Cirrus-logic CDB3308 Manual de usuario descargar pdf

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Evaluation Board for CS3308

Features

 Single-ended Analog Inputs

 Single-ended Analog Outputs

 Supports AC and DC-Coupled Analog I/O

 Flexible Serial Control I/O Headers

– Serial Control Input Header to

Accommodate On-board and External

Serial Controllers

– Serial Control Output Headers for

“Chaining” Serial Control Across Multiple

CDB3308 Evaluation Boards

– 3.3 V Logic Interface Level

 Demonstrates Recommended Layout and

Grounding Arrangements

 Minimal Power Supply Requirements

– ±5 V and Ground

 Windows

Compatible Software Interface

– Easy and Intuitive Graphical Interface to

Channel and Master Volume Controls

– Supports USB and RS-232 PC

Connectivity

Description

The CDB3308 evaluation board is an excellent means

for evaluating the CS3308 analog volume control. Eval-

uation requires an analog signal source and analyzer,

power supplies, and a Windows PC compatible

computer.

Standard RCA phono jacks are provided to easily inter-

face external analog signals with the evaluation board.

Each of the CS3308’s inputs and outputs may be inde-

pendently AC or DC-coupled to their respective I/O

connectors.

The Windows software provides a GUI to make config-

uration of the CDB3308 easy. The software

communicates through the PC’s USB or Serial port to

configure the control port registers so that all features of

the CS3308 can be evaluated.

As an alternative to the serial control provided via a PC,

the evaluation board may be configured to accept exter-

nal control signals for operation in a user application

during system development.

To facilitate multi-CS3308 system design efforts, head-

ers are provided for connecting serial control signals

between multiple CDB3308 evaluation boards.

ORDERING INFORMATION

CDB3308 Evaluation Board

CS3308

8-Channel

Digitally Controlled

Analog Volume Control

8-Channel

Passive

Inputs

AC/DC

Coupling

AC/DC

Coupling

8-Channel

Passive

Outputs

USB/RS232

PC Interface

PC or External

Serial Control Input

External

Serial Control Output

CDB3308

MAY '06

DS702DB2

1 2 3 4 5 6 ... 15 16

Indice de contenidos

Pagina 1 - Evaluation Board for CS3308

Pagina 2 - TABLE OF CONTENTS

10 DS702DB2CDB33086. CDB SCHEMATICSFigure 8. CS3308Schematic Page 1

Pagina 3 - 1. SYSTEM OVERVIEW

DS702DB2 11CDB3308Figure 9. Analog Inputs and OutputsSchematic Page 2

Pagina 4 - 1.7 PC Interfaces

12 DS702DB2CDB3308Figure 10. Serial Control / PowerSchematic Page 3

Pagina 5 - 2. PC SOFTWARE CONTROL

DS702DB2 13CDB33087. CDB LAYOUTFigure 11. Silkscreen TopCDB3308±5V

Pagina 6 - 2.2 Register Maps Tab

14 DS702DB2CDB3308Figure 12. Top Side Copper Layer

Pagina 7 - 3. PERFORMANCE PLOTS

DS702DB2 15CDB3308Figure 13. Bottom Side Copper Layer

Pagina 8

16 DS702DB2CDB33088. REVISION HISTORYRelease ChangesDB1 Initial ReleaseDB2 Updated performance plots shown in Figures 3 - 6 on page 7.Contacting Cirru

Pagina 9 - 5. CDB BLOCK DIAGRAM

2 DS702DB2CDB3308TABLE OF CONTENTS1. SYSTEM OVERVIEW ...

Pagina 10 - 6. CDB SCHEMATICS

DS702DB2 3CDB33081. SYSTEM OVERVIEWThe CDB4265 evaluation board is an excellent means for evaluating the CS3308 digitally controlled analog volumecont

Pagina 11 - DS702DB2 11

4 DS702DB2CDB3308The 10-pin, 2 column header, J88, provides unidirectional output access to the CS3308’s SPI MOSI andCCLK signals, as well as its AD0,

Pagina 12 - 12 DS702DB2

DS702DB2 5CDB33082. PC SOFTWARE CONTROLThe CDB3308 is designed for use with the Microsoft Windows based FlexGUI graphical user interface. This inter-f

Pagina 13 - 7. CDB LAYOUT

6 DS702DB2CDB33082.2 Register Maps TabThe Register Maps tab provides an easy register-level interface to the on-board devices. Register valuescan be m

Pagina 14 - 14 DS702DB2

DS702DB2 7CDB33083. PERFORMANCE PLOTS(TA= +25 ºC, VA+ = +5 V, VA- = -5 V, VD = +3.3 V, RL=100kΩ, CL=20pF, VIN=2VRMS, FIN=1kHz,Gain = 0 dB, Measurement

Pagina 15 - DS702DB2 15

8 DS702DB2CDB33084. SYSTEM CONNECTIONS & JUMPERSConnector NameReference DesignatorSignal Direction Connector FunctionGND J5 Input Ground reference

Pagina 16 - 8. REVISION HISTORY

DS702DB2 9CDB33085. CDB BLOCK DIAGRAMFigure 7. Block DiagramCS33088-ChannelDigitally ControlledAnalog Volume Control8-ChannelPassiveInputsAC/DC Coupl