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PDF ADIS16255 Data sheet ( Hoja de datos )
| Número de pieza | ADIS16255 | |
| Descripción | Programmable Low Power Gyroscope | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Preliminary Technical Data
Programmable Low Power Gyroscope
with Temperature Compensation
ADIS16255
FEATURES
Yaw rate gyro with digital range scaling
±80°/sec, ±160°/sec, and ±320°/sec settings
14-bit digital gyroscope sensor outputs
12-bit digital temperature sensor output
Calibrated sensitivity and bias
Extended temperature range
In-system, auto-zero for bias drift calibration
Digitally controlled sample rate
Digitally controlled frequency response
Dual alarm settings with rate/threshold limits
Embedded integration for short-term angle estimates
Digitally activated self-test
Digitally activated low power mode
Interrupt-driven wake-up
SPI®-compatible serial interface
52 Hz Sensor Bandwidth
Auxiliary 12-bit ADC input and 12-bit DAC output
Auxiliary digital input/output
Single-supply operation: 4.75 V to 5.25 V
2000 g powered shock survivability
APPLICATIONS
Instrumentation control
Platform control and stabilization
Motion control and analysis
Avionics instrumentation
Navigation
Image stabilization
Robotics
GENERAL DESCRIPTION
The ADIS16255 is a complete, angular rate measurement
system available in a single compact package enabled by Analog
Devices iSensor™ integration. By enhancing Analog Devices
iMEMS® sensor technology with an embedded signal processing
solution, the ADIS16255 provides factory calibrated and
tunable digital sensor data in a convenient format that can be
accessed using a simple SPI serial interface. The ADIS16255
provides calibration over an extended temperature range. The
SPI interface provides access to measurements for the gyroscope,
temperature, power supply, and one auxiliary analog input. Easy
access to calibrated digital sensor data provides developers with
a system-ready device, reducing development time, cost, and
program risk.
The device range can be digitally selected from three different
settings: ±80°/sec, ±160°/sec, and ±320°/sec. Unique
Rev. PrA
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
RATE
FILT
VCC
COM
FUNCTIONAL BLOCK DIAGRAM
AUX AUX
ADC DAC VREF
TEMPERATURE
SENSOR
ADIS16250
GYROSCOPE
SENSOR
SELF-TEST
SIGNAL
CONDITIONING
AND
CONVERSION
CALIBRATION
AND
DIGITAL
PROCESSING
DIGITAL
CONTROL
SPI
PORT
CS
SCLK
DIN
DOUT
POWER
MANAGEMENT
ALARM
AUXILIARY
I/O
RST
Figure 1.
DIO0 DIO1
characteristics of the end system are accommodated easily
through several built-in features, including a single-command
auto-zero recalibration function, as well as configurable sample
rate and frequency response. Additional features can be used to
further reduce system complexity, including:
• Configurable alarm function
• Auxiliary 12-bit ADC and DAC
• Two configurable digital I/O ports
• Digital self-test function.
System power dissipation can be optimized via the ADIS16255
power management features, including an interrupt-driven
wake-up. The ADIS16255 is available in an 11 mm × 11 mm ×
5.5 mm, laminate-based land grid array (LGA) package with a
temperature range of −40°C to +85°C.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
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Preliminary Technical Data
TIMING SPECIFICATIONS
TA = −40°C to +85°C, VCC = 5.0 V, unless otherwise noted.
Table 2.
Parameter
fSCLK
tDATARATE
tDATARATE
tcs
tDAV
tDSU
tDHD
tDF
tDR
tSFS
Description
Fast mode2
Normal mode2
Chip select period, fast mode3
Chip select period, normal mode3
Chip select to clock edge
Data output valid after SCLK edge
Data input setup time before SCLK rising edge
Data input hold time after SCLK rising edge
Data output fall time
Data output rise time
CS high after SCLK edge
1 Guaranteed by design, typical specifications are not tested or guaranteed.
2 Based upon sample rate selection.
3 This number can be used to calculate tSTALL number in Figure 2
CS
SCLK
tDATA RATE
tSTALL
Figure 2. SPI Chip Select Timing
Min1
0.01
0.01
40
100
48.8
24.4
48.8
5
ADIS16255
Typ
Max1
Unit
2.5 MHz
1.0 MHz
μs
μs
ns
100 ns
ns
ns
5 12.5 ns min
5 12.5 ns min
ns typ
CS
SCLK
DOUT
DIN
tCS
1
MSB
W/R
23 4 56
tDAV
DB14
tDSU
DB13
DB12
tDHD
DB11
DB10
A5 A4 A3 A2
15 16
tSFS
DB2
DB1
LSB
D2 D1 LSB
Figure 3. SPI Timing
(Utilizing SPI Settings Typically Identified as Phase = 1, Polarity = 1)
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Rev. PrA | Page 5 of 20
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Preliminary Technical Data
DATA OUTPUT REGISTER ACCESS
The ADIS16255 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
ADIS16255.
Table 5. Register Bit Map
MSB LSB
ND EA D13 D12 D11 D10 D9 D8
D7 D6 D5 D4 D3 D2 D1 D0
Table 6 and provides all of the necessary details for accessing
each register’s data. Table 7 displays the output coding for the
ADIS16255
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
D13 bit and the D12 bit are assigned “don’t care” status.
The output data register map is located in
GYRO_OUT register. Figure 16 provides an example SPI read
cycle for this register.
Table 6. Data Output Register Information
Name
ENDURANCE
SUPPLY_OUT
GYRO_OUT
AUX_ADC
TEMP_OUT
ANGL_OUT
Function
Flash Memory Write Counter
Power Supply Data
Gyroscope Data
Auxiliary Analog Input Data
Sensor Temperature Data
Angle Output
Address
0x01, 0x00
0×03, 0×02
0×05, 0×04
0×0B, 0×0A
0×0D, 0×0C
0×0F, 0×0E
Resolution (Bits)
16
12
14
12
12
14
Data Format
Binary
Binary
Twos Complement
Binary
Twos Complement
Binary
Scale Factor
(per LSB)
N/A
1.832 mV
0.07326°/sec1
0.61 mV
+0.1453°C
0.03663°
Table 7. Output Coding Example, GYRO_OUT2, 3
Rate of Rotation
±320°/sec Range
±160°/sec Range
600°/sec
300°/sec
320°/sec
160°/sec
80°/sec
40°/sec
40°/sec
20°/sec
0.07326°/sec
0.03663°/sec
0°/sec
0°/sec
−0.07326°/sec
−0.03663°/sec
−40°/sec
−20°/sec
−80°/sec
−40°/sec
−320°/sec
−160°/sec
−600°/sec
−300°/sec
±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
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
HEX Output
0x1FFF
0x1110
0x0444
0x0222
0x0001
0x0000
0x3FFF
0x3DDE
0x3BBC
0x2EF0
0x2000
Decimal
8191
4368
1092
546
1
0
−1
−546
−1092
−4368
−8192
1 Assumes that the scaling is set to 320°/sec.
2 Two MSBs have been masked off and are not considered in the coding.
3 Nominal sensitivity and zero offset null performance are assumed.
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Rev. PrA | Page 11 of 20
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet ADIS16255.PDF ] | |
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