Data Sheet

ManualsBrandsCytron ManualsAccelerometersCytron ADXL335 3-Axis Accelerometer

Small, Low Power, 3-Axis ±3 g

Accelerometer

ADXL335

Rev. 0

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FEATURES

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

APPLICATIONS

Cost sensitive, low power, motion- and tilt-sensing

applications

Mobile devices

Gaming systems

Disk drive protection

Image stabilization

Sports and health devices

GENERAL DESCRIPTION

The ADXL335 is a small, thin, low power, complete 3-axis accel-

erometer 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

, C

, and C

capacitors at the X

OUT

, Y

OUT

, and Z

OUT

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.

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).

FUNCTIONAL BLOCK DIAGRAM

7808-001

3-AXIS

SENSOR

AC AMP DEMOD

OUTPUT AMP

COM

OUT

ADXL335

~32kΩ

Figure 1.

Summary of content (16 pages)

PAGE 1
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.
PAGE 2
ADXL335 TABLE OF CONTENTS Features .............................................................................................. 1 Performance ................................................................................ 10 Applications ....................................................................................... 1 Applications Information .............................................................. 11 General Description ..................................................................
PAGE 3
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.
PAGE 4
ADXL335 ABSOLUTE MAXIMUM RATINGS 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) 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.
PAGE 5
ADXL335 1 ST 2 COM 3 NC 4 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 +Z +X 7 8 COM ZOUT 9 6 COM COM 5 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.
PAGE 6
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.
PAGE 7
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.
PAGE 8
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.
PAGE 9
ADXL335 600 500 CH4: ZOUT, 500mV/DIV 300 CH3: YOUT, 500mV/DIV CH2: X OUT, 500mV/DIV CH1: POWER, 1V/DIV OUTPUTS ARE OFFSET FOR CLARITY 100 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.
PAGE 10
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.
PAGE 11
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.
PAGE 12
ADXL335 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. 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 zero g bias output is also ratiometric, thus the zero g output is nominally equal to VS/2 at all supply voltages.
PAGE 13
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.
PAGE 14
ADXL335 OUTLINE DIMENSIONS 0.35 0.30 0.25 0.65 BSC 12 13 PIN 1 INDICATOR 16 2.55 2.40 SQ 2.25 9 8 TOP VIEW 1.50 1.45 1.40 0.55 0.50 0.45 5 4 BOTTOM VIEW 0.05 MAX 0.02 NOM COPLANARITY 0.08 0.15 REF SEATING PLANE 1 EXPOSED PAD 0.15 MAX FOR PROPER CONNECTION OF THE EXPOSED PAD, REFER TO THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION OF THIS DATA SHEET. 111808-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.
PAGE 15
ADXL335 NOTES Page 15 of 16