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ADXL202EB Datasheet(Arkusz danych) 1 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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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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
ADXL202EB
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000
Dual Axis Accelerometer
Evaluation Board
GENERAL DESCRIPTION
The ADXL202EB is a simple evaluation board that allows the
user to quickly evaluate the performance of the ADXL202 dual
axis
± 2 g accelerometer. Only three additional through-hole
passive components must be added, depending on the bandwidth
required in your application. The ADXL202EB has a 5-pin
0.1-inch spaced header for access to all power and signal lines
that may be attached to a prototyping board (breadboard) or wired
via a standard plug. Two holes are provided for mechanical
attachment of the ADXL202EB to your application.
CIRCUIT DESCRIPTION
The schematic and parts list of the ADXL202EB are shown in
Figure 1 and Table I respectively. The minimal application will
require at least one resistor (RSET) added to the board to set the
PWM period (T2). Analog bandwidth may be set by adding
capacitors C2 and C3. Refer to the ADXL202 data sheet for a
complete description of the operation of the accelerometer.
The part layout of the ADXL202EB is shown in Figure 2. The
ADXL202EB has two factory- installed 2200 pF capacitors (C1
and C4) at XFILT and YFILT to satisfy the minimum filter capacitor
specification of the ADXL202. Your application will likely require
narrower bandwidth (and lower noise), in which case a through-
hole capacitor may be added in parallel in the space provided
at C2 and C3 respectively. When calculating the capacitance
required to achieve the desired analog bandwidth do not forget
to subtract the 2200 pF already on the PCB. The pinout descrip-
tion of the ADXL202EB is shown in Table II.
SETTING THE PERIOD OF THE DUTY CYCLE
MODULATOR
The DCM period is set by RSET. Choose a value between 100 k
and 2 M
Ω. See Table III for some typical RSET values.
ADXL202EB
A
C
E
B
VDD
RSET
ADDED
BY
USER
YOUT
COM
ST
C2
ADDED
BY
USER
C1
2200pF
C4
2200pF
C3
ADDED
BY
USER
C5
0.47 F
D
XOUT
1
Figure 1. ADXL202EB Schematic




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