AD7143_EvalBoard| Application Note
Evaluation Board for Programmable Controller for Capacitance Touch Sensors EVAL-AD7143
FEATURES
Easy access to the AD7143 Connects to any PC's USB port Self-contained evaluation system Host microcontroller 8 segment scroll wheel sensor Connection for prototype sensor PCBs Test points for easy access to signals
PRODUCT DESCRIPTION
The AD7143 evaluation board allows the user to evaluate all features of the AD7143. The evaluation software allows the user to test the capacitance sensors, and allows data to be read from and written to the AD7143.
PACKAGE CONTENTS
The AD7143 evaluation board kit contains the following items:
J2 ZIF CONNECTOR
SDA SCLK
APPLICATIONS
Evaluation of the AD7143 Evaluation of range of capacitance sensors
AD7143 evaluation board USB cable
The following are available online at www.analog.com/AD7143: Evaluation software EVAL-AD7143 data sheet Utility program for software serial downloads
J1 EDGE CONNECTOR
VDRIVE SCLK GND INT VCC
EVALUATION BOARD BLOCK DIAGRAM
SDA VCC
P2.5 P2.6
INT
VCC VCC VDRIVE
VDD CIN0 CIN1 CIN2 CIN3 CIN4 CIN5 CIN6 CIN7 15 16 1 2 3 4 5 6
P2.5 P2.6
AD7143
SWITCH MATRIX
POWER-ON RESET LOGIC
S1 RESET TxD RxD 9 VCC PSEN
VDD
SCROLL WHEEL
16-BIT - CDC
CALIBRATION ENGINE CALIBRATION RAM
ADuC841
S2
J4 HEADER CONNECTOR
CONTROL AND DATA REGISTERS
10 GND
ADP3303
CYPRESS USB CONTROLLER S3 VDD D+ D GND J3 USB
VDD
10nF
CSHIELD 7 250kHz SRC 8 EXCITATION SOURCE I2C SERIAL INTERFACE AND CONTROL LOGIC VDRIVE 11 VDRIVE 12 13 SCLK SDA INTERRUPT LOGIC 14 INT S4-A LK3 VCC VDRIVE VDRIVE S4-B 10k 10k
USB NOISE SUPPRESSOR
LK2
S4-C
Figure 1.
Rev. 0
Evaluation boards are only intended for device evaluation and not for production purposes. Evaluation boards as supplied "as is" and without warranties of any kind, express, implied, or statutory including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose. No license is granted by implication or otherwise under any patents or other intellectual property by application or use of evaluation boards. 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 that may result from its use. Analog Devices reserves the right to change devices or specifications at any time without notice. Trademarks and registered trademarks are the property of their respective owners. Evaluation boards are not authorized to be used in life support devices or systems.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 2007 Analog Devices, Inc. All rights reserved.
06583-001
VDD
VCC
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