CDB3308 Cirrus Logic

CDB3308 Evaluation Board for CS3308 Features Description The CDB3308 evaluation board is an excellent means Single-ended Analog Inputs for evaluating the CS3308 analog volume control. Eval- Single-ended Analog Outputs uation requires an analog signal source and analyzer, power supplies, and a Windows PC compatible Supports AC and DC-Coupled Analog I/O computer. Flexible Serial Control I/O Headers Standard RCA phono jacks are provided to easily inter- Serial Control Input Header to face external analog signals with the evaluation board. Accommodate On-board and External Each of the CS3308s inputs and outputs may be inde- Serial Controllers pendently AC or DC-coupled to their respective I/O connectors. Serial Control Output Headers for Chaining Serial Control Across Multiple The Windows software provides a GUI to make config- CDB3308 Evaluation Boards uration of the CDB3308 easy. The software communicates through the PCs USB or Serial port to 3.3 V Logic Interface Level configure the control port registers so that all features of Demonstrates Recommended Layout and the CS3308 can be evaluated. Grounding Arrangements As an alternative to the serial control provided via a PC, the evaluation board may be configured to accept exter- Minimal Power Supply Requirements nal control signals for operation in a user application 5 V and Ground during system development. Windows Compatible Software Interface To facilitate multi-CS3308 system design efforts, head- Easy and Intuitive Graphical Interface to ers are provided for connecting serial control signals Channel and Master Volume Controls between multiple CDB3308 evaluation boards. Supports USB and RS-232 PC ORDERING INFORMATION Connectivity CDB3308 Evaluation Board CS3308 8-Channel 8-Channel AC/DC AC/DC Passive Passive 8-Channel Coupling Coupling Inputs Outputs Digitally Controlled Analog Volume Control USB/RS232 PC or External External PC Interface Serial Control Input Serial Control Output Copyright Cirrus Logic, Inc. 2006 MAY 06 (All Rights Reserved) CDB3308 TABLE OF CONTENTS 1. SYSTEM OVERVIEW ............................................................................................................................. 3 1.1 Power ............................................................................................................................................... 3 1.2 Grounding and Power Supply Decoupling ........................................................................................ 3 1.3 CS3308 Analog Volume Control ....................................................................................................... 3 1.4 External Control Headers ................................................................................................................. 3 1.5 Analog Inputs .................................................................................................................................... 4 1.6 Analog Outputs ................................................................................................................................. 4 1.7 PC Interfaces .................................................................................................................................... 4 2. PC SOFTWARE CONTROL ................................................................................................................... 5 2.1 CS3308 Controls Tab ....................................................................................................................... 5 2.2 Register Maps Tab ........................................................................................................................... 6 3. PERFORMANCE PLOTS ....................................................................................................................... 7 4. SYSTEM CONNECTIONS & JUMPERS ................................................................................................8 5. CDB BLOCK DIAGRAM ........................................................................................................................ 9 6. CDB SCHEMATICS .............................................................................................................................. 10 7. CDB LAYOUT ....................................................................................................................................... 13 8. REVISION HISTORY ............................................................................................................................ 16 LIST OF FIGURES Figure 1.CS3308 Controls Tab ................................................................................................................... 5 Figure 2.Register Maps Tab ........................................................................................................................ 6 Figure 3.Frequency Response .................................................................................................................... 7 Figure 4.THD+N vs. Amplitude ................................................................................................................... 7 Figure 5.THD+N vs. Frequency .................................................................................................................. 7 Figure 6.Crosstalk ....................................................................................................................................... 7 Figure 7.Block Diagram ............................................................................................................................... 9 Figure 8.CS3308 ....................................................................................................................................... 10 Figure 9.Analog Inputs and Outputs ......................................................................................................... 11 Figure 10.Serial Control / Power ............................................................................................................... 12 Figure 11.Silkscreen Top .......................................................................................................................... 13 Figure 12.Top Side Copper Layer ............................................................................................................. 14 Figure 13.Bottom Side Copper Layer ........................................................................................................ 15 LIST OF TABLES Table 1. System Connections ..................................................................................................................... 8 Table 2. On-Board Switches ....................................................................................................................... 8 Table 3. System Headers ............................................................................................................................ 8 2 DS702DB2