Cirrus-logic CS4385 Manuel d'utilisateur

Copyright © Cirrus Logic, Inc. 2008(All Rights Reserved)http://www.cirrus.com114 dB, 192 kHz 8-Channel D/A ConverterFeatures Advanced Multi-bit Delta

10 DS671F2CS4385DAC ANALOG CHARACTERISTICS - AUTOMOTIVE (-DQZ) Test Conditions (unless otherwise specified): VA = 4.75 to 5.25 V; VLS = 1.71 to 5.25 V

DS671F2 11CS4385POWER AND THERMAL CHARACTERISTICS Notes:4. Current consumption increases with increasing Fs within a given speed mode and is signal

12 DS671F2CS4385COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSEThe filter characteristics have been normalized to the sample rate (Fs) and

DS671F2 13CS4385COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE (CONTINUED)DSD COMBINED DIGITAL & ON-CHIP ANALOG FILTER RESPONSEParame

14 DS671F2CS4385DIGITAL CHARACTERISTICSNotes:13. Any pin except supplies. Transient currents of up to ±100 mA on the input pins will not cause SCR lat

DS671F2 15CS4385SWITCHING CHARACTERISTICS - PCMInputs: Logic 0 = GND, Logic 1 = VLS, CL = 20 pF. Notes:14. After powering up, RST should be held low

16 DS671F2CS4385SWITCHING CHARACTERISTICS - DSDLogic 0 = GND; Logic 1 = VLS; CL=20pF. Parameter Symbol Min Typ Max UnitMCLK Duty Cycle 40 - 60 %DS

DS671F2 17CS4385SWITCHING CHARACTERISTICS - CONTROL PORT - I²C FORMATInputs: Logic 0 = GND, Logic 1 = VLC, CL=20pF.Notes:18. Data must be held for suf

18 DS671F2CS4385SWITCHING CHARACTERISTICS - CONTROL PORT - SPI FORMAT Inputs: Logic 0 = GND, Logic 1 = VLC, CL=20pF.Notes:19. tspi is only needed befo

DS671F2 19CS43853. TYPICAL CONNECTION DIAGRAMVLSMCLKVDAOUTA1+8320.1 µF+1 µF+2.5 VSDIN191 µF0.1 µF++2021FILT+VQ76LRCKSCLKSDIN3SDIN239400.1 µF47 µFVA0.1

2 DS671F2CS4385TABLE OF CONTENTS1. PIN DESCRIPTION ...

20 DS671F2CS4385 VLSCS4385MCLKVDAOUTA1+8320.1 µF+1 µF+2.5 VSDIN191 µF0

DS671F2 21CS43854. APPLICATIONS The CS4385 serially accepts two’s complement formatted PCM data at standard audio sample rates including 48,44.1 and 3

22 DS671F2CS43854.2 Mode SelectIn Hardware Mode, operation is determined by the Mode Select pins. The states of these pins are continu-ally scanned fo

DS671F2 23CS43854.3 Digital Interface Formats The serial port operates as a slave and supports the I²S, Left-Justified, Right-Justified, One-Line Mode

24 DS671F2CS43854.3.1 OLM #1OLM #1 serial audio interface format operates in Single-, Double-, or Quad-Speed Mode and will slave toSCLK at 128 Fs. Six

DS671F2 25CS43854.3.3 OLM #3OLM #3 serial audio interface format operates in Single-, Double-, or Quad-Speed Mode and will slave toSCLK at 256 Fs. Eig

26 DS671F2CS43854.3.5 TDMThe TDM serial audio interface format operates in Single-, Double-, or Quad-Speed Mode and will slaveto SCLK at 256 Fs. Data

DS671F2 27CS43854.6 De-EmphasisThe CS4385 includes on-chip digital de-emphasis filters. The de-emphasis feature is included to accommo-date older audi

28 DS671F2CS43854.8 Direct Stream Digital (DSD) Mode In Software Mode, the DSD/PCM bits (Reg. 02h) are used to configure the device for DSD Mode. TheD

DS671F2 29CS43854.9 Grounding and Power Supply ArrangementsAs with any high-resolution converter, the CS4385 requires careful attention to power suppl

DS671F2 3CS43856.2 Mode Control 1 (address 02h) ...

30 DS671F2CS43854.11 The MUTEC OutputsThe MUTEC1 and MUTEC234 pins have an auto-polarity detect feature. The MUTEC output pins are highimpedance at th

DS671F2 31CS43854.12 Recommended Power-Up Sequence4.12.1 Hardware Mode1. Hold RST low until the power supplies and configuration pins are stable, and

32 DS671F2CS43854.12.2 Software Mode1. Hold RST low until the power supply is stable, and the master and left/right clocks are locked to the appropria

DS671F2 33CS43854.14.2.1 I²C WriteTo write to the device, follow the procedure below while adhering to the control port Switching Specifica-tions in S

34 DS671F2CS43854.14.3 SPI ModeIn SPI Mode, data is clocked into the serial control data line, CDIN, by the serial control port clock, CCLK(see Figure

DS671F2 35CS43855. REGISTER QUICK REFERENCE Addr Function 7 6 5 4 3 2 1 001h Chip Revision PART4 PART3 PART2 PART1 PART0 REV REV REVdefault 0 0 0 0 1

