ADIS16488 datasheet(26/36 Pages) AD

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ADIS16488

Data Sheet

Rev. B | Page 26 of 36

BAROMETERS

The BR_BIAS_HIGH register (see Table 98) and

BR_BIAS_LOW register (Table 99) provide an offset

control function and use the same format as the output

registers, BAROM_OUT and BAROM_LOW.

Table 98. BR_BIAS_HIGH (Page 2, Base Address = 0x42)

Bits

Description (Default = 0x0000)

[15:0]

Barometric pressure bias correction factor, high word

Twos complement, ±1.3 bar measurement range,

0 bar = 0x0000, 1 LSB = 40 µbar

Table 99. BR_BIAS_LOW (Page 2, Base Address = 0x40)

Bits

Description (Default = 0x0000)

[15:0]

Barometric pressure bias correction factor, low word

Twos complement, ±1.3 bar measurement range,

0 bar = 0x0000, 1 LSB = 40 µbar ÷ 216 = ~0.00061 µbar

RESTORING FACTORY CALIBRATION

Turn to Page 3 (DIN = 0x8003) and set GLOB_CMD[6] = 1

(DIN = 0xA240, DIN = 0xA300) to execute the factory

calibration restore function. This function resets each user

calibration register to zero, resets all sensor data to 0, and

automatically updates the flash memory within 72 ms. See

Table 114 for more information on GLOB_CMD.

POINT OF PERCUSSION ALIGNMENT

CONFIG[6] offers a point of percussion alignment function

that maps the accelerometer sensors to the corner of the package

identified in Figure 24. To activate this feature, turn to Page 3

(DIN = 0x8003), then set CONFIG[6] = 1 (DIN = 0x8A40,

DIN = 0x8B00). See Table 74 for more information on the

CONFIG register.

PIN 1

PIN 23

POINT OF PERCUSSION

ALIGNMENT REFERENCE POINT.

SEE CONFIG[6].

Figure 24. Point of Percussion Reference Point

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