ADXL330KCPZ-RL1

ADXL330_07 AD | Alldatasheet

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Technical content

Small, Low Power, 3-Axis ±3 g i MEMS® Accelerometer ADXL330 Rev. A 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 ©2007 Analog Devices, Inc. All rights reserved.

FEATURES

Small, low-profile package 4 mm × 4 mm × 1.45 mm LFCSP Low power 180 μA at VS = 1.8 V (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

APPLICATIONS

Cost-sensitive, low power, motion- and tilt-sensing The ADXL330 is a small, thin, low power, complete 3-axis accelerometer with signal conditioned voltage outputs, all on a single monolithic IC. 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 X and Y axes, and a range of 0.5 Hz to 550 Hz for the Z axis. The ADXL330 is available in a small, low profile, 4 mm × 4 mm × 1.45 mm, 16-lead, plastic lead frame chip scale package (LFCSP_LQ). FUNCTIONAL BLOCK DIAGRAM 05677-001 3-AXIS SENSOR AC AMP DEMOD OUTPUT AMP OUTPUT AMP OUTPUT AMP VS COM ST XOUT YOUT ZOUT +3V CX CY CZ ADXL330 RFILT RFILT RFILT CDC Figure 1.

Rev. A | Page 2 of 16 TABLE OF CONTENTS Design Trade-Offs for Selecting Filter Characteristics: The

REVISION HISTORY

9/06—Rev. 0 to Rev. A 3/06—Revision 0: Initial Version

Rev. A | Page 3 of 16 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 Conditions Min Typ Max Unit SENSOR INPUT Each axis Measurement Range ±3 ±3.6 g Nonlinearity % of full scale ±0.3 % Package Alignment Error ±1 Degrees Interaxis Alignment Error ±0.1 Degrees Cross Axis Sensitivity1 ±1 % SENSITIVITY (RATIOMETRIC)2 Each axis Sensitivity at XOUT, YOUT, ZOUT VS = 3 V 270 300 330 mV/g Sensitivity Change Due to Temperature3 VS = 3 V ±0.015 %/°C ZERO g BIAS LEVEL (RATIOMETRIC) Each axis 0 g Voltage at XOUT, YOUT, ZOUT VS = 3 V 1.2 1.5 1.8 V 0 g Offset vs. Temperature ±1 mg/°C NOISE PERFORMANCE Noise Density XOUT, YOUT 280 μg/√Hz rms Noise Density ZOUT 350 μg/√Hz rms FREQUENCY RESPONSE4 Bandwidth XOUT, YOUTT

5 No external filter 1600 Hz

Bandwidth ZOUT5 No external filter 550 Hz RFILT Tolerance 32 ± 15% kΩ Sensor Resonant Frequency 5.5 kHz SELF TESTT Logic Input Low +0.6 V Logic Input High +2.4 V ST Actuation Current +60 μA Output Change at XOUT Self test 0 to 1 −150 mV Output Change at YOUT Self test 0 to 1 +150 mV Output Change at ZOUT Self test 0 to 1 −60 mV OUTPUT AMPLIFIER Output Swing Low No load 0.1 V Output Swing High No load 2.8 V POWER SUPPLY Operating Voltage Range 1.8 3.6 V Supply Current VS = 3 V 320 μA Turn-On Time7 No external filter 1 ms TEMPERATURE Operating Temperature Range −25 +70 °C 1 Defined as coupling between any two axes. 2 Sensitivity is essentially ratiometric to VS. 3 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). 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 μF.

Figure 2. Recommended Soldering Profile Table 3. Recommended Soldering Profile degradation or loss of functionality.

Figure 3. Pin Configuration Figure 4. Recommended PCB Layout Table 4. Pin Function Descriptions

1 NC No Connect

2 ST Self Test

3 COM Common

4 NC No Connect

5 COM Common

6 COM Common

7 COM Common

8 ZOUT Z Channel Output

9 NC No Connect

10 YOUT Y Channel Output

11 NC No Connect

12 XOUT X Channel Output

13 NC No Connect

16 NC No Connect

Figure 23. X-Axis Sensitivity Drift Over Temperature, VS = 3 V Figure 24. Y-Axis Sensitivity Drift Over Temperature, VS = 3 V Figure 25. Z-Axis Sensitivity Drift Over Temperature, VS = 3 V Figure 26. X-Axis Sensitivity vs. Temperature

8 Parts Soldered to PCB, VS = 3 V

Figure 27. Y-Axis Sensitivity vs. Temperature Figure 28. Z-Axis Sensitivity vs. Temperature

Rev. A | Page 12 of 16 For most applications, a single 0.1 μF capacitor, CDC, placed close to the ADXL330 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 as 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 C DC. Ensure that the connection from the ADXL330 ground to the power supply ground is low impedance because noise transmitted through ground has a similar effect as noise transmitted through VS. SETTING THE BANDWIDTH USING CX, CY, AND CZ The ADXL330 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. Table 5. Filter Capacitor Selection, CX, CY, and CZ VS, an electrostatic force is exerted on the accelerometer beam. 150 mV) on the Y-axis, and −200 mg (or −60 mV) on the Z-axis. clamping diode between ST and VS is recommended. the measurement resolution (smallest detectable acceleration). analog filter bandwidth at XOUT, YOUT, and ZOUT. reduce noise and improve resolution. can only be estimated by statistical methods. values, given the rms value. Table 6. Estimation of Peak-to-Peak Noise

0.65 BSC

1.081.95 BSC

0.20 MIN PIN 1

0.20 MIN

0.05 MAX

0.02 NOM

*STACKED DIE WITH GLASS SEAL. Figure 33. 16-Lead Lead Frame Chip Scale Package [LFCSP_LQ]

Rev. A | Page 15 of 16 NOTES

Rev. A | Page 16 of 16 NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05677-0-6/07(A)