WM8741GEDS/V Wolfson Microelectronics, WM8741GEDS/V Datasheet
WM8741GEDS/V
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WM8741GEDS/V Summary of contents
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... CD, DVD, SACD audio • Home theatre systems • A/V receivers http://www.wolfsonmicro.com/enews WM8741 Includes linear/minimum phase and range of tailored characteristics Enables low pre-ringing, minimal latency and soft mute signals recorded up to 0dB Production Data, October 2009, Rev 4.2 Copyright ©2009 Wolfson Microelectronics plc ...
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WM8741 BLOCK DIAGRAM w Production Data PD, Rev 4.2, October 2009 2 ...
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Production Data DESCRIPTION ....................................................................................................... 1 FEATURES............................................................................................................. 1 APPLICATIONS ..................................................................................................... 1 BLOCK DIAGRAM ................................................................................................. 2 TABLE OF CONTENTS ......................................................................................... 3 PIN CONFIGURATION ........................................................................................... 4 ORDERING INFORMATION .................................................................................. 4 PIN DESCRIPTION (SOFTWARE CONTROL MODE) .......................................... 5 PIN DESCRIPTION (HARDWARE CONTROL MODE) .......................................... ...
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... WM8741 PIN CONFIGURATION ORDERING INFORMATION TEMPERATURE DEVICE RANGE WM8741GEDS/V -40° to +85°C WM8741GEDS/RV -40° to +85°C Note: Reel Quantity = 2,000 w MOISTURE SENSITIVITY PACKAGE 28-lead SSOP (Pb-free) 28-lead SSOP (Pb-free, tape and reel) Production Data PEAK SOLDERING LEVEL TEMPERATURE MSL2 260˚C MSL2 260˚ ...
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Production Data PIN DESCRIPTION (SOFTWARE CONTROL MODE) PIN NAME TYPE 1 LRCLK / Digital input DSDL 2 DIN / Digital input DINL 3 BCLK / Digital input DSD64CLK 4 FSEL / Digital input DINR Tri-level 5 MCLK Digital input 6 ...
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WM8741 PIN NAME TYPE 24 MODE / Digital input, LRSEL tri-level 25 MUTEB / Digital input or output: SDOUT Internal pull-up 26 SDIN / Digital input DEEMPH Tri-level 27 SCLK / Digital input DSD 28 CSB / Digital input SADDR ...
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Production Data PIN DESCRIPTION (HARDWARE CONTROL MODE) PIN NAME TYPE 1 LRCLK / Digital input DSDL 2 DIN / Digital input DINL 3 BCLK / Digital input DSD64CLK 4 FSEL / Digital input DINR Tri-level 5 MCLK Digital input 6 ...
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WM8741 PIN NAME TYPE 24 MODE / Digital input, LRSEL tri-level 25 MUTEB / Digital input or output: SDOUT Internal pull-up 26 SDIN / Digital input DEEMPH Tri-level 27 SCLK / Digital input DSD 28 CSB / Digital input SADDR ...
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... Proper ESD precautions must be taken during handling and storage of this device. Wolfson Microelectronics tests its package types according to IPC/JEDEC J-STD-020B for Moisture Sensitivity to determine acceptable storage conditions prior to surface mount assembly. These levels are: MSL1 = unlimited floor life at <30°C / 85% Relative Humidity. Not normally stored in moisture barrier bag. ...
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WM8741 RECOMMENDED OPERATING CONDITIONS PARAMETER Digital supply range Analogue supply range Ground AGND, DGND Difference DGND to AGND Analogue operating current Digital operating current Analogue standby current I AVDD (Standby) Digital standby current I DVDD (Standby) ELECTRICAL CHARACTERISTICS TEST CONDITIONS ...
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Production Data TEST CONDITIONS AVDD = 5V, DVDD = 3.3V, AGND, DGND = 0V, T stated. PARAMETER SYMBOL Internal Analogue Filter Bandwidth Passband edge response Analogue Output Levels PCM full scale differential output level DSD Direct differential output level DSD ...
