Small, Low Power, 3-Axis ±3 g Accelerometer ADXL335 FEATURES GENERAL DESCRIPTION 3-axis sensing Small, low profile package 4 mm × 4 mm × 1.45 mm LFCSP Low power : 350 μA (typical) Single-supply operation: 1.8 V to 3.6 V 10,000 g shock survival Excellent temperature stability BW adjustment with a single capacitor per axis RoHS/WEEE lead-free compliant The ADXL335 is a small, thin, low power, complete 3-axis accelerometer with signal conditioned voltage outputs. The product measures acceleration with a minimum full-scale range of ±3 g. It can measure the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion, shock, or vibration. The user selects the bandwidth of the accelerometer using the CX, CY, and CZ capacitors at the XOUT, YOUT, and ZOUT pins. Bandwidths can be selected to suit the application, with a range of 0.5 Hz to 1600 Hz for the X and Y axes, and a range of 0.5 Hz to 550 Hz for the Z axis. APPLICATIONS The ADXL335 is available in a small, low profile, 4 mm × 4 mm × 1.45 mm, 16-lead, plastic lead frame chip scale package (LFCSP_LQ). Cost sensitive, low power, motion- and tilt-sensing applications Mobile devices Gaming systems Disk drive protection Image stabilization Sports and health devices FUNCTIONAL BLOCK DIAGRAM +3V VS ADXL335 OUTPUT AMP ~32kΩ XOUT CX 3-AXIS SENSOR CDC AC AMP DEMOD OUTPUT AMP ~32kΩ YOUT CY OUTPUT AMP ~32kΩ ZOUT CZ ST 07808-001 COM Figure 1. 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. 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 ©2009–2010 Analog Devices, Inc. All rights reserved. ADXL335 TABLE OF CONTENTS Features .............................................................................................. 1 Performance ................................................................................ 10 Applications ....................................................................................... 1 Applications Information .............................................................. 11 General Description ......................................................................... 1 Power Supply Decoupling ......................................................... 11 Functional Block Diagram .............................................................. 1 Setting the Bandwidth Using CX, CY, and CZ .......................... 11 Revision History ............................................................................... 2 Self-Test ....................................................................................... 11 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 Design Trade-Offs for Selecting Filter Characteristics: The Noise/BW Trade-Off .................................................................. 11 ESD Caution .................................................................................. 4 Use with Operating Voltages Other Than 3 V ........................... 12 Pin Configuration and Function Descriptions ............................. 5 Axes of Acceleration Sensitivity ............................................... 12 Typical Performance Characteristics ............................................. 6 Layout and Design Recommendations ................................... 13 Theory of Operation ...................................................................... 10 Outline Dimensions ....................................................................... 14 Mechanical Sensor...................................................................... 10 Ordering Guide .......................................................................... 14 REVISION HISTORY 1/10—Rev. A to Rev. B Changes to Figure 21 ........................................................................ 