ADIS16120 Low Noise, Angular Rate Sensor (Rev. B)

Document overview

  • Manufacturer or author: Analog Devices, Inc.
  • PDF pages: 12

Technical content

Low Noise, Angular Rate Sensor ADIS16120 Rev. B 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. Trademarks and registered trademarks are the property of their respective owners. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006–2007 Analog Devices, Inc. All rights reserved.

FEATURES

Low noise density: 0.015o/sec/√Hz ±300o/sec dynamic range Z-axis, yaw rate response Calibrated offset and sensitivity

320 Hz bandwidth, adjustable

Embedded temperature sensor output Precision voltage reference output

5 V single-supply operation

−40°C to +85°C temperature range

APPLICATIONS

Inertial measurement units (IMU) Stabilization GENERAL DESCRIPTION The ADIS16120 is a low noise, angular rate sensor (gyroscope) that includes all of the necessary embedded signal conditioning to provide a low noise, analog output over the complete dynamic range of ±300 o/sec. Factory calibration provides excellent offset and gain accuracy. The unique design implementation provides superior stability over variations in temperature, voltage, linear acceleration, vibration, and next level assembly. The surface- micromachining manufacturing technology is the same high volume BiMOS process used by Analog Devices, Inc., for its high reliability automotive sensor products. The output signal, RATEOUT, is a voltage proportional to the angular rate about the axis that is normal to the top surface of the package. A precision reference and a temperature output are provided for system-level calibrations and a digital self-test feature is provided to enable system-level diagnostics. The self- test function electromechanically excites the sensor to verify proper operation. The 35.6 mm × 42.4 mm (plus mounting extensions) package provides the convenience of a standard geometry 24-pin interface and four mounting holes for simple installation. FUNCTIONAL BLOCK DIAGRAM TEMPOUT REFOUT RATEOUT FILTER ST TEMPERATURE SENSOR SELF-TEST SIGNAL CONDITIONING SENSITIVITY AND OFFSET CALIBRATION MEMS ANGULAR RATE SENSOR COM ADIS16120 05923-001 Figure 1.

Rev. B | Page 2 of 12 TABLE OF CONTENTS

REVISION HISTORY

11/07—Rev. A to Rev. B 11/06—Rev. 0 to Rev. A 7/06—Revision 0: Initial Version

Rev. B | Page 3 of 12 SPECIFICATIONS TA = 25°C, VCC = 5 V , angular rate = 0°/sec, COUT = 0 μF, ±1 g, unless otherwise noted. Table 1. Parameter Conditions Min1 Typ Max1 Unit SENSITIVITY Clockwise rotation is positive output Dynamic Range2 Full-scale range over specified operating conditions ±300 Degrees/sec Initial 25°C 4.95 5 5.05 mV/degrees/sec Over Temperature3 4.75 5 5.25 mV/degrees/sec Nonlinearity Best fit straight line 0.04 % of FS NULL Initial Null 2.49 2.50 2.51 V Over Temperature VS = 4.75 V to 5.25 V 2.4 2.6 V In Run Bias Stability 1 σ @ 25°C 0.005 Degrees/sec Angle Random Walk 1 σ @ 25°C 0.9 Degrees/sec/√hr Turn-On Time Power on to ±0.5°/sec of final value, 80 Hz bandwidth 35 ms Linear Acceleration Effect Any axis 0.05 Degrees/sec/g Voltage Sensitivity VCC = 4.75 V to 5.25 V 0.4 Degrees/sec/V NOISE PERFORMANCE Rate Noise Density4 25°C 0.015 0.020 Degrees/sec/√Hz FREQUENCY RESPONSE 3 dB Bandwidth5 No external capacitance 320 Hz Sensor Resonant Frequency 14 kHz SELF-TEST INPUTS ST RATEOUT Response6 ST pin from Logic 0 to Logic 1 175 270 365 mV Logic 1 Input Voltage Standard high logic level definition 3.3 V Logic 0 Input Voltage Standard low logic level definition 1.7 V Input Impedance To common 3.13 kΩ TEMPERATURE SENSOR VOUT at 298 K 2.50 V Max Current Load on Pin Source to common 50 μA Scale Factor Proportional to absolute temperature 8.4 mV/K OUTPUT DRIVE CAPABILITY Output Voltage Swing IOUT = ±1 mA 0.25 VS − 0.25 V Capacitive Load Drive7 1000 pF