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WM8741 MASTER CLOCK TIMING Figure 1 Master Clock Timing Requirements Test Conditions AVDD = 5V, DVDD = 3.3V, AGND = 0V, DGND = 0V, T PARAMETER Master Clock Timing Information MCLK Master clock pulse width high MCLK Master clock pulse ...
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Production Data DSD AUDIO INTERFACE TIMINGS Figure 3 DSD Audio Timing - Normal Mode Figure 4 DSD Audio Timing - Phase Modulated Mode Test Conditions o DVDD = 3.3V, GND = 0V +25 A PARAMETER SYMBOL Audio Data ...
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WM8741 CONTROL INTERFACE TIMING – 3-WIRE MODE Figure 5 Control Interface Timing - 3-Wire Serial Control Mode Test Conditions o DVDD = 3.3V, GND = 0V +25 A PARAMETER SCLK rising edge to LATCH rising edge SCLK pulse ...
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Production Data CONTROL INTERFACE TIMING – 2-WIRE MODE Figure 6 Control Interface Timing - 2-Wire Serial Control Mode Test Conditions DVDD = 3.3V, DGND = 0V +25 A PARAMETER SCLK Frequency SCLK Low Pulse-Width SCLK High Pulse-Width Hold ...
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WM8741 INTERNAL POWER ON RESET CIRCUIT The WM8741 includes two internal Power On Reset (POR) circuits which are used to reset the digital logic into a default state after power up and to allow the analogue circuits to power-up silently. ...
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Production Data Figure 8 DVDD Power up Sequence Test Conditions DVDD = 3.3V, DGND = 0V +25 A PARAMETER SYMBOL Power Supply Input Timing Information DVDD level to POR rising V por_hi edge (DVDD rising) DVDD level to ...
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WM8741 DEVICE DESCRIPTION INTRODUCTION The WM8741 is an ultra high performance DAC designed for digital audio applications. Its range of features makes it ideally suited for use in professional recording environments, CD/DVD players, AV receivers and other high-end consumer audio ...
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Production Data SOFTWARE CONTROL INTERFACE The software control interface may be operated using a 2-wire or 3-wire (SPI-compatible) serial interface. When operating under serial control, hardware configuration pins are ignored. Note: DIFFHW will override all other pins, forcing the device ...
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WM8741 Figure 11 Initial Setup of Two WM8741 Devices into Control Interface Daisy Chain Mode To write to a single device in the chain a complete sequence needs to be written to all the devices. Devices that do not require ...
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Production Data 2-WIRE SERIAL CONTROL MODE The WM8741 supports software control via a 2-wire serial bus. Many devices can be controlled by the same bus, and each device has a unique 7-bit address (this is not the same as the ...
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WM8741 PCM DIGITAL AUDIO INTERFACE Audio data is applied to the DAC system via the Digital Audio Interface. Five popular interface formats are supported: • • • • • All five formats require the MSB to be transmitted first, and ...
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Production Data RIGHT JUSTIFIED MODE In right justified mode, the LSB is sampled on the rising edge of BCLK preceding a LRCLK transition. LRCLK is high during the left data word and low during the right data word. Figure 15 ...
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WM8741 DSP MODE A In DSP mode A, the first bit is sampled on the BCLK rising edge following the one that detects a low to high transition on LRCLK. No BCLK edges are allowed between the data words. The ...
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Production Data SAMPLING RATE (LRCLK) 32kHz 44.1kHz 48kHz 88.2kHz 96kHz 176.4kHz 192kHz Table 11 Typical Relationships between Master Clock Frequency and Sampling Rate in Normal PCM Mode 8FS MODE Operation in 8FS mode requires that audio data for left and ...
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WM8741 In both modes the polarity of LRCLK can be switched using register bit LRP. 8FS MODE SAMPLING RATES Since the data rate in 8FS mode is much faster than in standard PCM mode, there are restrictions on the MCLK ...
