ADXL345TCCZ-EP

3-Axis, ±2 g/±4 g/±8 g/±16 g Digital Accelerometer ADXL345-EP Enhanced Product FEATURES GENERAL DESCRIPTION Ultralow power: as low as 23 µA in measurement mode and 0.1 µA in standby mode at VS = 2.5 V (typical) Power consumption scales automatically with bandwidth User-selectable resolution from 10 to 13 bits 4 mg/LSB scale factor in all g ranges 32-sample FIFO minimizes host processor load Single tap, double tap, and free-fall detection Activity/inactivity monitoring Supply voltage range: 2.0 V to 3.6 V I/O voltage range: 1.7 V to VS SPI (3- and 4-wire) and I2C digital interfaces Flexible interrupt modes mappable to either interrupt pin Measurement ranges selectable via serial command Bandwidth selectable via serial command 10,000 g shock survival Pb free/RoHS compliant Small and thin: 3 mm × 5 mm × 1 mm LGA package The ADXL345-EP is an extended performance version of the ADXL345, which is a small, thin, ultralow power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16 g. Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4-wire) or I2C digital interface. The ADXL345-EP is well suited for extended temperature range industrial and aerospace equipment. It measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (3.9 mg/LSB) enables measurement of inclination changes less than 1.0°. Several special sensing functions are provided. Activity and inactivity sensing detect the presence or lack of motion by comparing the acceleration on any axis with user-set thresholds. Tap sensing detects single and double taps in any direction. Freefall sensing detects if the device is falling. These functions can be mapped individually to either of two interrupt output pins. An integrated memory management system with a 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor activity and lower overall system power consumption. ENHANCED PRODUCT FEATURES Supports defense and aerospace applications (AQEC standard) Extended industrial temperature range (−55°C to +105°C) Controlled manufacturing baseline One assembly/test site One fabrication site Enhanced product change notification Qualification data available on request Low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation. The ADXL345-EP is supplied in a small, thin, 3 mm × 5 mm × 1 mm, 14-lead, enhanced plastic package. APPLICATIONS Industrial equipment Aerospace equipment FUNCTIONAL BLOCK DIAGRAM VS VDD I/O ADXL345-EP POWER MANAGEMENT ADC 3-AXIS SENSOR DIGITAL FILTER 32 LEVEL FIFO CONTROL AND INTERRUPT LOGIC INT1 INT2 SDA/SDI/SDIO SERIAL I/O SDO/ALT ADDRESS SCL/SCLK GND CS 10413-001 SENSE ELECTRONICS Figure 1. Rev. B 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 ©2009–2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com ADXL345-EP Enhanced Product TABLE OF CONTENTS Features .............................................................................................. 1 Absolute Maximum Ratings ............................................................5 Enhanced Product Features ............................................................ 1 Thermal Resistance .......................................................................5 Applications ....................................................................................... 1 ESD Caution...................................................................................5 General Description ......................................................................... 1 Pin Configuration and Function Descriptions..............................6 Functional Block Diagram .............................................................. 