AS5047U-HTST datasheet(35/51 Pages) AMSCO

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[v1-00] 2018-Oct-30

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AS5047U − Detailed Description

Hysteresis

The hysteresis can be programmed in the HYS bits of the

SETTINGS3 register. The hysteresis can be 1, 2, or 3 LSB bits,

based on 11-bit resolution.

Figure 54:

Hysteresis Settings

Automatic Gain Control (AGC) and CORDIC

Magnitude

The AS5047U uses AGC to compensate for variations in the

magnetic field strength due to changes of temperature, air gap

between the chip and the magnet, and demagnetization of the

magnet. The automatic gain control value can be read in the

AGC field of the AGC register. Within the specified input

magnetic field strength (Bz), the Automatic Gain Control keeps

the CORDIC magnitude value (MAG) constant.

If magnetic field strength is out of specifications, the AGC has

its limits reached and the Agc-warning bit is set. When the

magnetic field strength is decreasing more then AGC can

control, the CORDIC magnitude is also decreasing.

If the CORDIC magnitude decreases lower than half of the target

magnet, the error flag MagHalf_flag is set.

HYS

Hysteresis Related to 11-Bit

ABI Resolution

AS5047U-HTST Datasheet(PDF) 35 Page - ams AG