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ADIS16488A Datasheet(PDF) 26 Page - Analog Devices |
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ADIS16488A Datasheet(HTML) 26 Page - Analog Devices |
26 / 35 page ![]() Product Overview Online Documentation Design Resources Discussion Sample & Buy ADIS16488A Data Sheet Rev. C | Page 26 of 35 Hard Iron Correction Table 85, Table 86, and Table 87 describe the registerformatfor the hard iron correction factors: HX, HY, and HZ. These registers use a twos complementformat.Table88 provides somenumerical examples forconverting the digital codes for theseregisters into their decimal equivalent. Table 85. HARD_IRON_X (Page2, Base Address = 0x28) Bits Description (Default = 0x0000) [15:0] X-axis magnetometer hard ironcorrection factor, HX, twos complement, ±3.2767 gauss range, 0.1 mgauss/LSB, 0 gauss = 0x0000 (see Table 88) Table 86. HARD_IRON_Y(Page 2, Base Address = 0x2A) Bits Description (Default = 0x0000) [15:0] Y-axis magnetometer hard iron correction factor, HY, twos complement, ±3.2767 gauss range, 0.1 mgauss/LSB, 0 gauss = 0x0000 (see Table 88) Table 87. HARD_IRON_Z (Page2, Base Address = 0x2C) Bits Description (Default = 0x0000) [15:0] Z-axis magnetometer hard iron correction factor, Hz, twos complement, ±3.2767 gauss range, 0.1 mgauss/LSB, 0 gauss = 0x0000 (see Table 88) Table 88. HARD_IRON_x Numerical Examples Magnetic Field Decimal Hex Binary +3.2767 gauss +32,767 0x7FFF 0111 1111 1111 1111 +0.2 mgauss +2 0x0002 0000 0000 0000 0010 +0.1 mgauss +1 0x0001 0000 0000 0000 0001 0 gauss 0 0x0000 0000 0000 0000 0000 −0.1 mgauss −1 0xFFFF 1111 1111 1111 1111 −0.2 mgauss −2 0xFFFE 1111 1111 1111 1110 −3.2768 gauss −32,768 0x8000 1000 0000 0000 0000 Soft Iron Correction Matrix The soft iron correction matrix contains correction factorsfor both sensitivity (S11, S22, S33) and alignment (S12, S13, S21, S23, S31, S32). The registers that represent each softiron correction factor are in Table 89 (S11), Table 90 (S12), Table 91 (S13), Table 92 (S21), Table 93 (S22), Table 94 (S23), Table 95 (S31), Table 96 (S32), and Table 97 (S33). Table 98 offers some numerical examples for converting between the digital codes and their effect on the magnetometer output, in terms of percent change. Table 89. SOFT_IRON_S11(Page 2, Base Address = 0x2E) Bits Description (Default = 0x0000) [15:0] Magnetometer soft iron correction factor, S11, twos complement format, see Table 98 for examples Table 90. SOFT_IRON_S12(Page 2, Base Address = 0x30) Bits Description (Default = 0x0000) [15:0] Magnetometer soft iron correction factor, S12, twos complement format, see Table 98 for examples Table 91. SOFT_IRON_S13(Page 2, Base Address = 0x32) Bits Description (Default = 0x0000) [15:0] Magnetometer soft iron correction factor, S13, twos complement format, see Table 98 for examples Table 92. SOFT_IRON_S21(Page 2, Base Address = 0x34) Bits Description (Default = 0x0000) [15:0] Magnetometer soft iron correction factor, S21, twos complement format, see Table 98 for examples Table 93. SOFT_IRON_S22(Page 2, Base Address = 0x36) Bits Description (Default = 0x0000) [15:0] Magnetometer soft iron correction factor, S22, twos complement format, see Table 98 for examples Table 94. SOFT_IRON_S23(Page 2, Base Address = 0x38) Bits Description (Default = 0x0000) [15:0] Magnetometer soft iron correction factor, S23, twos complement format, see Table 98 for examples Table 95. SOFT_IRON_S31(Page 2, Base Address = 0x3A) Bits Description (Default = 0x0000) [15:0] Magnetometer soft-ironcorrection factor, S31, twos complement format, see Table 98 for examples Table 96. SOFT_IRON_S32(Page 2, Base Address = 0x3C) Bits Description (Default = 0x0000) [15:0] Magnetometer soft iron correction factor, S32, twos complement format, see Table 98 for examples Table 97. SOFT_IRON_S33(Page 2, Base Address = 0x3E) Bits Description (Default = 0x0000) [15:0] Magnetometer soft iron correction factor, S33, twos complement format, see Table 98 for examples Table 98. SoftIronCorrection, Numerical Examples Delta (%) Decimal Hex Binary +100 – 1/216 +32,767 0x7FFF 0111 1111 1111 1111 +200/215 +2 0x0002 0000 0000 0000 0010 +100/215 +1 0x0001 0000 0000 0000 0001 0 0 0x0000 0000 0000 0000 0000 −100/215 −1 0xFFFF 1111 1111 1111 1111 −200/215 −2 0xFFFE 1111 1111 1111 1110 −100 −32,768 0x8000 1000 0000 0000 0000 |
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