High Stability, Low Noise Vibration Rejecting Yaw Rate Gyroscope ADXRS646-EP Enhanced Product FEATURES GENERAL DESCRIPTION 12°/hr bias stability Z-axis (yaw rate) response 0.01°/√sec angle random walk High vibration rejection over wide frequency Measurement range extendable to a maximum of ±450°/sec 10,000 g powered shock survivability Ratiometric to referenced supply 6 V single-supply operation Self-test on digital command Ultrasmall and light (<0.15 cc, <0.5 gram) Temperature sensor output Complete rate gyroscope on a single chip RoHS compliant The ADXRS646-EP is a high performance angular rate sensor (gyroscope) that offers excellent vibration immunity. Bias stability is a widely recognized figure of merit for high performance gyroscopes, but in real-world applications, vibration sensitivity is often a more significant performance limitation and should be considered in gyroscope selection. The ADXRS646-EP offers superior vibration immunity and acceleration rejection as well as a low bias drift of 12°/hr (typical), enabling it to offer rate sensing in harsh environments where shock and vibration are present. The ADXRS646-EP is manufactured using the Analog Devices, Inc., patented high volume BiMOS surface-micromachining process. An advanced, differential, quad sensor design provides the improved acceleration and vibration rejection. The output signal, RATEOUT, is a voltage proportional to angular rate about the axis normal to the top surface of the package. The measurement range is a minimum of ±250°/sec. The output is ratiometric with respect to a provided reference supply. Other external capacitors are required for operation. ENHANCED PRODUCT FEATURES Supports defense and aerospace applications (AQEC standard) Extended industrial temperature range (−55°C to +105°C) Controlled manufacturing baseline 1 assembly/test site 1 fabrication site Enhanced product change notification Qualification data available on request A temperature output is provided for compensation techniques. Two digital self-test inputs electromechanically excite the sensor to test proper operation of both the sensor and the signal conditioning circuits. APPLICATIONS Industrial applications Severe mechanical environments Platform stabilization The ADXRS646-EP is available in a 7 mm × 7 mm × 3 mm CBGA chip-scale package. Additional application and technical information can be found in the ADXRS646-EP data sheet. FUNCTIONAL BLOCK DIAGRAM 3V TO 6V (ADC REF) 6V ST2 AV CC 100nF ST1 TEMP SELF-TEST 25kΩ @ 25°C VRATIO 100nF ADXRS646-EP 25kΩ AGND DEMOD MECHANICAL SENSOR DRIVE AMP 6V AC AMP VGA ROUT VDD 180kΩ ±1% CHARGE PUMP AND VOLTAGE REGULATOR 100nF PGND SUMJ RATEOUT 100nF 22nF 22nF COUT 10046-001 CP1 CP2 CP3 CP4 CP5 Figure 1. Rev. 0 Document Feedback 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. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2012 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com ADXRS646-EP Enhanced Product TABLE OF CONTENTS Features .............................................................................................. 1 Absolute Maximum Ratings ............................................................4 Enhanced Product Features ............................................................ 