Instruction Manual
Table Of Contents
- Table of Contents
- List of Figures
- List of Tables
- 1. CDB4349 System Overview
- 2. CS4349 Digital-to-Analog Converter
- 3. CS8416 Digital Audio Receiver
- 4. Input for Clocks and Data
- 5. Input for Control Data
- 6. Power Supply Circuitry
- 7. Grounding and Power Supply Decoupling
- 8. Analog Output Filtering
- 9. Board Connections and Settings
- 10. Performance Plots
- Figure 1. FFT 0 dBFS, FS = 48 kHz
- Figure 2. FFT -60 dBFS, FS = 48 kHz
- Figure 3. FFT No Input, FS = 48 kHz
- Figure 4. FFT No Input Out of Band, FS = 48 kHz
- Figure 5. Frequency Response 0 dBFS, FS = 48 kHz
- Figure 6. THD+N vs Frequency 0 dBFS, FS = 48 kHz
- Figure 7. THD+N vs Level 1 kHz, FS = 48 kHz
- Figure 8. Fade-to-Noise Linearity 1 kHz, FS = 48 kHz
- Figure 9. Impulse Response, FS = 48 kHz
- Figure 10. FFT Crosstalk Ch. A to Ch. B 1 kHz, FS = 48 kHz
- Figure 11. FFT Crosstalk Ch. B to Ch. A 1 kHz, FS = 48 kHz
- Figure 12. FFT 0 dBFS, FS = 96 kHz
- Figure 13. FFT -60 dBFS, FS = 96 kHz
- Figure 14. FFT No Input, FS = 96 kHz
- Figure 15. FFT No Input Out of Band, FS = 96 kHz
- Figure 16. Frequency Response 0 dBFS, FS = 96 kHz
- Figure 17. THD+N vs Frequency 0 dBFS, FS = 96 kHz
- Figure 18. THD+N vs Level 1 kHz, FS = 96 kHz
- Figure 19. Fade-to-Noise Linearity 1 kHz, FS = 96 kHz
- Figure 20. Impulse Response, FS = 96 kHz
- Figure 21. FFT Crosstalk Ch. A to Ch. B 1 kHz, FS = 96 kHz
- Figure 22. FFT Crosstalk Ch. B to Ch. A 1 kHz, FS = 96 kHz
- Figure 23. FFT 0 dBFS, FS = 192 kHz
- Figure 24. FFT -60 dBFS, FS = 192 kHz
- Figure 25. FFT No Input, FS = 192 kHz
- Figure 26. FFT No Input Out of Band, FS = 192 kHz
- Figure 27. Frequency Response 0 dBFS, FS = 192 kHz
- Figure 28. THD+N vs Frequency 0 dBFS, FS = 192 kHz
- Figure 29. THD+N vs Level 1 kHz, FS = 192 kHz
- Figure 30. Fade-to-Noise Linearity 1 kHz, FS = 192 kHz
- Figure 31. Impulse Response, FS = 192 kHz
- Figure 32. FFT Crosstalk Ch. A to Ch. B 1 kHz, FS = 192 kHz
- Figure 33. FFT Crosstalk Ch. B to Ch. A 1 kHz, FS = 192 kHz
- 11. Schematics
- 12. Layout
- 13. Revision History
DS782DB1 5
CDB4349
6. POWER SUPPLY CIRCUITRY
Power is supplied to the evaluation board by three binding posts (GND, +12V, and -12V), as shown in Figure 40.
The ‘+12V’ and ‘-12V’ terminals supply the active output filters. The +3.3 V and +5.0 V circuitry is powered by reg-
ulators fed by the ‘+12V’ terminal. Headers J3, J4, and J7 allow the user to either select +3.3 V or +5.0 V supplies
for the various CS4349 voltage supply pins. Alternatively, the user can remove the shunts on J3, J4, and J7, and
provide an external power supply.
WARNING: Refer to the CS4349 datasheet for maximum allowable voltage levels. Operation outside of this range
can cause permanent damage to the device.
7. GROUNDING AND POWER SUPPLY DECOUPLING
As with any high-performance converter, the CS4349 requires careful attention to power supply and grounding ar-
rangements in order to optimize performance. Figure 35 details the connections to the CS4349 while Figures 41,
42, and 43 show the component placement and top and bottom layout. The decoupling capacitors are located as
close to the CS4349 as possible. Extensive use of ground plane fill in the evaluation board yields large reductions
in radiated noise.
8. ANALOG OUTPUT FILTERING
The passive output filter on the CDB4349 has been designed according to the CS4349 datasheet.