 25°C and VCC = 12 V. Performance may vary for individual units, within the specified maximum and minimum limits.

2Maximum voltage must be adjusted for power dissipation and junction temperature; see Power Derating section.

3Negative current is defined as conventional current coming out of (sourced from) the specified device terminal.

4Sustained voltages beyond the clamp voltage may cause permanent damage to the IC.

5Load circuit is RL = 100 Ω and CL = 10 pF. Pulse duration measured at a threshold of (ICC(HIGH) + ICC(LOW)) / 2.

6Maximums of both Operating Frequency (Reverse Rotation) and Operating Frequency (Non-Direction Pulses) are determined by satisfactory

separation of output pulses: ICC(LOW) of tw(FWD)(min). If the customer can resolve lower low-state durations, maximum fREV and fND may be increased.

7If the minimum signal phase separation is not maintained during or after a signal variation event, output may be blanked or non-direction pulses may

occur. A signal variation event during power-on may increase the quantity of edges required to get correct direction pulses.

8Power-on frequency ≤ 200 Hz. Higher power-on frequencies may require more input magnetic cycles until directional output pulses are achieved.

VPROC

Target

TVPROC

VPROC = the processed analog signal of the sinusoidal magnetic input (per channel)

TTARGET = period between successive sensed target mechanical edges of the same

orientation (either both rising or both falling)

TTARGET

Valley

Tooth

Figure 1. Definition of TTARGET

Figure 2. Differential signal variation

BSEQ(n+1)

BSEQ(n)

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