36 DS671F2CS438514h Vol. Control A4 A4_VOL7 A4_VOL6 A4_VOL5 A4_VOL4 A4_VOL3 A4_VOL2 A4_VOL1 A4_VOL0default0000000015h Vol. Control B4 B4_VOL7 B4_VOL6

DS671F2 37CS43856. REGISTER DESCRIPTIONNote: All registers are read/write in I²C Mode and write only in SPI, unless otherwise noted.6.1 Chip Revision

38 DS671F2CS43856.2.3 PCM/DSD Selection (DSD/PCM)Default = 00 - PCM1 - DSDFunction:This function selects DSD or PCM Mode. The appropriate data and cl

DS671F2 39CS4385 6.3.2 Functional Mode (FM)Default = 1100 - Single-Speed Mode (4 to 50 kHz sample rates)01 - Double-Speed Mode (50 to 100 kHz sample r

4 DS671F2CS4385LIST OF FIGURESFigure 1.Serial Audio Interface Timing ...

40 DS671F2CS43856.4.2 Direct DSD Conversion (DIR_DSD)Function:When set to 0 (default), DSD input data is sent to the DSD processor for filtering and v

DS671F2 41CS43856.5 Filter Control (address 05h)6.5.1 Interpolation Filter Select (FILT_SEL) Function:When set to 0 (default), the Interpolation Filte

42 DS671F2CS43856.7.2 Channel A Volume = Channel B Volume (Px_A=B) Default = 00 - Disabled1 - EnabledFunction:The AOUTAx and AOUTBx volume levels are

DS671F2 43CS4385Soft Ramp on Zero CrossingSoft Ramp and Zero Cross Enable dictates that signal-level changes, either by attenuation changes ormuting,

44 DS671F2CS43856.8.5 DSD Auto-Mute (DAMUTE) Function:When set to 1 (default), the Digital-to-Analog converter output will mute following the receptio

DS671F2 45CS43856.10 Mixing Control (address 0Ah, 0Dh, 10h, 13h)6.10.1 De-Emphasis Control (PX_DEM1:0)Default = 0000 - Disabled01 - 44.1 kHz10 - 48 kH

46 DS671F2CS43856.11 Volume Control (address 0Bh, 0Ch, 0Eh, 0Fh, 11h, 12h, 14h, 15h)These eight registers provide individual volume and mute control f

DS671F2 47CS43856.12 PCM Clock Mode (address 16h)6.12.1 Master Clock DIVIDE by 2 ENABLE (MCLKDIV) Function:When set to 1, the MCLKDIV bit enables a ci

48 DS671F2CS43857. FILTER PLOTS0.40.50.60.70.80.91−120−100−80−60−40−200Frequency(normalized to Fs)Amplitude (dB)0.40.420.440.460.480.50.520.540.560.58

DS671F2 49CS4385 00.050.10.150.20.250.30.350.40.450.5−0.02−0.015−0.01−0.00500.0050.010.0150.02Frequency(normalized to Fs)Amplitude (dB)0.450.460.470

DS671F2 5CS4385LIST OF TABLESTable 1. Single-Speed Mode Standard Frequencies ...

50 DS671F2CS4385 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.91120100806040200Frequency(normalized to Fs)Amplitude (dB)0.2 0.3 0.4 0.5 0.6 0.7 0.8120100806040200F

DS671F2 51CS4385 0.45 0.46 0.47 0.48 0.49 0.5 0.51 0.52 0.53 0.54 0.55109876543210Frequency(normalized to Fs)Amplitude (dB)0 0.05 0.1 0.15 0.2 0.250

52 DS671F2CS43858. PARAMETER DEFINITIONSTotal Harmonic Distortion + Noise (THD+N)The ratio of the rms value of the signal to the rms sum of all other

DS671F2 53CS43859. PACKAGE DIMENSIONS INCHES MILLIMETERSDIM MIN NOM MAX MIN NOM MAXA --- 0.055 0.063 --- 1.40 1.60A1 0.002 0.004 0.006 0.05 0.10 0.15B

54 DS671F2CS438510.ORDERING INFORMATION11.REFERENCES1. How to Achieve Optimum Performance from Delta-Sigma A/D & D/A Converters, by Steven Harris.

DS671F2 55CS4385Contacting Cirrus Logic SupportFor all product questions and inquiries, contact a Cirrus Logic Sales Representative. To find the one n

6 DS671F2CS43851. PIN DESCRIPTION Pin Name # Pin DescriptionVD 4Digital Power (Input) - Positive power supply for the digital section. Refer

DS671F2 7CS4385 AOUTA1 +,-AOUTB1 +,-AOUTA2 +,-AOUTB2 +,-AOUTA3 +,-AOUTB3 +,-AOUTA4 +,-AOUTB4 +,-39, 4038, 3735, 3634, 3329, 3028, 2725, 2624,

8 DS671F2CS43852. CHARACTERISTICS AND SPECIFICATIONSRECOMMENDED OPERATING CONDITIONSGND = 0 V; all voltages with respect to ground. ABSOLUTE MAXIMUM R

DS671F2 9CS4385DAC ANALOG CHARACTERISTICS - COMMERCIAL (-CQZ)Test Conditions (unless otherwise specified): VA = VLS = VLC = 5 V; VD = 2.5 V; TA = 25°C