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ADIS16IMU1/PCBZ 数据表(PDF) 18 Page - Analog Devices |
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ADIS16IMU1/PCBZ 数据表(HTML) 18 Page - Analog Devices |
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18 / 38 page  ADIS16486 Data Sheet Rev. 0 | Page 18 of 38 X-Axis Accelerometer (X_ACCL_LOW, X_ACCL_OUT) The X_ACCL_LOW (see Table 42 and Table 43) and X_ACCL _OUT (see Table 44 and Table 45) registers contain the accelerometer data for the x-axis. Table 42. X_ACCL_LOW Register Definition Page ID Addresses Default Access Flash Backup 0x00 0x1C, 0x1D Not applicable R No Table 43. X_ACCL_LOW Bit Definition Bits Description (No Default) [15:0] X-axis accelerometer data, low word Table 44. X_ACCL_OUT Register Definition Page ID Addresses Default Access Flash Backup 0x00 0x1E, 0x1F Not applicable R No Table 45. X_ACCL_OUT Bit Definition Bits Description (No Default) [15:0] X-axis accelerometer data, high word, twos complement, ±18 g range, 0 g = 0x0000, 1 LSB = 0.8 mg Y-Axis Accelerometer (Y_ACCL_LOW, Y_ACCL_OUT) The Y_ACCL_LOW (see Table 46 and Table 47) and Y_ACCL _OUT (see Table 48 and Table 49) registers contain the accelerometer data for the y-axis. Table 46. Y_ACCL_LOW Register Definition Page ID Addresses Default Access Flash Backup 0x00 0x20, 0x21 Not applicable R No Table 47. Y_ACCL_LOW Bit Definition Bits Description (No Default) [15:0] Y-axis accelerometer data, low word Table 48. Y_ACCL_OUT Register Definition Page ID Addresses Default Access Flash Backup 0x00 0x22, 0x23 Not applicable R No Table 49. Y_ACCL_OUT Bit Definition Bits Description (No Default) [15:0] Y-axis accelerometer data, twos complement, ±18 g range, 0 g = 0x0000, 1 LSB = 0.8 mg Z-Axis Accelerometer (Z_ACCL_LOW, Z_ACCL_OUT) The Z_ACCL_LOW (see Table 50 and Table 51) and Z_ACCL _OUT (see Table 52 and Table 53) registers contain the accelerometer data for the z-axis. Table 50. Z_ACCL_LOW Register Definition Page ID Addresses Default Access Flash Backup 0x00 0x24, 0x25 Not applicable R No Table 51. Z_ACCL_LOW Bit Definition Bits Description (No Default) [15:0] Z-axis accelerometer data, low word Table 52. Z_ACCL_OUT Register Definition Page ID Addresses Default Access Flash Backup 0x00 0x26, 0x27 Not applicable R No Table 53. Z_ACCL_OUT Bit Definition Bits Description (No Default) [15:0] Z-axis accelerometer data, high word, twos complement, ±18 g range, 0 g = 0x0000, 1 LSB = 0.8 mg Accelerometer Resolution Table 54 and Table 55 offer various numerical examples that demonstrate the format of the linear acceleration data in both 16-bit and 32-bit formats. Table 54. 16-Bit Accelerometer Data Format Examples Acceleration Decimal Hex Binary +18 g +20,000 0x4E20 0100 1110 0010 0000 +1.6 mg +2 0x0002 0000 0000 0000 0010 +0.8 mg +1 0x0001 0000 0000 0000 0001 0 mg 0 0x0000 0000 0000 0000 0000 −0.8 mg −1 0xFFFF 1111 1111 1111 1111 −1.6 mg −2 0xFFFE 1111 1111 1111 1110 −18 g −20,000 0xB1E0 1011 0001 1110 0000 Table 55. 32-Bit Accelerometer Data Format Examples Acceleration (g) Decimal Hex +18 +1,310,720,000 0x4E200000 +0.0008/215 +2 0x00000002 +0.0008/216 +1 0x00000001 0 0 0x00000000 −0.0008/216 −1 0xFFFFFFFF −0.0008/215 −2 0xFFFFFFFE −18 −1,310,720,000 0xB1E00000 DELTA ANGLES In addition to the angular rate of rotation (gyroscope) measurements around each axis (x, y, and z), the ADIS16486 provides delta angle measurements that represent a computation of angular displacement between each sample update. PIN 1 PIN 23 ΔΘY ΔΘX Z-AXIS ΔΘZ Y-AXIS X-AXIS Figure 20. Delta Angle Axis and Polarity Assignments |
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