CDB4365 Cirrus Logic Inc, CDB4365 Datasheet

EVALUATION BOARD FOR CS4365

CDB4365

Manufacturer Part Number
CDB4365
Description
EVALUATION BOARD FOR CS4365
Manufacturer
Cirrus Logic Inc
Datasheets

Specifications of CDB4365

Number Of Dac's
6
Number Of Bits
24
Outputs And Type
6, Differential
Sampling Rate (per Second)
192k
Data Interface
Serial
Dac Type
Voltage
Voltage Supply Source
Analog and Digital
Operating Temperature
-40°C ~ 85°C
Utilized Ic / Part
CS4365
Description/function
Audio D/A
Operating Supply Voltage
5 V
Product
Audio Modules
For Use With/related Products
CS4365
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
Other names
598-1779
Features
Demonstrates recommended layout and
grounding arrangements
CS8416 receives S/PDIF, & EIAJ-340
compatible digital audio
Headers for external audio input for either PCM
or DSD
Requires only a digital signal source and power
supplies for a complete Digital-to-analog
converter system
http://www.cirrus.com
Clocks and Data
Clocks and Data
Inputs for PCM
Inputs for DSD
®
Digital Audio
Interface
CS8416
Evaluation Board for CS4365
Copyright © Cirrus Logic, Inc. 2008
(All Rights Reserved)
Software Board
Hardware or
Description
The CDB4365 evaluation board is an excellent means
for quickly evaluating the CS4365 24-bit, 48-pin, 6-
channel D/A converter. Evaluation requires an analog
signal analyzer, a digital signal source, a PC for control-
ling the CS4365 (only required for control port mode),
and a power supply. Analog line-level outputs are pro-
vided via RCA phono jacks.
The CS8416 digital audio receiver IC provides the sys-
tem timing necessary to operate the digital-to-analog
converter and will accept S/PDIF and EIAJ-340-com-
patible audio data. The evaluation board may also be
configured to accept external timing and data signals for
operation in a user application during system
development.
ORDERING INFORMATION
CDB4365
CS4365
Control
Analog Outputs
and Filtering
CDB4365
Evaluation Board
DS670DB3
MAY '08

Related parts for CDB4365

CDB4365 Summary of contents

Page 1

... Inputs for DSD Clocks and Data http://www.cirrus.com Description The CDB4365 evaluation board is an excellent means for quickly evaluating the CS4365 24-bit, 48-pin, 6- channel D/A converter. Evaluation requires an analog signal analyzer, a digital signal source for control- ling the CS4365 (only required for control port mode), and a power supply ...

Page 2

... INPUT FOR CONTROL DATA ............................................................................................................... 4 5. POWER SUPPLY CIRCUITRY ............................................................................................................... 5 6. GROUNDING AND POWER SUPPLY DECOUPLING .......................................................................... 5 7. ANALOG OUTPUT FILTERING ............................................................................................................. 5 8. PERFORMANCE PLOTS ....................................................................................................................... 7 9. CDB4365 SCHEMATICS ..................................................................................................................... 17 10. REVISION HISTORY ......................................................................................................................... 30 LIST OF FIGURES Figure 1.FFT (48 kHz, 0 dB) ....................................................................................................................... 7 Figure 2.FFT (48 kHz, -60 dB) .................................................................................................................... 7 Figure 3.FFT (48 kHz, No Input) ................................................................................................................. 7 Figure 4 ...

Page 3

... Figure 47.Analog Outputs ............................................................................................................ 21 Figure 48.CS8416 S/PDIF Input ............................................................................................................... 22 Figure 49.PCM Input Header and Muxing ................................................................................................. 23 Figure 50.DSD Input Header ..................................................................................................................... 24 Figure 51.Control Input ............................................................................................................................. 25 Figure 52.Power Inputs ............................................................................................................................. 26 Figure 53.Silkscreen Top .......................................................................................................................... 27 Figure 54.Top Side .................................................................................................................................... 28 Figure 55.Bottom Side .............................................................................................................................. 29 LIST OF TABLES Table 1. System Connections .................................................................................................................... 5 Table 2. CDB4365 Jumper Settings ............................................................................................................ 6 DS670DB3 CDB4365 3 ...

Page 4

... The evaluation board also allows the user to supply external PCM or DSD clocks and data through PCB headers for system development. The CDB4365 uses the CDB4385 as a base PCB board. For this reason, there may be additional circuitry on board which is not populated as it has no function for this device. ...

Page 5

... CS4365 as possible. Extensive use of ground plane fill in the evaluation board yields large reductions in radiated noise. 7. ANALOG OUTPUT FILTERING The analog output on the CDB4365 has been designed according to the CS4365 datasheet. This output circuit in- cludes an active 2-pole, 50-kHz filter which uses the multiple-feedback topology. CONNECTOR ...

Page 6

... RX(CS8416), closed = EXT(J11) Selects 128x (open) or 256x (*closed) MCLK/LRCK ratio 7 8 For PCM input set to *Open, for DSD set to Closed *Default Factory Settings Table 2. CDB4365 Jumper Settings CDB4365 FUNCTION SELECTED Reserved for factory use only Default: M0, M4 open (HI) M1, M2, M3 closed (LO) ...

