Cirrus-logic CS4385A Manual do Utilizador

Copyright  Cirrus Logic, Inc. 2014(All Rights Reserved)http://www.cirrus.com114-dB, 192-kHz 8-Channel D/A ConverterFeatures Advanced Multi-bit Delta

10 DS837F2CS4385ADAC ANALOG CHARACTERISTICS - AUTOMOTIVE (-DQZ) Test Conditions (unless otherwise specified): VA = 4.75 to 5.25 V; VLS = 1.71 to 5.25

DS837F2 11CS4385APOWER AND THERMAL CHARACTERISTICS Notes:4. Current consumption increases with increasing Fs within a given speed mode and is signal d

12 DS837F2CS4385ACOMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSEThe filter characteristics have been normalized to the sample rate (Fs) an

DS837F2 13CS4385ACOMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE (CONTINUED)DSD COMBINED DIGITAL & ON-CHIP ANALOG FILTER RESPONSEParam

14 DS837F2CS4385ADIGITAL CHARACTERISTICSNotes:13. Any pin except supplies. Transient currents of up to ±100 mA on the input pins will not cause SCR la

DS837F2 15CS4385ASWITCHING CHARACTERISTICS - PCMInputs: Logic 0 = GND, Logic 1 = VLS, CL = 20 pF. Notes:14. After powering up, RST should be held low

16 DS837F2CS4385ASWITCHING CHARACTERISTICS - DSDLogic 0 = GND; Logic 1 = VLS; CL=20pF. Parameter Symbol Min Typ Max UnitMCLK Duty Cycle 40 - 60 %

DS837F2 17CS4385ASWITCHING CHARACTERISTICS - CONTROL PORT - I²C FORMATInputs: Logic 0 = GND, Logic 1 = VLC, CL=20pF.Notes:18. Data must be held for su

18 DS837F2CS4385ASWITCHING CHARACTERISTICS - CONTROL PORT - SPI FORMAT Inputs: Logic 0 = GND, Logic 1 = VLC, CL=20pF.Notes:19. tspi is only needed bef

DS837F2 19CS4385A3. TYPICAL CONNECTION DIAGRAM VLSMCLKVDAOUTA1+8320.1 µF+1 µF+2.5 VSDIN191 µF0.1 µF++2021FILT+VQ76LRCKSCLKSDIN3SDIN239400.1 µF47 µFVA0

2 DS837F2CS4385ATABLE OF CONTENTS1. PIN DESCRIPTION ...

20 DS837F2CS4385A VLSCS4385MCLKVDAOUTA1+8320.1 µF+1 µF+2.5 VSDIN191 µF

DS837F2 21CS4385A4. APPLICATIONS The CS4385A serially accepts two’s complement formatted PCM data. Audio data is input via the serial data inputpins (

22 DS837F2CS4385A4.2 Mode SelectIn Hardware Mode, operation is determined by the Mode Select pins. The states of these pins are continu-ally scanned f

DS837F2 23CS4385A4.3 Digital Interface Formats The serial port operates as a slave and supports the I²S, Left-Justified, Right-Justified, One-Line Mod

24 DS837F2CS4385A4.3.1 OLM #1OLM #1 serial audio interface format operates in Single-, Double-, or Quad-Speed Mode and will slave toSCLK at 128 Fs. Si

DS837F2 25CS4385A4.3.4 OLM #4OLM #4 serial audio interface format operates in Single-, Double-, or Quad-Speed Mode and will slave toSCLK at 256 Fs. Ei

26 DS837F2CS4385A4.5 Interpolation FilterTo accommodate the increasingly complex requirements of digital audio systems, the CS4385A incorpo-rates sele

DS837F2 27CS4385A4.7 ATAPI SpecificationThe CS4385A implements the channel-mixing functions of the ATAPI CD-ROM specification. TheATAPI functions are

28 DS837F2CS4385A 4.9 Grounding and Power Supply ArrangementsAs with any high-resolution converter, the CS4385A requires careful attention to power su

DS837F2 29CS4385A4.10 Analog Output and FilteringCirrus Logic application note AN55, “Design Notes for a 2-Pole Filter with Differential Input,” discu

DS837F2 3CS4385A7.1.2 Chip Revision [Read Only] ...

30 DS837F2CS4385A4.11 The MUTEC OutputsThe MUTEC1 and MUTEC234 pins have an auto-polarity detect feature. The MUTEC output pins are highimpedance at t

DS837F2 31CS4385A4.12.2 Software Mode1. Hold RST low until the power supply is stable and the master and left/right clocks are locked to the appropria

32 DS837F2CS4385A5. CONTROL PORT INTERFACE The control port is used to load all the internal register settings in order to operate in Software Mode (s

DS837F2 33CS4385A2. After transmitting an acknowledge (ACK), the device will then transmit the contents of the register pointed to by the MAP. The MAP

34 DS837F2CS4385A5.4 Memory Address Pointer (MAP)5.4.1 INCR (Auto Map Increment Enable)Default = ‘0’0 - Disabled1 - Enabled5.4.2 MAP4-0 (Memory Addre

