ADIS16IMU5SLASHPCBZ datasheet(45/46 Pages) AD

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Data Sheet

ADIS16575/ADIS16576/ADIS16577

APPLICATIONS INFORMATION

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SPI_CHKSUM Register

The SPI_CHKSUM register (Address 0x3E and Address, 0x3F)

provides a running checksum of all register data transmitted during

the current sample period. This checksum allows for validation

of arbitrary register read sequences. To use the SPI_CHKSUM

1. Read the desired registers.

2. Calculate the byte-wise sum of all received data.

3. Read and compare the value with the SPI_CHKSUM register

value.

Note that a mismatch indicates potential data corruption or a read

sequence split across multiple samples.

Best practices for SPI communication validation include the follow-

ing:

►

Regularly monitoring the SPI error bit in the DIAG_STAT register.

►

Using burst read checksums for efficient validation of bulk data

transfers.

►

Utilizing the SPI_CHKSUM register to verify the integrity of

custom register read sequences.

By employing these validation methods, users can ensure robust

and reliable SPI communication with the ADIS16575/ADIS16576/

ADIS16577 devices.

DIGITAL RESOLUTION OF GYROSCOPES AND

ACCELEROMETERS

Gyroscope Data Width (Digital Resolution)

The gyroscope data in the ADIS16575/ADIS16576/ADIS16577 is

provided in a 32-bit format, split across two 16-bit registers for

each axis (X_GYRO_UPR, X_GYRO_LWR, Y_GYRO_UPR, Y_GY-

RO_LWR, Z_GYRO_UPR, and Z_GYRO_LWR).

It is recommended to always read both the x_GYRO_UPR and

x_GYRO_LWR registers for each axis to obtain the full 32-bit gyro-

scope data. This approach ensures that the complete resolution of

the gyroscope measurements, even at full ODR, is captured.

The decimation filter (DEC_RATE register, see Table 124) and

Bartlett window filter (FILT_CTRL register, see Table 116) can

further increase the effective resolution of the gyroscope data when

applied.

Accelerometer Data Width (Digital Resolution)

The accelerometer data in the ADIS16575/ADIS16576/ADIS16577

is provided in a 32-bit format, split across two 16-bit registers

for each axis (X_ACCL_UPR, X_ACCL_LWR, Y_ACCL_UPR,

Y_ACCL_LWR, Z_ACCL_UPR, and Z_ACCL_LWR).

It is recommended to always read both x_ACCL_UPR and

x_ACCL_LWR registers for each axis to obtain the full 32-bit accel-

erometer data. This approach ensures that the complete resolution

of the accelerometer measurements, even at full ODR, is captured.

The decimation filter (DEC_RATE register, Table 124) and Bartlett

window filter (FILT_CTRL register, see Table 116) can further

increase the effective resolution of the accelerometer data when

applied.

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