Cirrus-logic CDB5566 Manuel d'utilisateur

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Copyright Cirrus Logic, Inc. 2009
(All Rights Reserved)
www.cirrus.com
CDB5566
5 kSps, 24-bit, High-throughput
ΔΣ
ADC
Evaluation Board
Features
Two Analog Input Channels Multiplexed to the CS5566 ADC
Pre-configured to require a minimum number of external
connections to your data acquisition system.
All functionality accessible through the connector interface
and board-level options.
On-board 4.096 V Reference
Pre-configured for Master mode SPI™ communication to a
data capture system.
General Description
The CDB5566 is a versatile tool designed for evaluating the func-
tionality and performance of the CS5566 ADC (Analog-to-Digital
Converter). The SPI serial port on the CDB5566 evaluation board
is configured in Master mode and will start transmitting data after
power-up upon reset. This evaluation board is designed to connect
to your data capture system or will interface to the CapturePlus II
data acquisition system available from Cirrus Logic.
The CS5566 delta-sigma ADC produces fully settled conversions to
full specified accuracy at 5 kSps. This ability to produce fully settled
conversions for every sample makes it suitable for converting multi-
plexed input signals. To help evaluate this feature, the CDB5566
includes two differential analog inputs multiplexed into the CS5566.
The multiplexer can be switched at the CS5566 ADC sample speed
and the ADC will produce fully settled conversion data for each input
channel.
All evaluation board functionality for evaluating the CS5566 ADC is
accessed through the connector interface and board-level options.
Schematics in PADS™ PowerLogic™ format are available for
download at:
http://www.cirrus.com/en/products/pro/detail/P1120.html
.
ORDERING INFORMATION
CDB5566 Evaluation Board
OCT ‘09
DS806DB3
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Résumé du contenu

Page 1 - Evaluation Board

Copyright  Cirrus Logic, Inc. 2009(All Rights Reserved)www.cirrus.comCDB55665 kSps, 24-bit, High-throughput ΔΣ ADCEvaluation BoardFeatures Two Analo

Page 2 - LIST OF TABLES

CDB556610 DS806DB3APPENDIX B. BILL OF MATERIALS CIRRUS LOGICCDB5566-Z_REV_C1.PLBILL OF MATERIALItem Cirrus P/N Rev Descript

Page 3 - 1. INTRODUCTION

CDB5566DS806DB3 11APPENDIX C. SCHEMATICS Figure 3. Schematic - Block Diagram

Page 4 - 1.1 Overview

CDB556612 DS806DB3 Figure 4. Schematic - Power Supplies

Page 5 - DC Supply

CDB5566DS806DB3 13 Figure 5. Schematic - Input Buffers and Multiplexer

Page 6 - 3.3.1 Analog Input Buffers

CDB556614 DS806DB3 Figure 6. Schematic - CS5566

Page 7 - 3.3.5 ADC Reference Frequency

CDB5566DS806DB3 15 Figure 7. Schematic - Configuration & Misc.

Page 8 - 3.4.1 Hardware Configuration

CDB556616 DS806DB3APPENDIX D. LAYER PLOTS CDB5566Figure 8. Top SilkscreenCalibration function has been rem

Page 9 - A.2 Hardware Considerations

CDB5566DS806DB3 17 Figure 9. Top Solder Mask

Page 10 - 10 DS806DB3

CDB556618 DS806DB3 Figure 10. Top Routing

Page 11 - DS806DB3 11

CDB5566DS806DB3 19 Figure 11. Ground Plane

Page 12 - 12 DS806DB3

CDB55662 DS806DB3TABLE OF CONTENTS1. INTRODUCTION ...

Page 13 - DS806DB3 13

CDB556620 DS806DB3 Figure 12. Power Plane

Page 14 - Figure 6. Schematic - CS5566

CDB5566DS806DB3 21 Figure 13. Bottom Solder Mask

Page 15 - DS806DB3 15

CDB556622 DS806DB3 Figure 14. Bottom Silkscreen

Page 16 - 16 DS806DB3

CDB5566DS806DB3 23 Figure 15. Top Solder Paste Mask

Page 17 - Figure 9. Top Solder Mask

CDB556624 DS806DB3 Figure 16. Bottom Routing

Page 18 - Figure 10. Top Routing

CDB5566DS806DB3 25APPENDIX E. CALIBRATION FUNCTIONThe calibration function has been removed from the CS5566. All references to calibration have been r

Page 19 -

CDB556626 DS806DB3REVISION HISTORY Revision Date ChangesDB1 SEP 2007 Initial Release.DB2 DEC 2007 Changed op amps to

Page 20 - Figure 12. Power Plane

CDB5566DS806DB3 31. INTRODUCTIONThe CDB5566 evaluation board is a platform for evaluating the CS5566 ADC performance. The evalua-tion board is design

Page 21 - DS806DB3 21

CDB55664 DS806DB31.1 OverviewThe CDB5566 evaluation board has both analog and digital circuit sections. The analog section consistsof the CS5566 ADC,

Page 22 - Figure 14. Bottom Silkscreen

CDB5566DS806DB3 52. QUICK START The CDB5566 evaluation board is designed to interface with a data acquisition system. To conne

Page 23 - DS806DB3 23

CDB55666 DS806DB33. HARDWARE DESCRIPTION3.1 Absolute Maximum RatingsObserve the following limits to ensure the CDB5566 component ratings are not excee

Page 24 - Figure 16. Bottom Routing

CDB5566DS806DB3 7For detailed information on the LMP7732 precision industrial op-amps, please visit National Semiconduc-tor’s website at www.national.

Page 25 - DS806DB3 25

CDB55668 DS806DB33.4 Digital Section3.4.1 Hardware ConfigurationThe CDB5566 evaluation board hardware comes pre-configured so the only connection requ

Page 26

CDB5566DS806DB3 9APPENDIX A. MAXIMIZING THE PERFORMANCE OF THE CS5566A.1 PCB Layout Considerations• Keep the signal path short between the CS5566 ADC

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