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Production Data DSD MODE The WM8741 supports DSD input bitstreams at 64x the oversampling rate. The data is supplied at a rate of 64 bits per normal word clock. In DSD, no word clock is provided. The WM8741 supports two ...
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WM8741 Figure 23 Bi-phase DSD Mode Timing Diagram SOFTWARE CONTROL MODE Software control allows access to all features of the WM8741. Selection of control mode is achieved by configuring the state of MODE/LRSEL (pin 24): PIN 24 Table 14 Control ...
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Production Data LRCLK POLARITY In left justified, right justified or I bit is set high, the expected polarity of LRCLK will be the opposite of that shown in Figure 14, Figure 15 and Figure 16. If this feature is used ...
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WM8741 MCLK/LRCLK RATIO CONTROL (NORMAL PCM MODE) The ratio of MCLK/LRCLK can be programmed directly or auto-detected. REGISTER ADDRESS Mode Control 1 Table 21 MCLK/LRCLK Ratio Control (Normal PCM Mode) 8FS MODE 8FS Mode allows the use of custom digital ...
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Production Data REGISTER BITS LABEL ADDRESS R0 [4:0] LAT[4:0] DACLLSB Attenuation 5 UPDATE 00h R1 [4:0] LAT[9:5] DACLMSB Attenuation 5 UPDATE 01h R2 [4:0] RAT[4:0] DACRLSB Attenuation 5 UPDATE 02h R3 [4:0] RAT[9:5] DACRMSB Attenuation 5 UPDATE 03h Table 24 ...
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WM8741 VOLUME RAMP MODE There are two ways to change the volume in the WM8741, controlled by VOL_RAMP. VOL_RAMP=0, the volume changes in a single step from the current volume setting to the new volume when an update is applied ...
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Production Data MUTE MODES 0.000 Figure 24 Application and Release of Soft Mute Figure 24 shows the application and release of SOFTMUTE for a full amplitude sinusoid being played at 48kHz sampling rate. When SOFTMUTE (lower trace) is asserted, the ...
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WM8741 ZERO FLAG OUTPUT The WM8741 has one zero flag output pin, ZFLAG (pin 21). The zero flag feature is only valid for PCM data. The WM8741 asserts Logic 1 on the ZFLAG pin when a sequence of more than ...
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Production Data MUTEB Figure 25 Software Control Mode MUTEB and ZFLAG Configuration DE-EMPHASIS Setting the DEEMPH[1:0] register bits enables de-emphasis support in the WM8741 digital filters. There are three de-emphasis filters, one each for sampling rates of 32kHz, 44.1kHz and ...
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WM8741 DIFFERENTIAL MONO MODE DIFF[1:0] sets the required differential output mode; normal stereo, reversed stereo, mono left or mono right, as shown in Table 36. REGISTER ADDRESS Mode Control 2 Table 36 Differential Output Modes Using these controls a pair ...
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Production Data NORMAL PCM MODE DIGITAL FILTER SELECTION The WM8741 has a number of advanced digital filters that can be selected in all PCM operation modes (with the exception of 8FS mode). REGISTER ADDRESS Filter Control Table 38 PCM Advanced ...
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WM8741 It is recommended that the device is muted before the filter response is changed to prevent noise as the filters are reset from appearing on the outputs. Full details of these filters are described in Table 68 and Figure ...
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Production Data HARDWARE CONTROL MODE When the MODE pin is held ‘low’ the WM8741 is set to hardware control mode and a limited feature set can be configured. PIN 24 Table 44 MODE/LRSEL Hardware Control Pin Function DSD AND PCM ...
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WM8741 OVERSAMPLING RATE CONTROL The user has control of the oversampling ratio of the WM8741, and can set to the device to operate in low, medium or high rate modes. processing on the WM8741 in PCM hardware mode, the user ...