DS837F2 35CS4385A6. REGISTER QUICK REFERENCE Addr Function 7 6 5 4 3 2 1 001h Chip Revision CHIPID4 CHIPID3 CHIPID2 CHIPID1 CHIPID0 REV REV REVdefaul

36 DS837F2CS4385A14h 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

DS837F2 37CS4385A7. REGISTER DESCRIPTIONNote: All registers are read/write in I²C Mode and write only in SPI, unless otherwise noted.7.1 Chip I.D. and

38 DS837F2CS4385A7.2.3 PCM/DSD Selection (DSD/PCM)Default = 00 - PCM1 - DSDFunction:This function selects DSD or PCM Mode. The appropriate data and cl

DS837F2 39CS4385A 7.3.2 Functional Mode (FM)Default = 1100 - Single-Speed Mode (4 to 50 kHz sample rates)01 - Double-Speed Mode (50 to 100 kHz sample

4 DS837F2CS4385ALIST OF FIGURESFigure 1.TDM Serial Audio Interface Timing ...

40 DS837F2CS4385A7.4.2 Direct DSD Conversion (DIR_DSD)Function:When set to 0 (default), DSD input data is sent to the DSD processor for filtering and

DS837F2 41CS4385A7.5 Filter Control (Address 05h)7.5.1 Interpolation Filter Select (FILT_SEL) Function:When set to 0 (default), the Interpolation Filt

42 DS837F2CS4385A7.7.2 Channel A Volume = Channel B Volume (Px_A=B) Default = 00 - Disabled1 - EnabledFunction:The AOUTAx and AOUTBx volume levels are

DS837F2 43CS4385ASoft Ramp on Zero CrossingSoft Ramp and Zero Cross Enable dictates that signal-level changes, either by attenuation changes ormuting,

44 DS837F2CS4385A7.8.6 Mute Polarity and Detect (MUTEP1:0) Default = 0000 - Auto polarity detect, selected from MUTEC1 pin01 - Reserved 10 - Active lo

DS837F2 45CS4385A7.10 Mixing Control (Address 0Ah, 0Dh, 10h, 13h)7.10.1 De-Emphasis Control (PX_DEM1:0)Default = 0000 - Disabled01 - 44.1 kHz10 - 48 k

46 DS837F2CS4385A7.10.2 ATAPI Channel Mixing and Muting (ATAPI)Default = 01001 - AOUTAx=aL, AOUTBx=bR (Stereo)Function:The CS4385A implements the chan

DS837F2 47CS4385A7.11 Volume Control (Address 0Bh, 0Ch, 0Eh, 0Fh, 11h, 12h, 14h, 15h)These eight registers provide individual volume and mute control

48 DS837F2CS4385A8. FILTER PLOTS0.4 0.5 0.6 0.7 0.8 0.9 1−120−100−80−60−40−200Frequency(normalized to Fs)Amplitude (dB)0.4 0.42 0.44 0.46 0.48 0.5 0.5

DS837F2 49CS4385A 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5−0.02−0.015−0.01−0.00500.0050.010.0150.02Frequency(normalized to Fs)Amplitude (dB)0.

DS837F2 5CS4385ALIST OF TABLESTable 1. Single-Speed Mode (SSM) Standard Frequencies ...

50 DS837F2CS4385A 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1120100806040200Frequency(normalized to Fs)Amplitude (dB)0.2 0.3 0.4 0.5 0.6 0.7 0.812010080604020

DS837F2 51CS4385A 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 0.25

52 DS837F2CS4385A9. PARAMETER DEFINITIONSTotal Harmonic Distortion + Noise (THD+N)The ratio of the rms value of the signal to the rms sum of all other

DS837F2 53CS4385A10.PACKAGE DIMENSIONS 11.ORDERING INFORMATIONINCHES MILLIMETERSDIM MIN NOM MAX MIN NOM MAXA --- 0.055 0.063 --- 1.40 1.60A1 0.002 0.0

54 DS837F2CS4385A12.REFERENCES1. How to Achieve Optimum Performance from Delta-Sigma A/D & D/A Converters, by Steven Harris. Paperpresented at the

DS837F2 55CS4385A13.REVISION HISTORY Release ChangesF1AUG ‘08Changed to Final ReleaseF2APR ‘14Updated Section 6 and Section 7.6, “Invert Control (Addr

6 DS837F2CS4385A1. PIN DESCRIPTION Pin Name # Pin DescriptionVD 4Digital Power (Input) - Positive power supply for the digital section. Refer to the

DS837F2 7CS4385A AOUTA1 +,-AOUTB1 +,-AOUTA2 +,-AOUTB2 +,-AOUTA3 +,-AOUTB3 +,-AOUTA4 +,-AOUTB4 +,-39, 4038, 3735, 3634, 3329, 3028, 2725, 2624,

8 DS837F2CS4385A2. CHARACTERISTICS AND SPECIFICATIONSRECOMMENDED OPERATING CONDITIONSGND = 0 V; all voltages with respect to ground. ABSOLUTE MAXIMUM

DS837F2 9CS4385ADAC ANALOG CHARACTERISTICS - COMMERCIAL (-CQZ)Test Conditions (unless otherwise specified): VA = VLS = VLC = 5 V; VD = 2.5 V; TA = 25°