ADIS16COM1SLASHPCBZ datasheet(27/37 Pages) AD

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Preliminary Technical Data

ADIS16000/ADIS16229

Rev. PrA | Page 27 of 37

DATA FORMAT

Table 59 and Table 60 list the bit assignments for the x_BUF

registers. The acceleration data format depends on the range

scale setting in REC_CTRL2 (see Table 30) and the recording

mode settings in REC_CTRL1 (see Table 27). Table 61 provides

some data formatting examples for the FFT mode, and Table 62

offers some data formatting examples for the16-bit, twos

complement format used in manual time mode.

Table 59. X_BUF

Low Byte Address = 0x06, Read Only

Bits

Description (Default = 0x8000)

[15:0]

X-acceleration data buffer register.

See Table 31 for scale sensitivity.

Format = twos complement (time), binary (FFT).

Table 60. Y_BUF

Low Byte Address = 0x08, Read Only

Bits

Description (Default = 0x8000)

[15:0]

Y-acceleration data buffer register.

See Table 31 for scale sensitivity.

Format = twos complement (time), binary (FFT).

Table 61. FFT Mode, 5 g Range, Data Format Examples

Acceleration (mg)

LSB

Hex

Binary

4,999.9237

65,535

0xFFFF

1111 1111 1111 1111

100 × 5 ÷ 65,536

100

0x0064

0000 0000 0110 0100

2 × 5 ÷ 65,536

0x0002

0000 0000 0000 0010

1 × 5 ÷ 65,536

0x0001

0000 0000 0000 0001

0x0000

0000 0000 0000 0000

Table 62. Manual Time Mode, 5 g Range, Data Format

Examples

Acceleration (mg)

LSB

Hex

Binary

+4999.847

+32,767

0x7FFF

1111 1111 1111 1111

~1000

+6,554

0x199A

0001 0001 10011010

+2 × 5 ÷ 32,768

0x0002

0000 0000 0000 0010

+1 × 5 ÷ 32,768

0x0001

0000 0000 0000 0001

0x0000

0000 0000 0000 0000

−1 × 5 ÷ 32,768

−1

0xFFFF

1111 1111 1111 1111

−2 × 5 ÷ 32,768

−2

0xFFFE

1111 1111 1111 1110

~−1000

−6554

0xE666

1110 0110 0110 0110

−5000

−32,768

0x8000

1000 0000 0000 0000

REAL-TIME DATA COLLECTION

When using real-time mode, select the output channel by

reading the associated x_BUF register. For example, set DIN =

0x1600 to select the y-axis sensor for sampling. After selecting

the channel, use the data-ready signal to trigger subsequent data

reading of the Y_BUF register. In this mode, use the time domain

data formatting for a range setting of 20 g, as shown in Table 31.

POWER SUPPLY/TEMPERATURE

At the end of each spectral record, the ADIS16229 also

measures power supply and internal temperature. It

accumulates a 5.12 ms record of power supply measurements at

a sample rate of 50 kHz and takes 64 samples of internal

temperature data over a period of 1.7 ms. The average of the

power supply and internal tempera-ture loads into the

SUPPLY_OUT register (see

Table 64 and Table 65) and the TEMP_OUT registers (See

Table 66 and Table 67), respectively. When using real-time

mode, these registers update only when this mode starts.

Table 63. SUPPLY_OUT

Page 0, Low Byte Address = 0x0C, Read Only

Bits

Description (Default = 0x8000)

[15:12]

Not used

[11:0]

Power supply, binary, 3.3 V = 0xA8F, 1.22 mV/LSB

Table 64. SUPPLY_OUT

Page 1- 6, Low Byte Address = 0x0A, Read Only

Bits

Description (Default = 0x8000)

[15:12]

Not used

[11:0]

Power supply, binary, 3.3 V = 0xA8F, 1.22 mV/LSB

Table 65. Power Supply Data Format Examples

Supply Level (V)

LSB

Hex

Binary

3.6

2949

0xB85

1011 1000 0101

3.3 + 0.0012207

2704

0xA90

1010 1001 0000

3.3

2703

0xA8F

1010 1000 1111

3.3 − 0.0012207

2702

0xA8E

1010 1000 1110

3.15

2580

0xA14

1010 0001 0100

Table 66. TEMP_OUT

Page 0, Low Byte Address = 0x0E, Read Only

Bits

Description (Default = 0x8000)

[15:12]

Not used

[11:0]

Temperature data, offset binary, 1278 LSB = +25°C,

−0.47°C/LSB

Table 67. TEMP_OUT

Page 1-6, Low Byte Address = 0x0C8, Read Only

Bits

Description (Default = 0x8000)

[15:12]

Not used

[11:0]

Temperature data, offset binary, 1278 LSB = +25°C,

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