Cirrus-logic CDB4365 Manuel d'utilisateur Page 7
- Page / 30
- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
DS670DB3 7
CDB4365
8. PERFORMANCE PLOTS
The plots in the following section were acheived using an Audio Precision System 2700 and a randomly chosen pro-
duction CDB4365. In some cases the performance may be limited by the CDB4365. All measurements were taken
at room temp using the standard AP filter options (20 Hz to 22 kHz) with default board settings and nominal
datasheet voltages applied unless otherwise noted.
The impulse response plots were taken both pre-and post filtering as the off-chip filter was degrading the perfor-
mance at higher sample rates. The pre-filter impulse response plots were taken directly at the output pins of the
DAC (with the analog filter still connected) to show the effect of the CDB’s analog filtering on the impulse response
(as the analog filtering adds its own signature to the impulse response of the DAC, and in the case of the higher
sampling rates it was band-limiting it).
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+0
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d
B
r
A
20 20k50 100 200 500 1k 2k 5k 10k
Hz
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+0
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d
B
r
A
20 20k50 100 200 500 1k 2k 5k 10k
Hz
Figure 1. FFT (48 kHz, 0 dB) Figure 2. FFT (48 kHz, -60 dB)
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+0
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B
r
A
20 20k50 100 200 500 1k 2k 5k 10k
Hz
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+0
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d
B
r
A
20k 120k40k 60k 80k 100k
Hz
Figure 3. FFT (48 kHz, No Input) Figure 4. FFT (48 kHz Out-of-Band, No Input)
- Evaluation Board for CS4365 1
- TABLE OF CONTENTS 2
- LIST OF FIGURES 2
- LIST OF TABLES 3
- 3. INPUT FOR CLOCKS AND DATA 4
- 4. INPUT FOR CONTROL DATA 4
- 5. POWER SUPPLY CIRCUITRY 5
- 7. ANALOG OUTPUT FILTERING 5
- 6 DS670DB3 6
- JUMPER / 6
- 8. PERFORMANCE PLOTS 7
- 8 DS670DB3 8
- DS670DB3 9 9
- 10 DS670DB3 10
- DS670DB3 11 11
- 12 DS670DB3 12
- DS670DB3 13 13
- 14 DS670DB3 14
- DS670DB3 15 15
- 16 DS670DB3 16
- 9. CDB4365 SCHEMATICS 17
- 18 DS670DB3 18
- Figure 44. CS4365 18
- DS670DB3 19 19
- 20 DS670DB3 20
- DS670DB3 21 21
- 22 DS670DB3 22
- DS670DB3 23 23
- 24 DS670DB3 24
- Figure 50. DSD Input Header 24
- DS670DB3 25 25
- Figure 51. Control Input 25
- 26 DS670DB3 26
- Figure 52. Power Inputs 26
- DS670DB3 27 27
- Figure 53. Silkscreen Top 27
- 28 DS670DB3 28
- Figure 54. Top Side 28
- DS670DB3 29 29
- Figure 55. Bottom Side 29
- 10.REVISION HISTORY 30
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