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Production Data ZERO FLAG In hardware control mode the ZFLAG pin asserts when 1024 consecutive zero samples are applied to the left and right channels of the WM8741 when in PCM mode. In DSD mode, the ZFLAG has no function. ...
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WM8741 DIGITAL FILTER SELECTION The WM8741 includes a wide range of digital filters. A limited set of these can be selected in hardware control mode as listed in Table 50. Full details of each digital filter response can be found ...
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Production Data OVERVIEW OF FUNCTIONS The WM8741 has many modes of operation, and certain restrictions on what functions are available in which modes. Table 52 gives an overview of the functions available in hardware and software control modes across all ...
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WM8741 REGISTER MAP Reg Name Addr Bit 8 DACLLSB 0 00h 0 Attenuation DACLMSB 1 01h 0 Attenuation DACRLSB 2 02h 0 Attenuation DACRMSB 3 03h 0 Attenuation 4 Volume Control 04h 0 5 Format Control 05h 0 6 Filter ...
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Production Data REGISTER BITS NAME ADDRESS R0 [4:0] LAT[4:0] DACLLSB 5 UPDATE Attenuation 00h Table 53 R0 DACL LSB Attenuation Control Register REGISTER BITS NAME ADDRESS R1 [4:0] LAT[9:5] DACLMSB 5 UPDATE Attenuation 01h Table 54 R1 DACL MSB Attenuation ...
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WM8741 REGISTER BITS NAME ADDRESS R4 0 VOL_RAMP Volume Control 04h 1 ATT2DB 2 ATC 3 SOFTMUTE 4 IZD 6:5 ZEROFLR [1:0] 7 AMUTE Table 57 R4 Volume Control Register REGISTER BITS NAME ADDRESS R5 [1:0] IWL[1:0] Format Control 05h ...
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Production Data REGISTER BITS NAME ADDRESS R6 [2:0] FIRSEL Filter Control 06h [4:3] DSDFILT [6:5] DEEMPH [1:0] 7 ZFLAG_HI Table 59 R6 Filter Control Register REGISTER BITS NAME ADDRESS R7 [1:0] MODESEL Mode Control 1 [1:0] 07h [4:2] SR[3:0] [6:5] ...
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WM8741 REGISTER BITS NAME ADDRESS R8 [1:0] DITHER[1:0] Mode Control 2 08h [3:2] DIFF[1:0] 4 DOUT 5 SDOUT 6 DSD_GAIN Table 61 R8 Mode Control Register 2 REGISTER BITS NAME ADDRESS R9 [7:0] RESET Software reset 09h Table 62 R9 ...
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Production Data DIGITAL FILTER CHARACTERISTICS PCM MODE FILTER CHARACTERISTICS PARAMETER TEST CONDITIONS Low Rate (32/44.1/48kHz) PCM Filter Response 1 ± 0.000057dB Passband Passband Ripple Stopband Stopband Attenuation Attenuation at fs/2 Group Delay Low Rate (32/44.1/48kHz) PCM Filter Response 2 ± ...
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WM8741 PARAMETER TEST CONDITIONS Medium Rate (88.2/96kHz) PCM Filter Response 1 ± 0.000021 dB Passband Passband Ripple Stopband Stopband Attenuation Fs/2 Attenuation at fs/2 Group Delay Medium Rate (88.2/96kHz) PCM Filter Response 2 ± 0.000014 dB Passband Passband Ripple Stopband ...
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Production Data PARAMETER TEST CONDITIONS High Rate (176.4/192kHz) PCM Filter Response 1 ± 0.000010 dB Passband Passband Ripple Stopband Stopband Attenuation Fs/2 Attenuation at fs/2 Group Delay High Rate (176.4/192kHz) PCM Filter Response 2 ± 0.000031 dB Passband Passband Ripple ...
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WM8741 DSD PLUS MODE FILTER CHARACTERISTICS PARAMETER TEST CONDITIONS DSD Plus Filter Response 1 ± 0.020423 dB Passband Passband Ripple Stopband Stopband Attenuation -3dB point Filter Cut-off Group Delay DSD Plus Filter Response 2 ± 0.011308dB Passband Passband Ripple Stopband ...