1 Typical Performance Characteristics ..............................................7 Revision History ............................................................................... 2 Outline Dimensions ..........................................................................9 Related Documents .......................................................................... 2 Ordering Guide .............................................................................9 Specifications..................................................................................... 3 REVISION HISTORY 4/13—Rev. A to Rev. B Deleted Package Information Section, Figure 2, and Table 4, Renumbered Sequentially................................................................. 5 2/13—Rev. 0 to Rev. A Changes 354 to 345 in Figure 2 ....................................................... 5 12/11—Revision 0: Initial Version RELATED DOCUMENTS The ADXL345-EP is, by definition, an extended performance variation of the ADXL345 accelerometer. All ADXL345 datasheet descriptions are applicable and not repeated in this document, so users should refer to it for complete functionality and product description. Information and data in this ADXL345-EP subset datasheet supersede those in the standard ADXL345 datasheet. Rev. B | Page 2 of 12 Enhanced Product ADXL345-EP SPECIFICATIONS TA = 25°C, VS = 2.5 V, VDD I/O = 1.8 V, acceleration = 0 g, CS = 10 µF tantalum, CI/O = 0.1 µF, output data rate (ODR) = 800 Hz, unless otherwise noted. All minimum and maximum specifications are guaranteed. Typical specifications are not guaranteed. Table 1. Parameter SENSOR INPUT Measurement Range Nonlinearity Inter-Axis Alignment Error Cross-Axis Sensitivity 2 OUTPUT RESOLUTION All g Ranges ±2 g Range ±4 g Range ±8 g Range ±16 g Range SENSITIVITY Sensitivity at XOUT, YOUT, ZOUT Sensitivity Deviation from Ideal Scale Factor at XOUT, YOUT, ZOUT Sensitivity Change Due to Temperature 0 g OFFSET 0 g Output for XOUT, YOUT 0 g Output for ZOUT 0 g Output Deviation from Ideal, XOUT, YOUT 0 g Output Deviation from Ideal, ZOUT 0 g Offset vs. Temperature for X-, Y-Axes 0 g Offset vs. Temperature for Z-Axis NOISE X-, Y-Axes Z-Axis OUTPUT DATA RATE AND BANDWIDTH Output Data Rate (ODR) 3, 4, 5 SELF-TEST 6 Output Change in X-Axis Output Change in Y-Axis Output Change in Z-Axis POWER SUPPLY Operating Voltage Range (VS) Interface Voltage Range (VDD I/O) Supply Current Standby Mode Leakage Current Turn-On and Wake-Up Time 7 Test Conditions Each axis User selectable Percentage of full scale Each axis 10-bit resolution Full resolution Full resolution Full resolution Full resolution Each axis All g-ranges, full resolution ±2 g, 10-bit resolution ±4 g, 10-bit resolution ±8 g, 10-bit resolution ±16 g, 10-bit resolution All g-ranges All g-ranges, full resolution ±2 g, 10-bit resolution ±4 g, 10-bit resolution ±8 g, 10-bit resolution ±16 g, 10-bit resolution Min 230 230 115 57 29 3.5 3.5 7.1 14.1 28.6 Typ 1 Max Unit ±2, ±4, ±8, ±16 ±0.5 ±0.1 ±1 g % Degrees % 10 10 11 12 13 Bits Bits Bits Bits Bits 256 256 128 64 32 ±1.0 3.9 3.9 7.8 15.6 31.2 ±0.01 282 282 141 71 35 0 0 ±35 ±40 ±0.4 ±1.2 +150 +250 4.3 4.3 8.7 17.5 34.5 LSB/g LSB/g LSB/g LSB/g LSB/g % mg/LSB mg/LSB mg/LSB mg/LSB mg/LSB %/°C Each axis −150 −250 ODR = 100 Hz for ±2 g, 10-bit resolution or all g-ranges, full resolution ODR = 100 Hz for ±2 g, 10-bit resolution or all g-ranges, full resolution User selectable ODR = 3200 Hz Rev. B | Page 3 of 12 0.75 LSB rms 1.1 LSB rms 0.1 3200 Hz 0.20 −2.10 0.30 2.10 −0.20 3.40 g g g 3.6 VS V V µA µA µA ms 2.0 1.7 ODR ≥ 100 Hz ODR < 10 Hz mg mg mg mg