ADIS16210 데이터 시트보기 (PDF) - Analog Devices

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ADIS16210

Precision Triaxial Inclinometer and Accelerometer with SPI

Analog Devices 

Data Sheet

SENSOR DATA

OUTPUT DATA REGISTERS

The ADIS16210 provides a set of output registers for three

orthogonal axes of acceleration: incline angles, internal

temperature, and power supply.

Accelerometers

The accelerometers respond to both static (gravity) and dynamic

acceleration using the polarity shown in Figure 10. XACCL_OUT

(see Table 9), YACCL_OUT (see Table 10), and ZACCL_OUT (see

Table 11) provide user access to digital calibrated accelerometer

data for each axis. For example, use DIN = 0x0400 to request the

x-axis data (XACCL_OUT). After reading the contents of one

of these registers, convert the 16-bit, twos complement number

into a decimal equivalent, and then divide that number by 16,384

to convert the measurement into units of gravity (g). Table 12

provides several examples of this data format.

Table 9. XACCL_OUT (Base Address = 0x04), Read Only

Bits

Description

[15:0] X-axis accelerometer output data, twos complement,

1 LSB = 1 g ÷ 16,384 = ~61 µg/LSB, 0 g = 0x0000

Table 10. YACCL_OUT (Base Address = 0x06), Read Only

Bits

Description

[15:0] Y-axis accelerometer output data, twos complement,

1 LSB = 1 g ÷ 16,384 = ~61 µg/LSB, 0 g = 0x0000

Table 11. ZACCL_OUT (Base Address = 0x08), Read Only

Bits

Description

[15:0] Z-axis accelerometer output data, twos complement,

1 LSB = 1 g ÷ 16,384 = ~61 µg/LSB, 0 g = 0x0000

Table 12. Accelerometer Data Format Examples

Orientation (g) Decimal Hex

Binary

+1.7

+27,853

0x6CCD 0110 1100 1100 1101

+1

+16,384

0x4000 0100 0000 0000 0000

+2/16,384

+2

0x0002 0000 0000 0000 0010

+1/16,384

+1

0x0001 0000 0000 0000 0001

0

0

0x0000 0000 0000 0000 0000

−1/16,384

−1

0xFFFF 1111 1111 1111 1111

−2/16,384

−2

0xFFFE 1111 1111 1111 1110

−1

−16,384

0xC000 1100 0000 0000 0000

−1.7

−27,853

0x9333 1001 0011 0011 0011

ADIS16210

Inclinometers

The XINCL_OUT (see Table 13), YINCL_OUT (see Table 14),

and ZINCL_OUT (see Table 15) registers provide access to

incline angle data for each axis. For example, set DIN = 0x0E00

to request y-axis data (YINCL_OUT). Use the following process to

translate the contents of these registers into degrees (°):

1. Convert the 16-bit, twos complement number into a

decimal equivalent.

2. Multiply the decimal equivalent by 180.

3. Divide the result of Step 2 by 32,768.

Table 16 provides several examples of this data format.

Table 13. XINCL_OUT (Base Address = 0x0C), Read Only

Bits

Description

[15:0] X-axis inclinometer output data, binary,

0° = 0x0000, 1 LSB = 180°/32,768 = ~0.0055°/LSB

Table 14. YINCL_OUT (Base Address = 0x0E), Read Only

Bits

Description

[15:0] Y-axis inclinometer output data, binary,

0° = 0x0000, 1 LSB = 180°/32,768 = ~0.055°/LSB

Table 15. ZINCL_OUT (Base Address = 0x10), Read Only

Bits

Description

[15:0] Z-axis inclinometer output data, binary,

0° = 0x0000, 1 LSB = 180°/32,768 = ~0.0055°/LSB

Table 16. Incline Angle Data Format Examples

Orientation Decimal Hex

Binary

+179.9945°

+32,767

0x7FFF 0111 1111 1111 1111

+0.011°

+2

0x0002 0000 0000 0000 0010

+0.0055°

+1

0x0001 0000 0000 0000 0001

0°

0

0x0000 0000 0000 0000 0000

−0.0055°

−1

0xFFFF 1111 1111 1111 1111

−0.011°

−2

0xFFFE 1111 1111 1111 1110

−180°

−32,768

0x8000 1000 0000 0000 0000

Figure 10 through Figure 15 provide orientation examples and

the associated output values for each accelerometer and incli-

nometer register. These examples assume the factory default

configuration for the gravity vector (z-axis, pointed up). See the

MSC_CTRL (see Table 30) for additional options for gravity

vector definitions.

Rev. E | Page 9 of 20

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