ADIS16250 Analog Devices, ADIS16250 Datasheet - Page 12

• Manufacturer Part Number: ADIS16250
• Description: Programmable Low Power Gyroscope
• Manufacturer: Analog Devices

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ADIS16250
DATA OUTPUT REGISTER ACCESS
The ADIS16250 provides access to calibrated rotation
measurements, relative angle estimates, power supply
measurements, temperature measurements, and an auxiliary
12-bit ADC channel. This output data is continuously updating
internally, regardless of user read rates. The following bit map
describes the structure of all output data registers in the
ADIS16250.
Table 5. Register Bit Map
MSB
ND
D7
Table 6. Data Output Register Information
Name
ENDURANCE
SUPPLY_OUT
GYRO_OUT
AUX_ADC
TEMP_OUT
ANGL_OUT
1
Table 7. Output Coding Example, GYRO_OUT
±320°/sec Range
600°/sec
320°/sec
80°/sec
40°/sec
0.07326°/sec
0°/sec
−0.07326°/sec
−40°/sec
−80°/sec
−320°/sec
−600°/sec
1
2
Assumes that the scaling is set to 320°/sec.
Two MSBs have been masked off and are not considered in the coding.
Nominal sensitivity and zero offset null performance are assumed.
EA
D6
D13
D5
Function
Flash Memory Write Counter
Power Supply Data
Gyroscope Data
Auxiliary Analog Input Data
Sensor Temperature Data
Angle Output
D12
D4
Rate of Rotation
±160°/sec Range
300°/sec
160°/sec
40°/sec
20°/sec
0.03663°/sec
0°/sec
−0.03663°/sec
−20°/sec
−40°/sec
−160°/sec
−300°/sec
D11
D3
D10
D2
1, 2
D9
D1
Address
0x01, 0x00
0x03, 0x02
0x05, 0x04
0x0B, 0x0A
0x0D, 0x0C
0x0F, 0x0E
±80°/sec Range
150°/sec
80°/sec
20°/sec
10°/sec
0.018315°/sec
0°/sec
−0.018315°/sec
−10°/sec
−20°/sec
−80°/sec
−150°/sec
LSB
D8
D0
Rev. 0 | Page 12 of 20
Resolution (Bits)
16
12
14
12
12
14
The MSB holds the new data (ND) indicator. When the output
registers are updated with new data, the ND bit goes to a 1 state.
After the output data is read, it returns to a 0 state. The EA bit is
used to indicate a system error or an alarm condition that can
result from a number of conditions, such as a power supply that
is out of the specified operating range. See the Status and
Diagnostics section for more details. The output data is either
12 bits or 14 bits in length. For all of the 12-bit output data, the
Bit D13 and Bit D12 are assigned “don’t care” status.
The output data register map is located in Table 6 and provides
all of the necessary details for accessing each register’s data.
Table 7 displays the output coding for the GYRO_OUT register.
Figure 22 provides an example SPI read cycle for this register.
Binary Output
01 1111 1111 1111
01 0001 0001 0001
00 0100 0100 0100
00 0010 0010 0010
00 0000 0000 0001
00 0000 0000 0000
11 1111 1111 1111
11 1101 1101 1110
11 1011 1011 1100
10 1110 1111 0000
10 0000 0000 0000
Data Format
Binary
Binary
Twos Complement
Binary
Twos Complement
Binary
HEX Output
0x1FFF
0x1110
0x0444
0x0222
0x0001
0x0000
0x3FFF
0x3DDE
0x3BBC
0x2EF0
0x2000
Scale Factor
(per LSB)
1 count
1.832 mV
0.07326°/sec
0.61 mV
0.1453°C
0.03663°
Decimal
8191
4368
1092
546
1
0
−1
−546
−1092
−4368
−8192
1