ADIS16250

Rev. 0 | Page 12 of 20

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

LSB

ND

EA

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

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.

Table 6. Data Output Register Information

Name

Function

Address

Resolution (Bits)

Data Format

Scale Factor

(per LSB)

ENDURANCE

Flash Memory Write Counter

0x01, 0x00

16

Binary

1 count

SUPPLY_OUT

Power Supply Data

0x03, 0x02

12

Binary

1.832 mV

GYRO_OUT

Gyroscope Data

0x05, 0x04

14

Twos Complement

AUX_ADC

Auxiliary Analog Input Data

0x0B, 0x0A

12

Binary

0.61 mV

TEMP_OUT

Sensor Temperature Data

0x0D, 0x0C

12

Twos Complement

0.1453°C

ANGL_OUT

Angle Output

0x0F, 0x0E

14

Binary

0.03663°

Rate of Rotation

±320°/sec Range

±160°/sec Range

±80°/sec Range

Binary Output

HEX Output

Decimal

600°/sec

300°/sec

150°/sec

01 1111 1111 1111

0x1FFF

8191

320°/sec

160°/sec

80°/sec

01 0001 0001 0001

0x1110

4368

80°/sec

40°/sec

20°/sec

00 0100 0100 0100

0x0444

1092

40°/sec

20°/sec

10°/sec

00 0010 0010 0010

0x0222

546

0.07326°/sec

0.03663°/sec

0.018315°/sec

00 0000 0000 0001

0x0001

1

0°/sec

0°/sec

0°/sec

00 0000 0000 0000

0x0000

0

−0.07326°/sec

−0.03663°/sec

−0.018315°/sec

11 1111 1111 1111

0x3FFF

−1

−40°/sec

−20°/sec

−10°/sec

11 1101 1101 1110

0x3DDE

−546

−80°/sec

−40°/sec

−20°/sec

11 1011 1011 1100

0x3BBC

−1092

−320°/sec

−160°/sec

−80°/sec

10 1110 1111 0000

0x2EF0

−4368

−600°/sec

−300°/sec

−150°/sec

10 0000 0000 0000

0x2000

−8192