Position Sensor IC

with Speed and Direction Output

ATS696PSM

6

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Characteristics

Symbol

Note

Min.

Typ.

Max.

Unit

PERFORMANCE CHARACTERISTICS (continued)

Cycle to Cycle Variation

region; see Figure 6

0.9

–

1.1

–

Signature Amplification Ratio

signature region; see Figure 6

0.8

–

2.0

–

Vibration Tolerance During

Calibration

Periods of single-direction rotation required to

provide correct output after start-up vibration is

–

–

3

periods

(tooth-valley

pairs)

Initial Calibration Interval

–

–

4

output

pulse

–

–

9

output

pulse

First Output Edge

–

–

–

MAGNETIC CHARACTERISTICS

Minimum Differential Magnetic

Input Signal

Minimum required Speed Channel peak-to-peak

differential signal

–

–

G

Operating Magnetic Input Range

Allowable differential magnetic input range

–700

–

700

G

Back-Biasing Magnetic Field

–2500

–

2500

G

TARGET CHARACTERISTICS

Required Direction Channel

Separation

Measured between the two

direction channels;

Measurement is made on

normalized (0 to 100%)

differential magnetic signals

(see Target Definition section)

Opposite

switching

feature,

measured at

BST on Speed

Channel,

See Figure 10

–

–

%

Opposite

non-switching

feature

–

–

%

[6]

Incorrect Direction Pulses may be given during vibration events.

[7]

For startup hysteresis ≥50 G, the minimum differential signal required is equal to the startup hysteresis selection; see Programmable Options Table..

[8]

Assumes Standard target option. For Wide tooth programmable option, minimum required Direction channel separation opposite a switching feature is 25%;

see Programmable Options Table.

[9]