mg/°C mg/°C 2.5 1.8 140 23 0.1 1.4 ADXL345-EP Parameter TEMPERATURE Operating Temperature Range WEIGHT Device Weight Enhanced Product Test Conditions Min Typ 1 −55 30 Max Unit +105 °C mg The typical specifications shown are for at least 68% of the population of parts and are based on the worst case of mean ±1 σ, except for 0 g output and sensitivity, which represents the target value. For 0 g output and sensitivity, the deviation from the ideal describes the worst case of mean ±1 σ. Cross-axis sensitivity is defined as coupling between any two axes. 3 Bandwidth is the −3 dB frequency and is defined as half the output data rate, bandwidth = ODR/2. 4 The output format for the 3200 Hz and 1600 Hz ODRs is different from the output format for the remaining ODRs. This difference is described in the ADXL345 data sheet. 5 Output data rates below 6.25 Hz exhibit additional offset shift with increased temperature, depending on selected output data rate. Refer to the ADXL345 data sheet for details. 6 Self-test change is defined as the output (g) when the SELF_TEST bit = 1 (in the DATA_FORMAT register, Address 0x31) minus the output (g) when the SELF_TEST bit = 0. Due to device filtering, the output reaches its final value after 4 × τ when enabling or disabling self-test, where τ = 1/(data rate). The part must be in normal power operation (LOW_POWER bit = 0 in the BW_RATE register, Address 0x2C) for self-test to operate correctly. 7 Turn-on and wake-up times are determined by the user-defined bandwidth. At a 100 Hz data rate, the turn-on and wake-up times are each approximately 11.1 ms. For other data rates, the turn-on and wake-up times are each approximately τ + 1.1 in milliseconds, where τ = 1/(data rate). 1 2 Rev. B | Page 4 of 12 Enhanced Product ADXL345-EP ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 2. Parameter Acceleration Any Axis, Unpowered Any Axis, Powered VS VDD I/O Digital Pins All Other Pins Output Short-Circuit Duration (Any Pin to Ground) Temperature Range Powered Storage Rating Table 3. Package Characteristics 10,000 g 10,000 g −0.3 V to +3.9 V −0.3 V to +3.9 V −0.3 V to VDD I/O + 0.3 V or 3.9 V, whichever is less −0.3 V to +3.9 V Indefinite Package Type 14-Terminal LGA ESD CAUTION −55°C to +105°C −65°C to +150°C Stresses above those listed under 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. Rev. B | Page 5 of 12 θJA 150°C/W θJC 85°C/W Device Weight 30 mg ADXL345-EP Enhanced Product PIN CONFIGURATION AND FUNCTION DESCRIPTIONS ADXL345-EP TOP VIEW (Not to Scale) SCL/SCLK VDD I/O 1 GND 13 SDA/SDI/SDIO 2 12 SDO/ALT ADDRESS RESERVED 3 11 RESERVED GND 4 10 NC 9 INT2 8 INT1 14 +x 5 VS 6 +z 7 CS 10413-002 GND +y Figure 2. Pin Configuration (Top View) Table 4. Pin Function Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Mnemonic VDD I/O GND RESERVED GND GND VS CS INT1 INT2 NC RESERVED SDO/ALT ADDRESS SDA/SDI/SDIO SCL/SCLK Description Digital Interface Supply Voltage. This pin must be connected to ground. Reserved. This pin must be connected to VS or left open. This pin must be connected to ground. This pin must be connected to ground. Supply Voltage. Chip Select. Interrupt 1 Output. Interrupt 2 Output. Not Internally Connected. Reserved. This pin must be connected to ground or left open. Serial Data Output (SPI 4-Wire)/Alternate I2C Address Select (I2C). Serial Data (I2C)/Serial Data Input (SPI 4-Wire)/Serial Data Input and Output (SPI 3-Wire). Serial Communications Clock. SCL is the clock for I2C, and SCLK is the clock for SPI. Rev. B | Page 6 of 12 Enhanced Product ADXL345-EP 150 100 100 50 50 0 0 –50 –50 –100 –100 –20 0 20 40 60 