ADIS16203 Analog Devices, Inc., ADIS16203 Datasheet - Page 13

• Manufacturer Part Number: ADIS16203
• Description: Programmable 360 Inclinometer
• Manufacturer: Analog Devices, Inc.

DATA OUTPUT REGISTER ACCESS
The ADIS16203 provides access to two calibrated incline-angle
measurements (+360° and ±180° output formats), 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 follow bit map describes
the structure of all output data registers in the ADIS16203.
MSB
ND
D7
Table 6. Data Output Register Information
Name
SUPPLY_OUT
AUX_ADC
TEMP_OUT
INCL_OUT
INCL_180_OUT
Table 7. Output Coding Example, INCL_180_OUT
Acceleration Level
+170.10°
+93.05°
+0.625°
0.00°
−0.625
−93.05°
−170.10°
1
2
Two MSBs have been masked off and are not considered in the coding.
Nominal sensitivity (0.025°/LSB) and zero offset null performance are assumed.
EA
D6
D13
D5
Auxiliary analog input data
Inclination data
Function
Power supply data
Sensor temperature data
±180° inclination data
W/R BIT = 0
D12
D4
SCLK
DIN
CS
D11
D3
Binary Output
01 1010 1001 0100
00 1110 1000 1010
00 0000 0001 1001
00 0000 0000 0000
11 1111 1110 0111
11 0001 0111 0110
11 1100 0001 1000
ADDRESS = 001111
Figure 28. SPI Sequence Reading INCL_OUT When Incline Angle = 93.05°
D10
D2
D9
D1
0x0D, 0x0C
Address
0x03, 0x02
0x09, 0x08
0x0B, 0x0A
0x0F, 0x0E
1, 2
LSB
D8
D0
Rev. 0 | Page 13 of 28
W/R BIT = 0
DOUT
Resolution
(Bits)
12
12
12
14
14
Hex Output
0x1A94
0x0E8A
0x0019
0x0000
0x3FE7
0x3176
0x256C
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 an alarm condition, which could result from a
number of conditions, such as a power supply that is out of the
specified operating range. See the Alarms section for more details.
The output data is either 12 or 14 bits in length. For all of the 12-bit
output data, the D13 and D12 bits 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 ±180° output data register,
INCL_180_OUT, and Figure 28 displays a timing diagram
example for reading this register.
ADDRESS = 001111 OR 0x0F
DATA = 1000111010001010
NEW DATA, NO ALARM, INCL_180_OUT = +93.05°
Data
Format
Binary
Binary
Binary
Binary
Twos complement
Decimal
+6804
+3722
+25
0
−25
−3722
−6804
Scale Factor
(per LSB)
1.22 mV
0.61 mV
−0.47°C
0.025°
0.025°
ADIS16203