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ADXL202JQC-1 |ADXL202JQC1ADN/a3avai±2 g Dual Axis Accelerometer


ADXL202JQC-1 ,±2 g Dual Axis AccelerometerSPECIFICATIONS Acceleration = 0 g, unless otherwise noted.)1TPC ADXL202JE ADXL202 ..
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ADXL202JQC-1
±2 g Dual Axis Accelerometer
REV.A
Low-Cost �2gDual-Axis Accelerometer
with Duty Cycle Output
FUNCTIONAL BLOCK DIAGRAM
ANALOG
DUTY
CYCLE
(ADC)

XOUT
YOUT
DEMOD
DEMOD
RFILT
32k�
RFILT
32k�
ADXL202E
RSET
YFILT
SELF-TESTXFILT
OSCILLATOR
COM
Y SENSOR
X SENSOR
3V TO 5.25V
VDD
CDC
A(g) = (T1/T2 – 0.5)/12.5%
0g = 50% DUTY CYCLE
T2 = RSET/125M�
FEATURES
2-Axis Acceleration Sensor on a Single IC Chipmm � 5mm � 2mm Ultrasmall Chip Scale Package
2mg Resolution at 60Hz
Low-Power < 0.6mA
Direct Interface to Low-Cost Microcontrollers via
Duty Cycle Output
BW Adjustment with a Single CapacitorV to 5.25V Single Supply Operation
1000g Shock Survival
APPLICATIONS
2-Axis Tilt Sensing with Faster Response than
Electrolytic, Mercury, or Thermal Sensors
Computer Peripherals
Information Appliances
Alarms and Motion Detectors
Disk Drives
Vehicle Security
GENERAL DESCRIPTION

The ADXL202E is a low-cost, low-power, complete 2-axis acceler-
ometer with a digital output, all on a single monolithic IC. It is an
improved version of the ADXL202AQC/JQC. The ADXL202E
will measure accelerations with a full-scale range of �2g. The
ADXL202E can measure both dynamic acceleration (e.g., vibra-
tion) and static acceleration (e.g., gravity).
The outputs are analog voltage or digital signals whose duty cycles
(ratio of pulsewidth to period) are proportional to acceleration.
The duty cycle outputs can be directly measured by a micro-
processor counter, without an A/D converter or glue logic. The
duty cycle period is adjustable from 0.5ms to 10ms via a single
resistor (RSET).
*Patents Pending
The typical noise floor is 200�g√Hz, allowing signals below
2mg (at 60Hz bandwidth) to be resolved.
The bandwidth of the accelerometer is set with capacitors CX and
CY at the XFILT and YFILT pins. An analog output can be recon-
structed by filtering the duty cycle output.
The ADXL202E is available in 5mm � 5mm � 2mm 8-lead
hermetic LCC package.
ADXL202E–SPECIFICATIONS
SENSITIVITY
ZERO g BIAS LEVEL
FILTER
SELF-TEST
DUTY CYCLE OUTPUT STAGE
TEMPERATURE RANGE
NOTESTypical Performance Characteristics.Guaranteed by measurement of initial offset and sensitivity.Alignment error is specified as the angle between the true and indicated axis of sensitivity (see TPC 15).Cross-axis sensitivity is the algebraic sum of the alignment and the inherent sensitivity errors.Defined as the output change from ambient to maximum temperature or ambient to minimum temperature.
Specifications subject to change without notice.
(TA = TMIN to TMAX, TA = 25�C for J Grade only, VDD = 5 V, RSET = 125 k�,
Acceleration = 0 g, unless otherwise noted.)
ABSOLUTE MAXIMUM RATINGS*
Acceleration (Any Axis, Unpowered for 0.5ms) . . . . . . 1000g
Acceleration (Any Axis, Powered for 0.5ms) . . . . . . . . . . 500g
+VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to +6.0V
Output Short Circuit Duration, (Any Pin to Common)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Indefinite
Operating Temperature . . . . . . . . . . . . . . . . –55�C to +125�C
Storage Temperature . . . . . . . . . . . . . . . . . . –65�C to +150�C
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicate in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
Package Characteristics
ORDERING GUIDE
CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the ADXL202E features proprietary ESD protection circuitry, permanent damage may occur on
devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
PIN FUNCTION DESCRIPTIONS

Drops onto hard surfaces can cause shocks of greater than 1000g
and exceed the absolute maximum rating of the device. Care
should be exercised in handling to avoid damage.
PIN CONFIGURATIONST
COMXOUT
YFILT
XFILT
VDD
YOUT
BOTTOM VIEW
ADXL202E
–Typical Performance Characteristics*
VOLTS
PERCENT OF PARTS
1.321.361.411.451.491.531.581.621.66

TPC 1.X-Axis Zero g Bias Distribution at XFILT, VDD = 3V
VOLTS
PERCENT OF PARTS
1.311.361.421.481.591.651.53

TPC 2.Y-Axis Zero g Bias Distribution at YFILT, VDD = 3V
V/g
PERCENT OF PARTS
0.1480.1550.1620.1690.1760.1820.189

TPC 3.X-Axis Sensitivity Distribution at XFILT, VDD = 3V
VDD = 3 VVDD = 5 V
VOLTS
PERCENT OF PARTS
2.142.232.312.402.482.572.652.742.82

TPC 4.X-Axis Zero g Bias Distribution at XFILT, VDD = 5V
TPC 5.Y-Axis Zero g Bias Distribution at YFILT, VDD = 5V
V/g
PERCENT OF PARTS
0.280.290.300.320.330.34

TPC 6.X-Axis Sensitivity Distribution at XFILT, VDD = 5V
V/g
PERCENT OF PARTS
0.1480.1550.1620.1690.1760.1820.189

TPC 7.Y-Axis Sensitivity Distribution at YFILT, VDD = 3V
PERCENT DUTY CYCLE/g
PERCENT OF PARTS
11.312.212.7

TPC 8.X-Axis Sensitivity at XOUT, VDD = 3V
PERCENT DUTY CYCLE/g
PERCENT OF PARTS
11.312.212.7

TPC 9.Y-Axis Sensitivity at YOUT, VDD = 3V
VDD = 3 VVDD = 5 V
V/g
PERCENT OF PARTS
0.270.290.300.310.330.340.35

TPC 10.Y-Axis Sensitivity Distribution at YFILT, VDD = 5V
PERCENT DUTY CYCLE/g
PERCENT OF PARTS
12.313.313.8

TPC 11.X-Axis Sensitivity at XOUT, VDD = 5V
TPC 12.Y-Axis Sensitivity at YOUT, VDD = 5V
ADXL202E
TPC 13.Noise Density Distribution, VDD = 3V
TEMPERATURE – �C
SUPPLY CURRENT
mA20406080
0.5

TPC 14.Typical Supply Current vs. Temperature
TPC 15.Rotational Die Alignment
TPC 16.Noise Density Distribution, VDD = 5V
TPC 17.Cross-Axis Sensitivity Distribution
TPC 18.Typical Turn-On Time
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