9 7/09—Rev. 0 to Rev. A Changes to Figure 22 ........................................................................ 9 Changes to Outline Dimensions................................................... 14 1/09—Revision 0: Initial Version Rev. B | Page 2 of 16 ADXL335 SPECIFICATIONS TA = 25°C, VS = 3 V, CX = CY = CZ = 0.1 μF, acceleration = 0 g, unless otherwise noted. All minimum and maximum specifications are guaranteed. Typical specifications are not guaranteed. Table 1. Parameter SENSOR INPUT Measurement Range Nonlinearity Package Alignment Error Interaxis Alignment Error Cross-Axis Sensitivity 1 SENSITIVITY (RATIOMETRIC) 2 Sensitivity at XOUT, YOUT, ZOUT Sensitivity Change Due to Temperature 3 ZERO g BIAS LEVEL (RATIOMETRIC) 0 g Voltage at XOUT, YOUT 0 g Voltage at ZOUT 0 g Offset vs. Temperature NOISE PERFORMANCE Noise Density XOUT, YOUT Noise Density ZOUT FREQUENCY RESPONSE 4 Bandwidth XOUT, YOUT 5 Bandwidth ZOUT5 RFILT Tolerance Sensor Resonant Frequency SELF-TEST 6 Logic Input Low Logic Input High ST Actuation Current Output Change at XOUT Output Change at YOUT Output Change at ZOUT OUTPUT AMPLIFIER Output Swing Low Output Swing High POWER SUPPLY Operating Voltage Range Supply Current Turn-On Time 7 TEMPERATURE Operating Temperature Range Conditions Each axis Min Typ ±3 ±3.6 ±0.3 ±1 ±0.1 ±1 Each axis VS = 3 V VS = 3 V 270 300 ±0.01 330 mV/g %/°C VS = 3 V VS = 3 V 1.35 1.2 1.5 1.5 ±1 1.65 1.8 V V mg/°C % of full scale No external filter No external filter Self-Test 0 to Self-Test 1 Self-Test 0 to Self-Test 1 Self-Test 0 to Self-Test 1 −150 +150 +150 No load No load Max g % Degrees Degrees % 150 300 μg/√Hz rms μg/√Hz rms 1600 550 32 ± 15% 5.5 Hz Hz kΩ kHz +0.6 +2.4 +60 −325 +325 +550 V V μA mV mV mV −600 +600 +1000 0.1 2.8 1.8 VS = 3 V No external filter 1 V V 3.6 V μA ms +85 °C 350 1 −40 Unit Defined as coupling between any two axes. Sensitivity is essentially ratiometric to VS. Defined as the output change from ambient-to-maximum temperature or ambient-to-minimum temperature. 4 Actual frequency response controlled by user-supplied external filter capacitors (CX, CY, CZ). 5 Bandwidth with external capacitors = 1/(2 × π × 32 kΩ × C). For CX, CY = 0.003 μF, bandwidth = 1.6 kHz. For CZ = 0.01 μF, bandwidth = 500 Hz. For CX, CY, CZ = 10 μF, bandwidth = 0.5 Hz. 6 Self-test response changes cubically with VS. 7 Turn-on time is dependent on CX, CY, CZ and is approximately 160 × CX or CY or CZ + 1 ms, where CX, CY, CZ are in microfarads (μF). 2 3 Rev. B | Page 3 of 16 ADXL335 ABSOLUTE MAXIMUM RATINGS Rating 10,000 g 10,000 g −0.3 V to +3.6 V (COM − 0.3 V) to (VS + 0.3 V) Indefinite 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. −55°C to +125°C −65°C to +150°C ESD CAUTION Table 2. Parameter Acceleration (Any Axis, Unpowered) Acceleration (Any Axis, Powered) VS All Other Pins Output Short-Circuit Duration (Any Pin to Common) Temperature Range (Powered) Temperature Range (Storage) Rev. B | Page 4 of 16 ADXL335 1 ST 2 VS NC 16 NC VS NC PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 15 14 13 ADXL335 TOP VIEW (Not to Scale) 12 XOUT 11 NC 10 YOUT +Y +X COM 5 9 6 7 8 ZOUT 4 COM NC +Z 3 COM COM NC 07808-003 NC = NO CONNECT NOTES 1. EXPOSED PAD IS NOT INTERNALLY CONNECTED BUT SHOULD BE SOLDERED FOR MECHANICAL INTEGRITY. Figure 2. Pin Configuration Table 3. Pin Function Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 EP 1 Mnemonic NC ST COM NC COM COM COM ZOUT NC YOUT NC XOUT NC VS VS NC Exposed Pad Description No Connect. 1 Self-Test. Common. No Connect.1 Common. Common. Common. Z Channel Output. No Connect.1 Y Channel Output. No Connect. 1 X Channel Output. No Connect. 1 Supply Voltage (1.8 V to 3.6 V). Supply Voltage (1.8 V to 3.6 V). No Connect. 