TEMPERATURE (°C) 80 100 –150 –60 150 100 100 50 50 OUTPUT (mg) 150 0 –50 –100 –100 –40 –20 0 20 40 60 TEMPERATURE (°C) 80 100 –150 –60 200 200 150 150 OUTPUT (mg) 250 100 50 0 0 –20 0 20 40 60 TEMPERATURE (°C) 80 100 –40 –20 0 20 40 60 TEMPERATURE (°C) 80 100 100 50 100 –50 –60 10413-011 OUTPUT (mg) 250 –40 80 Figure 7. Y-Axis Zero g Offset vs. Temperature— Eight Parts Soldered to PCB, VS = VDD I/O = 2.5 V Figure 4. Y-Axis Zero g Offset vs. Temperature— Eight Parts in Sockets, VS = VDD I/O = 3.6 V –50 –60 0 20 40 60 TEMPERATURE (°C) 0 –50 –150 –60 –20 Figure 6. X-Axis Zero g Offset vs. Temperature— Eight Parts in Sockets, VS = 2.5 V 10413-005 OUTPUT (mg) Figure 3. X-Axis Zero g Offset vs. Temperature— Eight Parts in Sockets, VS = 3.6 V –40 10413-008 –40 Figure 5. Z-Axis Zero g Offset vs. Temperature— Eight Parts in Sockets, VS = VDD I/O = 3.6 V –40 –20 0 20 40 60 TEMPERATURE (°C) 80 Figure 8. Z-Axis Zero g Offset vs. Temperature— Eight Parts Soldered to PCB, VS = VDD I/O = 2.5 V Rev. B | Page 7 of 12 100 10413-012 –150 –60 10413-007 OUTPUT (mg) 150 10413-004 OUTPUT (mg) TYPICAL PERFORMANCE CHARACTERISTICS Enhanced Product 260 258 258 256 254 252 250 254 252 250 248 248 246 246 244 244 242 –60 –40 –20 0 20 40 60 TEMPERATURE (°C) 80 100 120 242 –60 Figure 9. X-Axis Sensitivity vs. Temperature— Eight Parts in Sockets, VS = VDD I/O = 2.5 V 258 256 254 252 250 248 246 –40 –20 0 20 40 60 TEMPERATURE (°C) 80 100 120 10413-010 244 242 –60 –40 –20 0 20 40 60 TEMPERATURE (°C) 80 100 Figure 11. Y-Axis Sensitivity vs. Temperature— Eight Parts in Sockets, VS = VDD I/O = 2.5 V 260 SENSITIVITY (LSB/g) 256 Figure 10. Z-Axis Sensitivity vs. Temperature— Eight Parts in Sockets, VS = VDD I/O = 2.5 V Rev. B | Page 8 of 12 120 10413-009 SENSITIVITY (LSB/g) 260 10413-006 SENSITIVITY (LSB/g) ADXL345-EP Enhanced Product ADXL345-EP OUTLINE DIMENSIONS PAD A1 CORNER 3.00 BSC 0.49 BOTTOM VIEW 13 14 0.813 × 0.50 1 0.80 BSC 5.00 BSC 0.50 8 7 6 TOP VIEW END VIEW 1.01 0.79 0.74 0.69 0.49 1.50 03-16-2010-A 1.00 0.95 0.85 SEATING PLANE Figure 12. 14-Terminal Land Grid Array [LGA] (CC-14-1) Solder Terminations Finish Is Au over Ni Dimensions shown in millimeters ORDERING GUIDE Model 1 ADXL345TCCZ-EP ADXL345TCCZ-EP-RL7 ADXL345TCCZ-EP-RL 1 Measurement Range (g) ±2, ±4, ±8, ±16 ±2, ±4, ±8, ±16 ±2, ±4, ±8, ±16 Specified Voltage (V) 2.5 2.5 2.5 Temperature Range −55°C to +105°C −55°C to +105°C −55°C to +105°C Z = RoHS Compliant Part. Rev. B | Page 9 of 12 Package Description 14-Terminal Land Grid Array [LGA] 14-Terminal Land Grid Array [LGA] 14-Terminal Land Grid Array [LGA] Package Option CC-14-1 CC-14-1 CC-14-1 ADXL345-EP Enhanced Product NOTES Rev. B | Page 10 of 12 Enhanced Product ADXL345-EP NOTES Rev. B | Page 11 of 12 ADXL345-EP Enhanced Product NOTES Analog Devices offers specific products designated for automotive applications; please consult your local Analog Devices sales representative for details. Standard products sold by Analog Devices are not designed, intended, or approved for use in life support, implantable medical devices, transportation, nuclear, safety, or other equipment where malfunction of the product can reasonably be expected to result in personal injury, death, severe property damage, or severe environmental harm. Buyer uses or sells standard products for use in the above critical applications at Buyer's own risk and Buyer agrees to defend, indemnify, and hold harmless Analog Devices from any and all damages, claims, suits, or expenses resulting from such unintended use. ©2009–2013 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D10413-0-4/13(B) Rev. B | Page 12 of 12