ADXL202JE Analog Devices Inc, ADXL202JE Datasheet

IC ACCELEROMETER LP 8-CLCC

ADXL202JE

Manufacturer Part Number
ADXL202JE
Description
IC ACCELEROMETER LP 8-CLCC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of ADXL202JE

Axis
X, Y
Acceleration Range
±2g
Sensitivity
312mV/g
Voltage - Supply
3 V ~ 5.5 V
Output Type
Analog
Bandwidth
6kHz
Mounting Type
Surface Mount
Package / Case
8-CLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Interface
-

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a
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 2 g. 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 0.5 ms to 10 ms via a single
resistor (R
Patents Pending
SET
).
Low-Cost 2 g Dual-Axis Accelerometer
The typical noise floor is 200 g√Hz, allowing signals below
2 mg (at 60 Hz bandwidth) to be resolved.
The bandwidth of the accelerometer is set with capacitors C
C
structed by filtering the duty cycle output.
The ADXL202E is available in 5 mm
hermetic LCC package.
C
Y
DC
at the X
OSCILLATOR
3V TO 5.25V
X SENSOR
Y SENSOR
FILT
FUNCTIONAL BLOCK DIAGRAM
COM
V
and Y
DD
with Duty Cycle Output
DEMOD
DEMOD
FILT
ADXL202E
pins. An analog output can be recon-
R
32k
R
32k
FILT
FILT
C
X
X
Y
FILT
FILT
C
Y
ADXL202E
ANALOG
T1
CYCLE
(ADC)
5 mm
DUTY
TO
SELF-TEST
T2
A(g) = (T1/T2 – 0.5)/12.5%
0g = 50% DUTY CYCLE
T2 = R
R
T2
SET
SET
2 mm 8-lead
X
Y
/125M
OUT
OUT
C
O
U
N
R
T
E
X
and
P

Related parts for ADXL202JE

ADXL202JE Summary of contents

Page 1

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 improved version of the ADXL202AQC/JQC. The ADXL202E will measure accelerations with a full-scale range ...

Page 2

... Cross-axis sensitivity is the algebraic sum of the alignment and the inherent sensitivity errors. 5 Defined as the output change from ambient to maximum temperature or ambient to minimum temperature. Specifications subject to change without notice for J Grade only MIN MAX A Acceleration = unless otherwise noted.) 1 TPC ADXL202JE Graph Min Typ ± 2 0.2 ± 0.01 ± 10.5 12.5 DD ...

Page 3

... JC 8-Lead LCC 120°C/W tbd°C/W No. Model of Axes ADXL202JE 2 ADXL202AE 2 CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V 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 ...

Page 4

ADXL202E–Typical Performance Characteristics 1.28 1.32 1.36 1.41 1.45 1.49 1.53 VOLTS 1.25 1.31 1.36 1.42 1.48 VOLTS ...

Page 5

0.142 0.148 0.155 0.162 0.169 0.176 0.182 V 9.50 9.90 10.4 10.8 11.3 11.8 12.2 PERCENT DUTY CYCLE ...

Page 6

ADXL202E 230 250 270 290 310 330 350 NOISE DENSITY – rms 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 –40 – TEMPERATURE – ...

Page 7

C ° ° –0.046 –0.038 –0.029 –0.021 –0.013 –0.004 PERCENT/ C ° 400 300 200 100 0 –100 –200 –300 –50 –25 ...

Page 8

ADXL202E DEFINITIONS T1 Length of the “on” portion of the cycle. T2 Length of the total cycle. Duty Cycle Ratio of the “on” time (T1) of the cycle to the total cycle (T2). Defined as T1/T2 for the ADXL202E/ ADXL210. ...

Page 9

DESIGN PROCEDURE FOR THE ADXL202E The design procedure for using the ADXL202E with a duty cycle output involves selecting a duty cycle period and a filter capacitor. A proper design will take into account the application requirements for bandwidth, signal ...

Page 10

ADXL202E MICROCOMPUTER INTERFACES The ADXL202E is specifically designed to work with low-cost microcontrollers. Specific code sets, reference designs, and applica- tion notes are available from the factory. This section will outline a general design procedure and discuss the various trade-offs ...

Page 11

... MEASURING 360 OF TILT 625 1 possible to measure a full 360° of orientation through gravity by using two accelerometers oriented perpendicular to one another (see Figure 5). When one sensor is reading a maximum change in output per degree, the other is at its minimum. ° USING THE ANALOG OUTPUT The ADXL202E was specifically designed for use with its digital outputs, but has provisions to provide analog outputs as well ...

Page 12

ADXL202E USING THE ADXL202E IN VERY LOW POWER APPLICATIONS An application note outlining low power strategies for the ADXL202E is available. Some key points are presented here possible to reduce the ADXL202E’s average current from 0 ...

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