Page 44

ams Datasheet

Document Feedback

[v2-04] 2015-Oct-07

AS5410 − Magnet Features

Magnet Range Extension

If the magnet is far away from the sensor, the field vectors in

the sensor position can generate false angle information. By

exploiting the magnetic field behavior it is still possible to

calculate correct position information. As absolute field values

are used during this calculation external disturbance fields

must not exceed a maximum of approximately ten times the

terrestrial magnetic field. The position range extending

calculation method can be disabled if large disturbance fields

occur during operation.

MgRangExt = 0: Angles between -180° and +180° can be

measured

MgRangExt = 1: Angles between -288° and +288° can be

measured

Figure 50:

Register 000Bh

Note(s) and/or Footnote(s):

1. Pins LOCK_N and SCE are test pins for factory testing. They must be connected to VSS in normal operation to prevent accidental

enabling of a test mode

2. Output READY is set high when a measurement cycle is completed and the results in the output registers are valid. It is cleared by

reading data from address 0100h or 0122h

3. CLK allows monitoring of the internal clock or applying an external clock.

4. Output MISO is only activated when CS_N is low. It is in high impedance state otherwise, this allows parallel operation of multiple ICs.

5. CS_N is active low and activates data transmission. If only a single device is used, CS_N may remain low for several commands, for

example while reading the output registers.

Register

Access

Bit

Function

Note

000Bh:

Sequencer

control

R/W

D11

MgRangExt

“Magnet Range Extension”

Enable the algorithm for an extended position

range.

D10

CoordSel

“Coordinate System Selection”

1 = The sign of the LinAng (Register 0122h) gets

changed if MagDir (Register 000Bh) = 1

0 = LinAng (Register 0122h) gets not changed

Magnet Features