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ADXL202EB Datasheet(Arkusz danych) 2 Page - Analog Devices

Numer części ADXL202EB
Szczegółowy opis  Dual Axis Accelerometer Evaluation Board
Pobierz  2 Pages
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
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REV. 0
–2–
ADXL202EB
Table II. ADXL202EB Pinout Description
Pin Reference
Pinout
E
GROUND
B
SELF-TEST INPUT
D
X AXIS DUTY CYCLE OUT
C
Y AXIS DUTY CYCLE OUT
A
+V SUPPLY (3 V dc to
5.25 V dc)
Table III. DCM Period vs. RSET Value
T2 Period
RSET
1 ms
124 k
2 ms
248 k
5 ms
620 k
10 ms
1.24 M
Table IV. Typical XFILT and YFILT Values vs. Bandwidth and
Noise Performance
XFILT, YFILT
Bandwidth
RMS Noise
0.01
µF
500 Hz
12.7 mg
0.047
µF
100 Hz
7 mg
0.1
µF
50 Hz
4.2 mg
0.47
µF
10 Hz
2.3 mg
Table I. ADXL202EB Parts List
Reference
Value
Function
C1
2200 pF/25 V
XFILT. Sets X axis analog bandwidth along with C2
C2
Added by User
XFILT. Sets X axis analog bandwidth along with C1
C3
Added by User
YFILT. Sets Y axis analog bandwidth along with C4
C4
2200 pF/25 V
YFILT. Sets Y axis analog bandwidth along with C3
J1
Connector
All power and signal connection through J1
R1
Added by User
RSET. Sets the PWM period (T2)
U1
ADXL202
Dual axis
±2g accelerometer
SETTING THE ADXL202’s BANDWIDTH
The ADXL202EB is supplied with the minimum specified XFILT
and YFILT values installed. Your application will likely require a
narrower bandwidth to improve noise performance. See Table
IV for some typical capacitor values.
C5
C4
C2
RSET
J1
A
C
EB
D
C1
U1
C3
Figure 2. ADXL202EB Part Layout (Top View)
SPECIAL NOTES ON HANDLING
Note that the ADXL202EB is not reverse polarity protected.
Reversing the +VSUPPLY and Ground pins will damage the
ADXL202.
Dropping the ADXL202EB on a hard surface may generate
several thousand g of acceleration. Enough to damage the accel-
erometer. Please refer to the ADXL202 data sheet for information
on shock survivability.




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