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CDB5581
TABLE OF CONTENTS
1. INTRODUCTION ....................................................................................................................... 3
1.1 Overview ............................................................................................................................ 4
2. QUICK START .......................................................................................................................... 5
3. HARDWARE DESCRIPTION ................................................................................................... 6
3.1 Absolute Maximum Ratings ............................................................................................... 6
3.2 Power Supply ..................................................................................................................... 6
3.3 Analog Section ................................................................................................................... 6
3.3.1 Analog Input Buffers .............................................................................................. 6
3.3.2 Multiplexer ............................................................................................................. 7
3.3.3 ADC Reset ............................................................................................................ 7
3.3.4 Voltage Reference ................................................................................................ 7
3.3.5 ADC Reference Frequency ................................................................................... 7
3.4 Digital Section .................................................................................................................... 8
3.4.1 Hardware Configuration ........................................................................................ 8
3.4.2 SPI? Serial Port Communications ....................................................................... 8
APPENDIX A. MAXIMIZING THE PERFORMANCE OF THE CS5581 ........................................ 9
A.1 PCB Layout Considerations .............................................................................................. 9
A.2 Hardware Considerations .................................................................................................. 9
APPENDIX B. BILL OF MATERIALS ........................................................................................ 10
APPENDIX C. SCHEMATICS ..................................................................................................... 11
APPENDIX D. LAYER PLOTS ................................................................................................... 16
APPENDIX E. CALIBRATION FUNCTION ................................................................................. 25
APPENDIX E. REVISION HISTORY .......................................................................................... 26
LIST OF FIGURES
Figure 1. CDB5581 Block Diagram ................................................................................................. 4
Figure 2. CDB5581 Board Layout ................................................................................................... 5
Figure 3. Schematic - Block Diagram............................................................................................ 11
Figure 4. Schematic - Power Supplies .......................................................................................... 12
Figure 5. Schematic - Input Buffers and Multiplexer ..................................................................... 13
Figure 6. Schematic - CS5581 ...................................................................................................... 14
Figure 7. Schematic - Configuration & Misc. ................................................................................. 15
Figure 8. Top Silkscreen ............................................................................................................... 16
Figure 9. Top Solder Mask ............................................................................................................ 17
Figure 10. Top Routing.................................................................................................................. 18
Figure 11. Ground Plane ............................................................................................................... 19
Figure 12. Power Plane................................................................................................................. 20
Figure 13. Bottom Solder Mask..................................................................................................... 21
Figure 14. Bottom Silkscreen ........................................................................................................ 22
Figure 15. Top Solder Paste Mask................................................................................................ 23
Figure 16. Bottom Routing ............................................................................................................ 24
LIST OF TABLES
Table 1. Power Supply Connections ............................................................................................... 6
Table 2. Analog Input Connections ................................................................................................. 6
Table 3. Analog Input Channel Selection ........................................................................................ 7
Table 4. Hardware Configuration Signals........................................................................................ 8
Table 5. Serial Interface Connections ............................................................................................. 8
2
DS796DB3
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