2DS804RD4
CRD4525-Q1
TABLE OF CONTENTS
1. SYSTEM OVERVIEW ............................................................................................................................. 4
1.1 Power ............................................................................................................................................... 4
1.2 CS4525 Digital Amplifier .................................................................................................................. 4
1.3 CS8416 Digital Audio Receiver ........................................................................................................ 4
1.4 System Clocking .............................................................................................................................. 4
1.5 External Data Headers ..................................................................................................................... 4
1.6 Analog Inputs ................................................................................................................................... 5
1.7 Speaker Outputs .............................................................................................................................. 5
1.8 PC Control ....................................................................................................................................... 5
1.9 Stand-Alone Control ......................................................................................................................... 5
1.10 External Power Stage Interface ..................................................................................................... 6
2. PC SOFTWARE CONTROL ................................................................................................................... 7
2.1 CS4525 Main Controls Tab .............................................................................................................. 7
2.2 CS4525 Aux & Filter Controls Tab ................................................................................................... 8
2.3 S/PDIF Input Controls Tab ............................................................................................................... 9
2.4 Register Maps Tab ......................................................................................................................... 10
2.5 Pre-Configured Script Files ............................................................................................................ 11
2.5.1 Analog In ............................................................................................................................... 11
2.5.2 Optical SPDIF In .................................................................................................................... 11
2.5.3 Coaxial SPDIF In ................................................................................................................... 11
3. STAND-ALONE MODE CONTROL ..................................................................................................... 12
4. GROUNDING AND POWER SUPPLY DECOUPLING ........................................................................ 12
4.1 Power Supply Decoupling .............................................................................................................. 12
4.2 Electromagnetic Interference (EMI) ............................................................................................... 12
4.2.1 Suppression of EMI at the Source .........................................................................................13
5. SYSTEM CONNECTIONS & JUMPERS .............................................................................................. 14
6. CRD SCHEMATICS .............................................................................................................................. 15
7. CRD LAYOUT ...................................................................................................................................... 18
8. PERFORMANCE PLOTS ..................................................................................................................... 23
9. THERMAL DE-RATING ........................................................................................................................ 29
10. ELECTROMAGNETIC COMPLIANCE (EMC) PERFORMANCE ...................................................... 30
10.1 EMI Testing Procedures .............................................................................................................. 30
10.2 System Configuration ................................................................................................................... 31
10.3 CRD4525-Q1 Test Results .......................................................................................................... 31
11. REVISION HISTORY .......................................................................................................................... 32
LIST OF FIGURES
Figure 1.Speaker Terminal Configuration ................................................................................................... 5
Figure 2.CS4525 Main Controls Tab ........................................................................................................... 7
Figure 3.CS4525 Aux & Filter Controls Tab ................................................................................................ 8
Figure 4.S/PDIF Input Controls Tab ............................................................................................................ 9
Figure 5.Register Maps Tab ...................................................................................................................... 10
Figure 6.CS4525 - Schematic Page 1 ....................................................................................................... 15
Figure 7.USB Microcontroller & Tactile Control - Schematic Page 2 ........................................................ 16
Figure 8.Power & I/O Connections - Schematic Page 3 ........................................................................... 17
Figure 9.Component Map ......................................................................................................................... 18
Figure 10.Top-Side Copper Layer ............................................................................................................. 19
Figure 11.Inner Copper Layer 1 ................................................................................................................ 20
Figure 12.Inner Copper Layer 2 ................................................................................................................ 21
Figure 13.Bottom-Side Copper Layer ....................................................................................................... 22
Figure 14.Frequency Response ................................................................................................................ 23
Figure 15.THD+N vs. Power ..................................................................................................................... 24