2.5 V REFERENCE

Voltage Value 2.45 2.5 2.55 V Load Drive to Ground Source 150 μA Load Regulation 0 μA < IOUT < 200 μA 5 mV/mA Power Supply Rejection 4.75 VS to 5.25 VS 1 mV/V Temperature Drift Delta from 25°C 5 mV POWER SUPPLY Operating Voltage Range 4.75 5.00 5.25 V Quiescent Supply Current IOUT = 0 mA, 5 V, 25°C 95 110 mA TEMPERATURE RANGE Specified Performance Grade A Temperature tested to minimum and maximum specifications −40 +85 °C 1 All minimum and maximum specifications are guaranteed. Typical specifications are not tested or guaranteed. 2 Dynamic range is the maximum full-scale measurement range possible, including output swing range, initial offset, sensitivity, offset drift, and sensitivity drift at 4.75 V to 5.25 V supplies. 3 Specification refers to the maximum extent of this parameter as a worst-case value of TMIN or TMAX, along with long-term effects. 4 Resulting bias stability is <0.01°/sec. 5 Frequency at which response is 3 dB from dc response. See the Setting the Bandwidth section for adjusting this value. 6 Self-test response varies with temperature. 7 The value offered herein assures stability in the output buffer amplifier stage and no degradation of other specified performance parameters.

2000 g and exceed the absolute maximum rating of the device. Care should be exercised in handling to avoid damage. Table 3. Thermal Characteristics Figure 2. Rotational Measurement Orientation

Figure 3. Pin Configuration (Connector-Up View) Table 4. Pin Function Descriptions 10 TEMPOUT Temperature Sensor Output. 12 REFOUT Reference Voltage. 18 RATEOUT Angular Rate Output Signal. 20 FILTER Filter Input. This is used in conjunction with RATEOUT; see the Setting the Bandwidth section for use.

Figure 10. Noise Density vs. Temperature, VCC = 5 V Figure 11. Noise Histogram

16384 SAMPLES

Figure 12. Noise Density vs. Frequency Figure 13. Root Allan Variance vs. Integration Time

of any high performance system. potential noise threats on the power supply lines. ance of the ADIS16120 is made available for system level use. leads and PCB traces may increase the risk of noise introduction. corrections in software for the supply variations. prevent additional mechanical vibration.

0.022 DIA THRU HOLE (TYP)

Figure 16. Mating Socket Recommended Pad Layout

interface/evaluation board options.

37.680 BSC

31.200 BSC

3.240 BSC 2×

37 BSC 2×

Figure 17. Bulkhead Mount Attachment Hole Locations locations for optional alignment posts are also shown in Figure 18. required under the screw head for these hole sizes.

25 BSC

10 BSC

7.500 BSC

6.340 BSC

0.600 BSC

Figure 18. Interface Board Hole Locations for Bulkhead Mount

0.736 BSC

2.400 BSC 2×

4 BSC

37.600 BSC

37 BSC

2.400 BSC

3.100 BSC

Figure 19. Printed Circuit Board Mounting Hole Pattern

25.00 BSC

2.40 BSC

4.00 BSC

2.20 BSC

2.00 BSC

1.00 BSC

3.24 BSC

Figure 20. ADIS16120 PCB Module with Connector Interface

Rev. B | Page 12 of 12 NOTES ©2006–2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05923-0-11/07(B)