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4 Magnet Dimensions

Figure 1:

MS12-250 strip dimensions

L = 300

L =2.4

S

1

2

3

4

5

6

249

250

T = 1.2

8

7

recommended

scanning path

247

248

N

N

S

N

S

N

S

N

S

N

S

Alignment of Magnet Strip and Sensor IC

When aligning the magnet strip to the AS5306 sensor IC, the centerline of the magnet strip should be placed

exactly over the Hall array. See Figure 2 for the position of the Hall array relative to Pin #1.

Vertical Distance

The vertical distance between the magnet strip and the top of the IC package should be

≤ 0.4mm. Note that the

vertical distance depends on the strength of the magnet. The AS5306 automatically adjusts for fluctuating magnet

strength by using an automatic gain control (AGC). There are several indicators for proper magnetic field strength

available with the AS5306. The vertical distance should be set such that

the AO voltage is between 1.0 and 4.0V.

See the AS5306 datasheet for more details.

See also Error! Reference source not found. for measurement data of the MS12-250 magnetic strip.

Lateral Stroke

The lateral movement range (stroke) can cover the active area of the magnetic strip (see Figure 1) as long as all

Hall sensors of the IC are covered by the magnet. The Hall array on the AS5306 has a length of 2.0mm, hence the

total stroke is

Stroke = Length of active area – length of Hal array = 300.0mm – 2.0mm = 298.0mm