EVAL-AD7156EBZ Analog Devices Inc, EVAL-AD7156EBZ Datasheet

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EVAL-AD7156EBZ

Manufacturer Part Number
EVAL-AD7156EBZ
Description
Evaluation Board I.c.
Manufacturer
Analog Devices Inc
Datasheets

Specifications of EVAL-AD7156EBZ

Sensor Type
Touch, Capacitive
Interface
I²C
Voltage - Supply
1.8 V ~ 3.6 V
Embedded
No
Utilized Ic / Part
AD7156
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Sensitivity
-
Sensing Range
-
Lead Free Status / Rohs Status
Supplier Unconfirmed
GENERAL DESCRIPTION
This data sheet describes the AD7156 evaluation board and PC
software.
Additional details about the
capacitance-to-digital converter (CDC) are available in the
AD7156 data sheet, which should be consulted in conjunction
with this data sheet when using the EVAL-AD7156.
More information about the Analog Devices, Inc., family of
CDC products can be found at www.analog.com/CDC.
EVALUATION BOARD DESCRIPTION
The AD7156 evaluation kit is a powerful tool for exploring and
evaluating the AD7156 features at many different levels.
Rev. 0
Evaluation
Evaluation
statutory in
particular p
intellectu
Devices is
Devices fo
from its use
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.
al property by application or use of evaluation boards. Information furnished by Analog
r its use, nor for any infringements of patents or other rights of third parties that may result
believed to be accurate and reliable. However, no responsibility is assumed by Analog
boards are supplied “as is” and without warranties of any kind, express, implied, or
boards are only intended for device evaluation and not for production purposes.
urpose. No license is granted by implication or otherwise under any patents or other
cluding, but not limited to, any implied warranty of merchantability or fitness for a
. Analog Devices reserves the right to change devices or specifications at any time
AD7156,
an ultralow power, 2-channel
Ultralow Power Capacitance Converter
Figure 1. AD7156 Evaluation Board
One Technology Way, P.O. Box 9106, Norwood, MA 02062-910
Tel: 781.329.4700
Fax: 781.461.3113
The board is connected to a PC via a standard USB interface.
The PC software allows the graphical display of real-time data,
modification of the AD7156 internal settings, and generally
assists in understanding the part features and performance.
The flexible interface structure of the evaluation board allows it
to be connected in several useful configurations. For example, the
digital section of the evaluation board can be used indepen-
dently as a convenient digital interface for a user’s own sensor
design PCB or as a module containing the AD7156. Alternatively,
an external microcontroller can be interfaced to the AD7156. Thus,
the evaluation board can act as a complete analog front end for
creating and debugging software on the user’s own digital
platform.
Evaluation Kit for AD7156
©2009 Analog Devices, Inc. All rights reserved.
EVAL-AD7156
www.analog
6, U.S.A.
.com

Related parts for EVAL-AD7156EBZ

EVAL-AD7156EBZ Summary of contents

Page 1

... 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. Evaluation Kit for AD7156 Ultralow Power Capacitance Converter The board is connected via a standard USB interface ...

Page 2

... Starting the Evaluation Software ................................................ 5 Data Acquisition Window ........................................................... 5 REVISION HISTORY 6/09—Revision 0: Initial Version   Setup Window ...............................................................................6   Mode of Operation ........................................................................6   Capacitive Input Settings ..............................................................8   Evaluation Board Schematic and Artwork .................................. 10   Component ID ............................................................................ 12   Layout .......................................................................................... 12   Ordering Information .................................................................... 13   Bill of Materials ........................................................................... 13   Ordering Guide .......................................................................... 14   ...

Page 3

... EVALUATION SOFTWARE INSTALLATION Install the AD7156 evaluation board software before connecting the AD7156 evaluation board to the PC so, complete the following steps: Please install software before connecting board to USB port! E valuation kit docum entation including installation guideline found in file A D 7156E B .pdf on this C D ...

Page 4

... EVAL-AD7156 EVALUATION BOARD HARDWARE POWER SUPPLY To use the AD7156 evaluation board, make sure that the link on the supply header (J7 place, either in V_EVB when using the on-board voltage supply or in V_EXT when using an external voltage source via J8. In both cases, the LED labeled POWER on the board should turn on when connected to either of the supply sources ...

Page 5

... Clicking the green Start Acquisition button in the AD7156 evaluation software window starts the data acquisition. The LED labeled RUN on the evaluation board turns on, the RUN indicator in the top right corner of the software window turns on red, and graphs in the software start displaying the measured data. ...

Page 6

... V and 3.6 V. The default setting for the supply voltage is 3.3 V. Figure 10. AD7156 Evaluation Software Setup Window OK When OK is clicked, the evaluation software writes the current settings into the AD7156 registers, the setup window closes, and the software returns to the data acquisition window. Cancel ...

Page 7

... The out-window threshold has two thresholds, one above and one below the average. A change on the input is indicated when TIME the input data goes either above the positive threshold or below the negative threshold. INPUT CAPACITANCE TIME Rev Page EVAL-AD7156 POSITIVE CHANGE POSITIVE THRESHOLD INPUT OUTPUT ACTIVE OUTPUT Capacitance ...

Page 8

... EVAL-AD7156 CAPACITIVE INPUT SETTINGS The AD7156 has two capacitive input channels that can be set 2 up independently via the I C-compatible interface. These AD7156 settings are described in the following sections and are valid for both channels. Figure 18. AD7156 Capacitive Input Setup Ch1, Ch2 The Ch1 and Ch2 boxes allow you to enable or disable the capacitive input channels individually ...

Page 9

... The CapDAC Auto box enables the autoDAC function, which ensures that the data input stays within 25% to 75% of the selected capacitive input range. The CapDAC Value box contains the current CAPDAC value set by the autoDAC. It also allows you to set the value when the autoDAC function is disabled. Rev Page EVAL-AD7156 ...

Page 10

... EVAL-AD7156 EVALUATION BOARD SCHEMATIC AND ARTWORK Figure 23. AD7156 Evaluation Board Schematic—Analog Part Rev Page 08159-022 ...

Page 11

... Figure 24. AD7156 Evaluation Board Schematic—Digital Part Rev Page EVAL-AD7156 08159-023 ...

Page 12

... EVAL-AD7156 COMPONENT ID LAYOUT Figure 25. AD7156 Evaluation Board Layout—Silkscreen Figure 26. AD7156 Evaluation Board Layout—Component Side Rev Page ...

Page 13

... B1 1 Clip for 9 V battery, PCB mounting 4 Feet, stick-on, 9.5 mm diameter, 3.8 mm height , kb, 8-DFN , SOT-23-6 Q Rev Page EVAL-AD7156 Manufacturer Part No. EVAL-AD7156EBZ Analog Devices AD7156BCPZ Analog Devices AD5259BCPZ Analog Devices ADP1720ARMZ Analog Devices ADG884BRMZ-REEL7 Not inserted Not inserted Cypress CY7C68013A-56LFXC Microchip 24LC64T-I/MC Analog Devices ADP3330ARTZ3 ...

Page 14

... EVAL-AD7156 ORDERING GUIDE Model Description EVAL-AD7156EBZ 1 Evaluation Board RoHS Compliant Part. ESD CAUTION Rev Page ...

Page 15

... NOTES Rev Page EVAL-AD7156 ...

Page 16

... EVAL-AD7156 NOTES 2 Purchase of licensed I C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I 2 Rights to use these components system, provided that the system conforms to the I ©2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners ...

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