ADIS16334/PCBZ Analog Devices Inc, ADIS16334/PCBZ Datasheet - Page 13

• Manufacturer Part Number: ADIS16334/PCBZ
• Description: ADIS16334/PCB EVAL. BD. PB Free
• Manufacturer: Analog Devices Inc
• Series: iSensor™r

Specifications of ADIS16334/PCBZ

• Sensor Type: Gyroscope, 3 Axis
• Sensing Range: ±75 ~ 300°/s
• Interface: Serial
• Sensitivity: 0.0125°/sec/LSB
• Embedded: No
• Utilized Ic / Part: ADIS16334
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Internal Temperature Measurements
The TEMP_OUT register provides relative temperature
measurements for inside of the ADIS16334. This measurement
can be above ambient temperature and does not reflect external
conditions. Table 14 provides the bit assignments for this register,
along with the digital data format. Table 15 provides several
examples for converting the 12-bit, offset binary data into
temperature measurements.
Table 14. Temperature Register Bit Assignments
Bit(s)
[15]
[14]
[13:12]
[11:0]
Table 15. Temperature, Twos Complement Format
Temperature
+105°C
+85°C
+25.1537°C
+25.06785°C
+25°C
+24.93215°C
+24.8643°C
−40°C
Description
New data, 1 = new data since last read access
Error/alarm
Not used
Temperature output data, offset binary format,
typical sensitivity = 0.06785°/LSB, 25°C = 0x0000
Decimal
+1179 LSB
+884 LSB
+2 LSB
+1 LSB
0 LSB
−1 LSB
−2 LSB
−958 LSB
Hex
0x49B
0x374
0x002
0x001
0x000
0xFFF
0xFFE
0xC42
Binary
XXXX 0100 1001 1011
XXXX 0011 0111 0100
XXXX 0000 0000 0010
XXXX 0000 0000 0001
XXXX 0000 0000 0000
XXXX 1111 1111 1111
XXXX 1111 1111 1110
XXXX 1100 0100 0010
Rev. 0 | Page 13 of 20
DEVICE CONFIGURATION
The control registers in Table 8 provide users with a variety of
configuration options. The SPI provides access to these registers,
one byte at a time, using the bit assignments in Figure 14. Each
register has 16 bits, where Bits[7:0] represent the lower address,
and Bits[15:8] represent the upper address. Figure 16 provides
an example of writing 0x03 to Address 0x37 (SMPL_PRD[15:8]),
using DIN = 0xB703. This example reduces the sample rate by
a factor of eight (see Table 17).
Dual Memory Structure
Writing configuration data to a control register updates its SRAM
contents, which are volatile. After optimizing each relevant
control register setting in a system, set GLOB_CMD[3] = 1
(DIN = 0xBE08) to back these settings up in nonvolatile flash
memory. The flash backup process requires a valid power supply
level for the entire 75 ms process time. The user register map in
Table 8 provides a column that indicates the registers that have
flash back-up support. A yes in the Flash Backup column indicates
that a register has a mirror location in flash and, when backed
up properly, it automatically restores itself during startup or
after a reset. Figure 17 provides a diagram of the dual-memory
structure used to manage operation and store critical user settings.
SCLK
DIN = 1011 0111 0000 0011 = 0xB703, WRITES “0x03” TO ADDRESS “0x37.”
DIN
CS
(NO SPI ACCESS)
FLASH MEMORY
NONVOLATILE
Figure 17. SRAM and Flash Memory Diagram
Figure 16. Example SPI Write Sequence
START-UP
MANUAL
BACKUP
FLASH
RESET
SPI ACCESS
VOLATILE
SRAM
ADIS16334