1 Rate Sensitive Axis ........................................................................4 Applications ....................................................................................... 1 ESD Caution...................................................................................4 General Description ......................................................................... 1 Pin Configuration and Function Descriptions..............................5 Functional Block Diagram .............................................................. 1 Typical Performance Characteristics ..............................................6 Revision History ............................................................................... 2 Outline Dimensions ..........................................................................9 Specifications..................................................................................... 3 Ordering Guide .............................................................................9 REVISION HISTORY 10/12—Revision 0: Initial Version Rev. 0 | Page 2 of 12 Enhanced Product ADXRS646-EP SPECIFICATIONS All minimum and maximum specifications are guaranteed. Typical specifications are not guaranteed. TA = 25°C, VS = AVCC = VDD = 6 V, VRATIO = AVCC, angular rate = 0°/sec, bandwidth = 80 Hz (COUT = 0.01 µF), IOUT = 100 µA, ±1 g, unless otherwise noted. Table 1. Parameter SENSITIVITY 1 Measurement Range 2 Initial Temperature Drift 3 Nonlinearity NULL1 Null Temperature Drift3 Linear Acceleration Effect Vibration Rectification NOISE PERFORMANCE Rate Noise Density Rate Noise Density Resolution Floor FREQUENCY RESPONSE Bandwidth 4 Sensor Resonant Frequency SELF-TEST1 ST1 RATEOUT Response ST2 RATEOUT Response ST1 to ST2 Mismatch 5 Logic 1 Input Voltage Logic 0 Input Voltage Input Impedance TEMPERATURE SENSOR1 VOUT at 25°C Scale Factor 6 Load to VS Load to Common TURN-ON TIME6 OUTPUT DRIVE CAPABILITY Current Drive Capacitive Load Drive POWER SUPPLY Operating Voltage (VS) Quiescent Supply Current TEMPERATURE RANGE Specified Performance Test Conditions/Comments Clockwise rotation is positive output Full-scale range over specifications range Min Typ ±250 8.5 ±300 9 ±3 0.01 2.7 Any axis 25 g rms, 50 Hz to 5 kHz 3.0 ±3 0.015 0.0001 TA ≤ 25°C TA ≤ 105°C TA = 25°C, 1 minute to 1 hour in-run 0.01 0.015 12 Best fit straight line −40°C to +105°C ±3 dB user adjustable up to specification 15.5 ST1 pin from Logic 0 to Logic 1 ST2 pin from Logic 0 to Logic 1 1000 17.5 Max 9.5 3.3 20 +5 2 100 −5 4 ST1 pin or ST2 pin to common 40 50 Load = 10 MΩ 25°C, VRATIO = 6 V 2.8 2.9 10 25 25 °/sec mV/°/sec % % of FS V °/sec °/sec/g °/sec/g2 °/sec/√Hz °/sec/√Hz °/hr −50 50 ±0.5 ST1 pin or ST2 pin Unit °/sec °/sec % V V kΩ Power on to ±0.5°/sec of final with CP5 = 100 nF 50 V mV/°C kΩ kΩ ms For rated specifications 200 1000 µA pF 6.25 V mA +105 °C 5.75 −55 1 6.00 4 3.0 Hz kHz Parameter is linearly ratiometric with VRATIO. Measurement range is the maximum range possible, including output swing range, initial offset, sensitivity, offset drift, and sensitivity drift at 5 V supplies. From +25°C to −40°C or +25°C to +105°C. 4 Adjusted by external capacitor, COUT. Reducing bandwidth below 0.01 Hz does not result in further noise improvement. 