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Production Data PCM MODE FILTER RESPONSES 0 -50 -100 -150 -200 0 0.5 1 1.5 2 Frequency (fs) Figure 28 Low Rate PCM Filter 1 Frequency Response 0 -50 -100 -150 -200 0 0.5 1 1.5 2 Frequency (fs) Figure ...
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WM8741 0 -50 -100 -150 -200 0 0.5 1 1.5 2 Frequency (fs) Figure 34 Low Rate PCM Filter 4 Frequency Response 0 -50 -100 -150 -200 0 0.5 1 1.5 2 Frequency (fs) Figure 36 Low Rate PCM Filter ...
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Production Data 0 -50 -100 -150 -200 0 0.5 1 Frequency (fs) Figure 40 Medium Rate PCM Filter 2 Frequency Response 0 -50 -100 -150 -200 0 0.5 1 Frequency (fs) Figure 42 Medium Rate PCM Filter 3 Frequency Response ...
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WM8741 0 -50 -100 -150 -200 0 0.5 1 Frequency (fs) Figure 46 Medium Rate PCM Filter 5 Frequency Response 0 -50 -100 -150 -200 0 0.2 0.4 Frequency (fs) Figure 48 High Rate PCM Filter 1 Frequency Response 0 ...
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Production Data 0 -50 -100 -150 -200 0 0.2 0.4 Frequency (fs) Figure 52 High Rate PCM Filter 3 Frequency Response 0 -50 -100 -150 -200 0 0.2 0.4 Frequency (fs) Figure 54 High Rate PCM Filter 4 Frequency Response ...
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WM8741 8FS MODE FILTER RESPONSES 0 -50 -100 -150 -200 0 0.5 1 1.5 2 Frequency (fs) Figure 58 8FS Mode Filter Frequency Response DSD PLUS MODE FILTER RESPONSES 0 -20 -40 -60 -80 -100 0 50 100 Frequency (kHz) ...
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Production Data 0 -20 -40 -60 -80 -100 0 50 100 Frequency (kHz) Figure 64 DSD Plus Mode Filter 3 Frequency Response 0 -20 -40 -60 -80 -100 0 50 100 Frequency (kHz) Figure 66 DSD Plus Mode Filter 4 ...
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WM8741 0 -20 -40 -60 -80 -100 0 50 100 150 200 Frequency (kHz) Figure 70 DSD Direct Mode Standard High Gain Filter Frequency Response 0 -20 -40 -60 -80 -100 0 50 100 150 200 Frequency (kHz) Figure 72 ...
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Production Data DEEMPHASIS FILTER RESPONSES 0.0 -2.0 -4.0 -6.0 -8.0 -10.0 0 5000 10000 Frequency (Hz) Figure 76 De-emphasis Frequency Response (32kHz) 0.0 -2.0 -4.0 -6.0 -8.0 -10.0 0 5000 10000 Frequency (Hz) Figure 78 De-emphasis Frequency Response (44.1kHz) 0.0 ...
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WM8741 APPLICATIONS INFORMATION Figure 82 External Components Figure 83 External Filter Components w Production Data PD, Rev 4.2, October 2009 62 ...
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Production Data PACKAGE DIMENSIONS DS: 28 PIN SSOP (10.2 x 5.3 x 1.75 mm Dimensions Symbols (mm) MIN NOM A ----- A 0. 1.65 1. 0.22 c 0.09 D 9.90 ...
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... WM8741 IMPORTANT NOTICE Wolfson Microelectronics plc (“Wolfson”) products and services are sold subject to Wolfson’s terms and conditions of sale, delivery and payment supplied at the time of order acknowledgement. Wolfson warrants performance of its products to the specifications in effect at the date of shipment. Wolfson reserves the right to make changes to its products and specifications or to discontinue any product or service without notice ...