Page 7

... 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 ( kHz) with default board settings and nominal datasheet voltages applied unless otherwise noted ...

Page 8

... Figure 8. 48 kHz, THD+N vs. Level + -40 -20 +0 Figure 10. 48 kHz, Frequency Response CDB4365 10k 12k 14k 16k 18k Hz Figure 6. FFT (IMD 48 kHz) -80 -60 -40 -20 dBFS 100 200 500 DS670DB3 20k +0 10k 20k ...

Page 9

... Hz Figure 11. 48 kHz, Crosstalk 3 2.5 2 1.5 1 500m V 0 -500m -1 -1 500u 1m 1.5m sec Figure 13. 48 kHz, Impulse Prefilter DS670DB3 3 2.5 2 1.5 1 500m 0 V -500m -1 -1 10k 20k 0 500u Figure 12. 48 kHz, Impulse Response 2m 2.5m 3m CDB4365 1m 1.5m 2m 2.5m 3m sec 9 ...

Page 10

... Hz Figure 15. FFT (96 kHz, 0 dB) 10 Figure 14. 48 kHz Dynamic Range +0 -10 -20 -30 -40 -50 - -70 r -80 A -90 -100 -110 -120 -130 -140 -150 2k 5k 10k 20k 20 50 Figure 16. FFT (96 kHz, -60 dB) CDB4365 100 200 500 10k Hz DS670DB3 20k ...

Page 11

... B - -70 -80 -90 -100 -110 -120 2k 5k 10k 20k -120 Figure 22. 96 kHz, THD+N vs. Level CDB4365 20k 40k 60k 80k 100k 10k 12k 14k 16k Hz Figure 20. FFT (IMD 96 kHz) -100 -80 -60 -40 -20 dBFS 120k 18k 20k +0 11 ...

Page 12

... Figure 27. 96 kHz, Impulse Prefilter -40 -20 +0 Figure 24. 96 kHz, Frequency Response 3 2.5 2 1.5 1 500m 0 V -500m -1 -1 250u 2k 5k 10k 20k Figure 26. 96 kHz, Impulse Response 1m 1.25m 1.5m CDB4365 100 200 500 10k Hz 500u 750u 1m 1.25m sec DS670DB3 20k 1.5m ...

Page 13

... Hz Figure 29. FFT (192 kHz, 0 dB) DS670DB3 Figure 28. Dynamic Range 96 kHz +0 -10 -20 -30 -40 -50 - -70 r -80 A -90 -100 -110 -120 -130 -140 -150 2k 5k 10k 20k 20 50 Figure 30. FFT (192 kHz, -60 dB) CDB4365 100 200 500 10k Hz 20k 13 ...

Page 14

... Figure 34. FFT (IMD 192 kHz) +0 -10 -20 -30 - -70 -80 -90 -100 -110 -120 2k 5k 10k 20k -120 -100 Figure 36. 192 kHz, THD+N vs. Level CDB4365 40k 60k 80k 100k 10k 12k 14k 16k 18k Hz -80 -60 -40 -20 dBFS DS670DB3 120k 20k +0 ...

Page 15

... Figure 41. 192 kHz, Impulse Prefilter DS670DB3 + -40 - Figure 38. 192 kHz, Frequency Response 3 2.5 2 1.5 1 500m 0 V -500m -1 -1 10k 20k Figure 40. 192 kHz, Impulse Response 600u CDB4365 100 200 500 10k Hz 200u 400u 600u sec 20k 15 ...

Page 16

... Figure 42. Dynamic Range 192 kHz CDB4365 DS670DB3 ...

Page 17

... CDB4365 SCHEMATICS PCM HEADER Figure 49 on page 23 PCM Clocks/Data PCM mux PCM Clocks/Data Figure 49 on page 23 CS8416 S/PDIF Input Figure 48 on page 22 Hardware Control Switches Figure 51 on page 25 Serial Control Port Figure 51 on page C/SPI Header CS4365 PCM Clocks/Data DSD clk_enable ...

Page 18

Figure 44. CS4365 ...

Page 19

... DS670DB3 Figure 45. Analog Outputs CDB4365 19 ...

Page 20

... Figure 46. Analog Outputs CDB4365 DS670DB3 ...

Page 21

... Figure 47. Analog Outputs DS670DB3 CDB4365 21 ...

Page 22

Figure 48. CS8416 S/PDIF Input ...

Page 23

Figure 49. PCM Input Header and Muxing ...

Page 24

Figure 50. DSD Input Header ...

Page 25

Figure 51. Control Input ...

Page 26

Figure 52. Power Inputs ...

Page 27

Figure 53. Silkscreen Top ...

Page 28

Figure 54. Top Side ...

Page 29

Figure 55. Bottom Side ...

Page 30

... Cirrus Logic, Cirrus, and the Cirrus Logic logo designs are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trademarks or service marks of their respective owners. DSD is a registered trademark of Sony Kabushiki Kaisha TA Sony Company. I² registered trademark of Philips Semiconductor. SPI is a trademark of Motorola, Inc. 30 Changes Section 4. Input for Control Data www.cirrus.com. CDB4365 DS670DB3 ...

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