1 Not internally connected. Solder for mechanical integrity. NC pins are not internally connected and can be tied to COM pins, unless otherwise noted. Rev. B | Page 5 of 16 ADXL335 TYPICAL PERFORMANCE CHARACTERISTICS N > 1000 for all typical performance plots, unless otherwise noted. 40 50 40 % OF POPULATION % OF POPULATION 30 30 20 20 10 1.42 1.44 1.46 1.48 1.50 1.52 1.54 1.56 1.58 OUTPUT (V) 0 07808-005 –0.36 –0.34 –0.32 –0.30 –0.28 –0.26 Figure 6. X-Axis Self-Test Response at 25°C, VS = 3 V 50 50 40 40 % OF POPULATION % OF POPULATION –0.38 VOLTS (V) Figure 3. X-Axis Zero g Bias at 25°C, VS = 3 V 30 20 10 30 20 10 1.42 1.44 1.46 1.48 1.50 1.52 1.54 1.56 1.58 OUTPUT (V) 0 07808-006 0 –0.40 0.26 0.28 0.30 0.32 0.34 0.36 0.38 0.40 VOLTS (V) Figure 4. Y-Axis Zero g Bias at 25°C, VS = 3 V 07808-009 0 07808-008 10 Figure 7. Y-Axis Self-Test Response at 25°C, VS = 3 V 40 25 20 % OF POPULATION 15 10 20 10 0 1.42 1.44 1.46 1.48 1.50 1.52 1.54 1.56 OUTPUT (V) 1.58 0 0.48 0.50 0.52 0.54 0.56 0.58 0.60 VOLTS (V) Figure 8. Z-Axis Self-Test Response at 25°C, VS = 3 V Figure 5. Z-Axis Zero g Bias at 25°C, VS = 3 V Rev. B | Page 6 of 16 0.62 07808-010 5 07808-007 % OF POPULATION 30 ADXL335 30 1.55 N=8 1.54 1.53 1.52 20 OUTPUT (V) % OF POPULATION 25 15 10 1.51 1.50 1.49 1.48 1.47 5 1.0 1.5 2.0 2.5 3.0 TEMPERATURE COEFFICIENT (mg/°C) 1.45 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 100 07808-014 0.5 90 100 07808-015 0 07808-011 –3.0 –2.5 –2.0 –1.5 –1.0 –0.5 90 100 07808-016 1.46 0 TEMPERATURE (°C) Figure 9. X-Axis Zero g Bias Temperature Coefficient, VS = 3 V Figure 12. X-Axis Zero g Bias vs. Temperature— Eight Parts Soldered to PCB 1.55 40 N=8 1.54 1.53 1.52 OUTPUT (V) % OF POPULATION 30 20 1.51 1.50 1.49 1.48 10 1.47 1.46 –3.0 –2.5 –2.0 –1.5 –1.0 –0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 TEMPERATURE COEFFICIENT (mg/°C) 1.45 –40 –30 –20 –10 07808-012 0 0 10 20 30 40 50 60 70 80 TEMPERATURE (°C) Figure 10. Y-Axis Zero g Bias Temperature Coefficient, VS = 3 V Figure 13. Y-Axis Zero g Bias vs. Temperature— Eight Parts Soldered to PCB 20 1.50 N=8 1.48 1.46 OUTPUT (V) 1.44 10 1.42 1.40 1.38 1.36 5 1.34 1.32 0 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 TEMPERATURE COEFFICIENT (mg/°C) 07808-013 % OF POPULATION 15 1.30 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 TEMPERATURE (°C) Figure 14. Z-Axis Zero g Bias vs. Temperature— Eight Parts Soldered to PCB Figure 11. Z-Axis Zero g Bias Temperature Coefficient, VS = 3 V Rev. B | Page 7 of 16 ADXL335 20 0.320 N=8 0.315 0.310 SENSITIVITY (V/g) % OF POPULATION 15 10 5 0.305 0.300 0.295 0.290 SENSITIVITY (V/g) 0.280 –40 –30 –20 –10 07808-017 0 0.285 0.288 0.291 0.294 0.297 0.300 0.303 0.306 0.309 0.312 0.315 0 10 20 30 40 50 60 70 80 90 100 TEMPERATURE (°C) Figure 15. X-Axis Sensitivity at 25°C, VS = 3 V 07808-020 0.285 Figure 18. X-Axis Sensitivity vs. Temperature— Eight Parts Soldered to PCB, VS = 3 V 0.320 25 N=8 0.315 20 SENSITIVITY (V/g) % OF POPULATION 0.310 15 10 0.305 0.300 0.295 0.290 5 0 10 20 30 40 50 60 70 80 90 100 07808-021 SENSITIVITY (V/g) 0.280 –40 –30 –20 –10 07808-018 0 0.285 0.288 0.291 0.294 0.297 0.300 0.303 0.306 0.309 0.312 0.315 90 100 07808-022 0.285 TEMPERATURE (°C) Figure 19. Y-Axis Sensitivity vs. Temperature— Eight Parts Soldered to PCB, VS = 3 V Figure 16. Y-Axis Sensitivity at 25°C, VS = 3 V 25 0.320 N=8 0.315 20 SENSITIVITY (V/g) 15 10 0.305 0.300 0.295 0.290 5 0.285 0 0.285 0.288 0.291 0.294 0.297 0.300 0.303 0.306 0.309 0.312 0.315 SENSITIVITY (V/g) 07808-019 % OF POPULATION 0.310 0.280 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 TEMPERATURE (°C) Figure 20. Z-Axis Sensitivity vs. Temperature— Eight Parts Soldered to PCB, VS = 3 V Figure 17. Z-Axis Sensitivity at 25°C, VS = 3 V Rev. B | Page 8 of 