5 Self-test mismatch is described as (ST2 + ST1)/((ST2 − ST1)/2). 6 Based on characterization. 2 3 Rev. 0 | Page 3 of 12 ADXRS646-EP Enhanced Product ABSOLUTE MAXIMUM RATINGS RATE SENSITIVE AXIS Parameter Acceleration (Any Axis, 0.5 ms) Unpowered Powered VDD, AVCC VRATIO ST1, ST2 Output Short-Circuit Duration (Any Pin to Common) Operating Temperature Range Storage Temperature Range Rating 10,000 g 10,000 g −0.3 V to +6.6 V AVCC AVCC Indefinite −65°C to +125°C −65°C to +150°C This is a Z-axis rate-sensing device (also called a yaw ratesensing device). It produces a positive going output voltage for clockwise rotation about the axis normal to the package top, that is, clockwise when looking down at the package lid. RATE AXIS RATE OUT AV CC = 5V LONGITUDINAL AXIS 4.75V + VRATIO /2 7 RATE IN 1 Stresses above those listed under the Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. A1 0.25V ABCDE FG LATERAL AXIS GND Figure 2. RATEOUT Signal Increases with Clockwise Rotation ESD CAUTION Drops onto hard surfaces can cause shocks of greater than 10,000 g and can exceed the absolute maximum rating of the device. Care should be exercised in handling to avoid damage. Rev. 0 | Page 4 of 12 10046-002 Table 2. Enhanced Product ADXRS646-EP PIN CONFIGURATION AND FUNCTION DESCRIPTIONS BOTTOM VIEW VDD PGND CP5 CP3 CP4 7 6 ST1 CP1 5 ST2 CP2 4 AV CC 3 TEMP 2 1 G F VRATIO DNC SUMJ E D C RATEOUT B NOTES 1. DNC = DO NOT CONNECT TO THIS PIN. A 10046-003 AGND Figure 3. Pin Configuration Table 3. Pin Function Descriptions Pin No. 6D, 7D 6A, 7B 6C, 7C 5A, 5B 4A, 4B 3A, 3B 1B, 2A 1C, 2C 1D, 2D 1E, 2E 1F, 2G 3F, 3G 4F, 4G 5F, 5G 6G, 7F 6E, 7E Mnemonic CP5 CP4 CP3 CP1 CP2 AVCC RATEOUT SUMJ DNC VRATIO AGND TEMP ST2 ST1 PGND VDD Description HV Filter Capacitor, 100nF (±5%). Charge Pump Capacitor, 22 nF (±5%). Charge Pump Capacitor, 22 nF (±5%). Charge Pump Capacitor, 22 nF (±5%). Charge Pump Capacitor, 22 nF (±5%). Positive Analog Supply. Rate Signal Output. Output Amp Summing Junction. Do Not Connect to this Pin. Reference Supply for Ratiometric Output. Analog Supply Return. Temperature Voltage Output. Self-Test for Sensor 2. Self-Test for Sensor 1. Charge Pump Supply Return. Positive Charge Pump Supply. Rev. 0 | Page 5 of 12 ADXRS646-EP Enhanced Product TYPICAL PERFORMANCE CHARACTERISTICS N > 1000 for all typical performance plots, unless otherwise noted. 35 30 25 PERCENT OF POPULATION (%) 20 15 10 25 20 15 10 5 RATEOUT (V) 0 8.5 10046-004 3.25 3.20 3.15 3.10 3.05 3.00 2.95 2.90 2.85 2.80 2.75 0 5 8.6 8.7 8.8 8.9 9.0 9.1 9.2 9.3 9.4 9.5 SENSITIVITY (mV/°/sec) 10046-010 PERCENT OF POPULATION (%) 30 Figure 7. Sensitivity at 25°C Figure 4. Null Bias at 25°C 30 40 PERCENT OF POPULATION (%) PERCENT OF POPULATION (%) 35 25 20 15 10 30 25 20 15 10 5 –10 –8 –6 –4 –2 0 2 4 6 8 10 12 14 16 18 20 PERCENT DRIFT (%) Figure 5. Null Drift over Temperature (VRATIO = 5 V) 10046-011 DRIFT (°/sec/°C) 0 10046-005 0.30 0.25 0.20 0.15 0.10 0.05 0 –0.05 –0.10 –0.15 –0.20 –0.25 0 –0.30 5 Figure 8. Sensitivity Drift over Temperature 3.5 1k 3.3 NULL (V) 3.2 3.1 3.0 2.9 2.8 2.7 2.5 –60 –40 –20 