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AS5047U-HTST bảng dữ liệu(PDF) 35 Page - ams AG |
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AS5047U-HTST bảng dữ liệu(HTML) 35 Page - ams AG |
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35 / 51 page ![]() ams Datasheet Page 35 [v1-00] 2018-Oct-30 Document Feedback 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 00 1 01 2 10 3 11 0 |
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