16 ADXL335 350 CX = CY = CZ = 0.0047µF 300 CH4: ZOUT, 500mV/DIV 200 100 CH2: X OUT, 500mV/DIV CH1: POWER, 1V/DIV OUTPUTS ARE OFFSET FOR CLARITY 50 0 1.5 2.0 2.5 3.0 3.5 4.0 SUPPLY (V) Figure 21. Typical Current Consumption vs. Supply Voltage TIME (1ms/DIV) Figure 22. Typical Turn-On Time, VS = 3 V Rev. B | Page 9 of 16 07808-024 CH3: YOUT, 500mV/DIV 150 07808-023 CURRENT (µA) 250 ADXL335 THEORY OF OPERATION The ADXL335 is a complete 3-axis acceleration measurement system. The ADXL335 has a measurement range of ±3 g minimum. It contains a polysilicon surface-micromachined sensor and signal conditioning circuitry to implement an open-loop acceleration measurement architecture. The output signals are analog voltages that are proportional to acceleration. The accelerometer can measure the static acceleration of gravity in tilt-sensing applications as well as dynamic acceleration resulting from motion, shock, or vibration. The sensor is a polysilicon surface-micromachined structure built on top of a silicon wafer. Polysilicon springs suspend the structure over the surface of the wafer and provide a resistance against acceleration forces. Deflection of the structure is measured using a differential capacitor that consists of independent fixed plates and plates attached to the moving mass. The fixed plates are driven by 180° out-of-phase square waves. Acceleration deflects the moving mass and unbalances the differential capacitor resulting in a sensor output whose amplitude is proportional to acceleration. Phase-sensitive demodulation techniques are then used to determine the magnitude and direction of the acceleration. The demodulator output is amplified and brought off-chip through a 32 kΩ resistor. The user then sets the signal bandwidth of the device by adding a capacitor. This filtering improves measurement resolution and helps prevent aliasing. MECHANICAL SENSOR The ADXL335 uses a single structure for sensing the X, Y, and Z axes. As a result, the three axes’ sense directions are highly orthogonal and have little cross-axis sensitivity. Mechanical misalignment of the sensor die to the package is the chief source of cross-axis sensitivity. Mechanical misalignment can, of course, be calibrated out at the system level. PERFORMANCE Rather than using additional temperature compensation circuitry, innovative design techniques ensure that high performance is built in to the ADXL335. As a result, there is no quantization error or nonmonotonic behavior, and temperature hysteresis is very low (typically less than 3 mg over the −25°C to +70°C temperature range). Rev. B | Page 10 of 16 ADXL335 APPLICATIONS INFORMATION POWER SUPPLY DECOUPLING For most applications, a single 0.1 μF capacitor, CDC, placed close to the ADXL335 supply pins adequately decouples the accelerometer from noise on the power supply. However, in applications where noise is present at the 50 kHz internal clock frequency (or any harmonic thereof), additional care in power supply bypassing is required because this noise can cause errors in acceleration measurement. If additional decoupling is needed, a 100 Ω (or smaller) resistor or ferrite bead can be inserted in the supply line. Additionally, a larger bulk bypass capacitor (1 μF or greater) can be added in parallel to CDC. Ensure that the connection from the ADXL335 ground to the power supply ground is low impedance because noise transmitted through ground has a similar effect to noise transmitted through VS. SETTING THE BANDWIDTH USING CX, CY, AND CZ The ADXL335 has provisions for band limiting the XOUT, YOUT, and ZOUT pins. Capacitors must be added at these pins to implement low-pass filtering for antialiasing and noise reduction. The equation for the 3 dB