0 20 40 60 TEMPERATURE (°C) 80 100 120 140 10046-100 2.6 Figure 6. Null Output over Temperature, 16 Parts in Sockets (VRATIO = 5 V) Rev. 0 | Page 6 of 12 100 10 1 0.01 0.1 1 10 100 1k AVERAGING TIME (Seconds) Figure 9. Typical Root Allan Deviation at 25°C vs. Averaging Time 10046-012 ROOT ALLAN DEVIATION (°/Hour rms) 3.4 Enhanced Product ADXRS646-EP PERCENT OF POPULATION (%) 25 –0.35 0.70 –0.40 0.65 –0.45 0.60 –0.50 –0.55 0.45 –0.65 0.40 –0.70 0.35 40 60 80 100 120 140 0.30 –60 TEMPERATURE (°C) –20 0 20 40 9 MAGNITUDE RESPONSE (dB) 40 30 20 10 –3 –2 –1 0 1 2 3 MISMATCH (%) Figure 12. Self-Test Mismatch at 25°C (VRATIO = 5 V) 4 PHASE 650 10046-007 630 590 570 610 120 140 0 –10 3 –20 0 –30 MAGNITUDE –3 –40 –6 –50 –9 –60 –12 –70 –15 –80 –18 0.1 10046-008 0 100 COUT = 470pF 6 60 50 80 Figure 14. ST2 Output Change vs. Temperature, 16 Parts in Sockets 70 –4 550 510 530 60 TEMPERATURE (°C) Figure 11. ST1 Output Change vs. Temperature, 16 Parts in Sockets PERCENT OF POPULATION (%) –40 1 –90 10 FREQUENCY (kHz) Figure 15. ADXRS646-EP Frequency Response with a 2.2 kHz Output Filter Rev. 0 | Page 7 of 12 10046-101 20 PHASE RESPONSE (Degrees) 0 490 0.50 –0.60 –20 470 0.55 10046-103 ST2Δ (V) 0.75 10046-104 ST1Δ (V) Figure 13. ST2 Output Change at 25°C (VRATIO = 5 V) –0.30 –40 450 ST2Δ (mV) Figure 10. ST1 Output Change at 25°C (VRATIO = 5 V) –0.75 –60 430 0 410 –350 ST1Δ (mV) 5 10046-006 –370 –390 –410 –430 –450 –470 –490 –510 –530 –550 –570 –590 –610 0 –630 5 10 390 10 15 370 15 20 350 20 –650 PERCENT OF POPULATION (%) 25 Enhanced Product 35 70 30 60 50 40 30 20 20 15 10 10046-009 3.30 3.25 3.20 3.15 3.10 3.05 3.00 2.95 2.90 0 2.85 0 2.80 5 2.75 10 VTEMP OUTPUT (V) 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 50 100 TEMPERATURE (°C) 150 10046-102 0.5 –50 2.9 3.0 3.1 3.2 3.3 Figure 18. Current Consumption at 25°C (VRATIO = 5 V) 4.5 0 –100 2.8 CURRENT CONSUMPTION (mA) Figure 16. VTEMP Output at 25°C (VRATIO = 5 V) VTEMP (V) 25 Figure 17. VTEMP Output vs. Temperature Rev. 0 | Page 8 of 12 3.4 10046-013 PERCENT OF POPULATION (%) 80 2.70 PERCENT OF POPULATION (%) ADXRS646-EP Enhanced Product ADXRS646-EP OUTLINE DIMENSIONS A1 BALL CORNER 7.05 6.85 SQ 6.70 *A1 CORNER INDEX AREA 7 6 5 4 3 2 1 A B 4.80 BSC SQ 0.80 BSC C D E F G TOP VIEW BOTTOM VIEW DETAIL A 3.80 MAX 0.60 0.55 0.50 SEATING PLANE 3.20 MAX 2.50 MIN COPLANARITY 0.15 BALL DIAMETER *BALL A1 IDENTIFIER IS GOLD PLATED AND CONNECTED TO THE D/A PAD INTERNALLY VIA HOLES. 10-26-2009-B DETAIL A 0.60 MAX 0.25 MIN Figure 19. 32-Lead Ceramic Ball Grid Array [CBGA] (BG-32-3) Dimensions shown in millimeters ORDERING GUIDE Model1 ADXRS646TBGZ-EP ADXRS646TBGZ-EP-RL 1 Temperature Range –55°C to +105°C –55°C to +105°C Package Description 32-Lead Ceramic Ball Grid Array [CBGA] 32-Lead Ceramic Ball Grid Array [CBGA] Z = RoHS Compliant Part. Rev. 0 | Page 9 of 12 Package Option BG-32-3 BG-32-3 ADXRS646-EP Enhanced Product NOTES Rev. 0 | Page 10 of 12 Enhanced Product ADXRS646-EP NOTES Rev. 0 | Page 11 of 12 ADXRS646-EP Enhanced Product NOTES ©2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D10046-0-10/12(0) Rev. 0 | Page 12 of 12 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc.: ADXRS646TBGZ-EP ADXRS646TBGZ-EP-RL