bandwidth is F−3 dB = 1/(2π(32 kΩ) × C(X, Y, Z)) or more simply F–3 dB = 5 μF/C(X, Y, Z) The tolerance of the internal resistor (RFILT) typically varies as much as ±15% of its nominal value (32 kΩ), and the bandwidth varies accordingly. A minimum capacitance of 0.0047 μF for CX, CY, and CZ is recommended in all cases. DESIGN TRADE-OFFS FOR SELECTING FILTER CHARACTERISTICS: THE NOISE/BW TRADE-OFF The selected accelerometer bandwidth ultimately determines the measurement resolution (smallest detectable acceleration). Filtering can be used to lower the noise floor to improve the resolution of the accelerometer. Resolution is dependent on the analog filter bandwidth at XOUT, YOUT, and ZOUT. The output of the ADXL335 has a typical bandwidth of greater than 500 Hz. The user must filter the signal at this point to limit aliasing errors. The analog bandwidth must be no more than half the analog-to-digital sampling frequency to minimize aliasing. The analog bandwidth can be further decreased to reduce noise and improve resolution. The ADXL335 noise has the characteristics of white Gaussian noise, which contributes equally at all frequencies and is described in terms of μg/√Hz (the noise is proportional to the square root of the accelerometer bandwidth). The user should limit bandwidth to the lowest frequency needed by the application to maximize the resolution and dynamic range of the accelerometer. With the single-pole, roll-off characteristic, the typical noise of the ADXL335 is determined by rms Noise = Noise Density × ( BW × 1.6 ) It is often useful to know the peak value of the noise. Peak-topeak noise can only be estimated by statistical methods. Table 5 is useful for estimating the probabilities of exceeding various peak values, given the rms value. Table 4. Filter Capacitor Selection, CX, CY, and CZ Bandwidth (Hz) 1 10 50 100 200 500 Never expose the ST pin to voltages greater than VS + 0.3 V. If this cannot be guaranteed due to the system design (for instance, if there are multiple supply voltages), then a low VF clamping diode between ST and VS is recommended. Capacitor (μF) 4.7 0.47 0.10 0.05 0.027 0.01 Table 5. Estimation of Peak-to-Peak Noise SELF-TEST The ST pin controls the self-test feature. When this pin is set to VS, an electrostatic force is exerted on the accelerometer beam. The resulting movement of the beam allows the user to test if the accelerometer is functional. The typical change in output is −1.08 g (corresponding to −325 mV) in the X-axis, +1.08 g (or +325 mV) on the Y-axis, and +1.83 g (or +550 mV) on the Z-axis. This ST pin can be left open-circuit or connected to common (COM) in normal use. Peak-to-Peak Value 2 × rms 4 × rms 6 × rms 8 × rms Rev. B | Page 11 of 16 % of Time That Noise Exceeds Nominal Peak-to-Peak Value 32 4.6 0.27 0.006 ADXL335 USE WITH OPERATING VOLTAGES OTHER THAN 3 V The ADXL335 is tested and specified at VS = 3 V; however, it can be powered with VS as low as 1.8 V or as high as 3.6 V. Note that some performance parameters change as the supply voltage is varied. The ADXL335 output is ratiometric, therefore, the output sensitivity (or scale factor) varies proportionally to the supply voltage. At VS = 3.6 V, the output sensitivity is typically 360 mV/g. At VS = 2 V, the output sensitivity is typically 195 mV/g. Self-test response in g is roughly proportional to the square of the supply voltage. However, when ratiometricity of sensitivity is factored in with supply voltage, the self-test response in volts is roughly proportional to the cube of the supply voltage. For example, at VS = 3.6 V, the self-test response for the ADXL335 is approximately −560 mV for the X-axis, +560 mV for the Y-axis, and +950 mV for the Z-axis. At VS = 2 V, the self-test response is approximately −96 mV for the X-axis, +96 mV for the Y-axis, and −163 mV for the Z-axis. The supply current decreases as the supply voltage decreases. Typical current consumption at VS = 3.6 V is 375 μA, and typical current consumption at VS = 2 V is 200 μA. The zero g bias output is also ratiometric, thus the zero g output is nominally equal to VS/2 at all supply voltages. AXES OF ACCELERATION SENSITIVITY The output noise is not ratiometric but is absolute in volts; therefore, the noise density decreases as the supply voltage increases. This is because the scale factor (mV/g) increases while the noise voltage remains constant. At VS = 3.6 V, the X-axis and Y-axis noise density is typically 120 μg/√Hz, whereas at VS = 2 V, the X-axis and Y-axis noise density is typically 270 μg/√Hz. AZ AX 07808-025 AY Figure 23. Axes of Acceleration Sensitivity; Corresponding Output Voltage Increases When Accelerated Along the Sensitive Axis. XOUT = –1g YOUT = 0g ZOUT = 0g TOP GRAVITY TOP TOP XOUT = 0g YOUT = –1g ZOUT = 0g TOP XOUT = 1g YOUT = 0g ZOUT = 0g XOUT = 0g YOUT = 0g ZOUT = 1g Figure 24. Output Response vs. Orientation to Gravity Rev. B | Page 12 of 16 XOUT = 0g YOUT = 0g ZOUT = –1g 07808-026 XOUT = 0g YOUT = 1g ZOUT = 0g ADXL335 LAYOUT AND DESIGN RECOMMENDATIONS The recommended soldering profile is shown in Figure 25 followed by a description of the profile features in Table 6. The recommended PCB layout or solder land drawing is shown in Figure 26. CRITICAL ZONE TL TO TP tP TP tL TSMAX TSMIN tS RAMP-DOWN PREHEAT 07808-002 TEMPERATURE RAMP-UP TL t25°C TO PEAK TIME Figure 25. Recommended Soldering Profile Table 6. Recommended Soldering Profile Profile Feature Average Ramp Rate (TL to TP) Preheat Minimum Temperature (TSMIN) Maximum Temperature (TSMAX) Time (TSMIN to TSMAX)(tS) TSMAX to TL Ramp-Up Rate Time Maintained Above Liquidous (TL) Liquidous Temperature (TL) Time (tL) Peak Temperature (TP) Time Within 5°C of Actual Peak Temperature (tP) Ramp-Down Rate Time 25°C to Peak Temperature 0.50 MAX Sn63/Pb37 3°C/sec max Pb-Free 3°C/sec max 100°C 150°C 60 sec to 120 sec 150°C 200°C 60 sec to 180 sec 3°C/sec max 3°C/sec max 183°C 60 sec to 150 sec 240°C + 0°C/−5°C 10 sec to 30 sec 6°C/sec max 6 minutes max 217°C 60 sec to 150 sec 260°C + 0°C/−5°C 20 sec to 40 sec 6°C/sec max 8 minutes max 4 0.65 0.325 0.35 MAX 0.65 4 1.95 0.325 1.95 DIMENSIONS SHOWN IN MILLIMETERS Figure 26. Recommended PCB Layout Rev. B | Page 13 of 16 07808-004 EXPOSED PAD IS NOT INTERNALLY CONNECTED BUT SHOULD BE SOLDERED FOR MECHANICAL INTEGRITY. ADXL335 OUTLINE DIMENSIONS 0.35 0.30 0.25 0.65 BSC 12 1.50 1.45 1.40 0.55 0.50 0.45 8 1 2.55 2.40 SQ 2.25 5 4 BOTTOM VIEW 0.05 MAX 0.02 NOM COPLANARITY 0.08 0.15 REF SEATING PLANE 16 13 EXPOSED PAD 9 TOP VIEW PIN 1 INDICATOR 0.15 MAX FOR PROPER CONNECTION OF THE EXPOSED PAD, REFER TO THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION OF THIS DATA SHEET. COMPLIANT TO JEDEC STANDARDS MO-220-WGGD. 051909-A PIN 1 INDICATOR 4.15 4.00 SQ 3.85 Figure 27. 16-Lead Lead Frame Chip Scale Package [LFCSP_LQ] 4 mm × 4 mm Body, 1.45 mm Thick Quad (CP-16-14) Dimensions shown in millimeters ORDERING GUIDE Model 1 ADXL335BCPZ ADXL335BCPZ–RL ADXL335BCPZ–RL7 EVAL-ADXL335Z 1 Measurement Range ±3 g ±3 g ±3 g Specified Voltage 3V 3V 3V Temperature Range −40°C to +85°C −40°C to +85°C −40°C to +85°C Z = RoHS Compliant Part. Rev. B | Page 14 of 16 Package Description 16-Lead LFCSP_LQ 16-Lead LFCSP_LQ 16-Lead LFCSP_LQ Evaluation Board Package Option CP-16-14 CP-16-14 CP-16-14 ADXL335 NOTES Rev. B | Page 15 of 16 ADXL335 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. ©2009–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07808-0-1/10(B) Rev. B | Page 16 of 16