wm8742 Wolfson Microelectronics plc, wm8742 Datasheet
wm8742
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wm8742 Summary of contents
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... A/V receivers and high specification CD, DVD and home theatre systems. The device supports PCM data input word lengths from 16 to 32-bits and sampling rates up to 192kHz. The WM8742 also supports DSD bit- stream data format, in both direct DSD and PCM-converted DSD modes. ...
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... WM8742 BLOCK DIAGRAM w Production Data PD, Rev 4.2,August 2009 2 ...
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... MODE FILTER CHARACTERISTICS .................................................................... 51 DSD PLUS MODE FILTER CHARACTERISTICS ......................................................... 52 PCM MODE FILTER RESPONSES .............................................................................. 53 8FS MODE FILTER RESPONSES ................................................................................ 58 DSD PLUS MODE FILTER RESPONSES .................................................................... 58 DSD DIRECT MODE FILTER RESPONSES ................................................................ 59 DEEMPHASIS FILTER RESPONSES........................................................................... 61 APPLICATIONS INFORMATION ........................................................................ 62 PACKAGE DIMENSIONS .................................................................................... 63 IMPORTANT NOTICE ......................................................................................... 64 ADDRESS: .................................................................................................................... 64 w TABLE OF CONTENTS WM8742 PD, Rev 4.2, August 2009 3 ...
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... WM8742 PIN CONFIGURATION ORDERING INFORMATION TEMPERATURE DEVICE RANGE WM8742GEDS/V -40° to +85°C WM8742GEDS/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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... Left analogue positive reference reference Zero flag output Zero flag output Unused Unused Buffered audio interface Unused data output WM8742 DSD MODES DSD left audio data in Unused 64fs system clock input Unused Unused Differential mono mode selection 0 = normal operation 1 = differential mono ...
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... WM8742 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 / Notes: 1. Undefined inputs should be connected to DVDD or DGND 2. Tri-level pins which require the ‘Z’ state to be selected should be left floating (open) ...
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... Left analogue positive reference Zero flag output Controls internal oversampling rate low rate Z = medium rate 1 = high rate Controls audio interface wordlength – see Table 46 WM8742 DSD DIRECT MODE DSD left audio data in Unused 64fs system clock input Unused Unused Differential mono mode selection ...
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... WM8742 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 / Notes: 1. Undefined inputs should be connected to DVDD or DGND 2. Tri-level pins who require the ‘Z’ state to be selected should be left floating (open) ...
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... Notes: 1. Analogue and digital grounds must always be within 0.3V of each other. THERMAL PERFORMANCE PARAMETER Thermal resistance – junction to case Thermal resistance – junction to ambient w SYMBOL TEST CONDITIONS θ JC θ JA WM8742 MIN MAX -0.3V +4.5V -0.3V +7V DGND - 0.3V DVDD + 0.3V AGND - 0.3V AVDD + 0.3V 38.462MHz -40°C +85°C -65°C +150°C -55° ...
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... WM8742 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 Digital standby current I ELECTRICAL CHARACTERISTICS TEST CONDITIONS AVDD = 5V, DVDD = 3.3V, AGND, DGND = 0V, T stated. PARAMETER SYMBOL ...
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... MIN -3dB 20kHz Into 10kΩ load, 0dBFS input Into 10kΩ load, 0dB input DSD Into 10kΩ load, 0dB input DSD To midrail or AC coupled AVDD to VMIDL/VMIDR and VMIDL/VMIDR to AGND WM8742 TYP MAX UNIT 474 kHz -0.0077 RMS 0.948 V ...
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... WM8742 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 width low MCLK Master clock cycle time MCLK Duty cycle ...
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... DSDCLK64 rising edge Difference in edge timing DSD[0:1] to DSDCLK64 Table 3 DSD Audio Interface Timing Requirements w D[n] t 64CY 64L 44.1kHz, DSDCLK64 = 64fs unless otherwise stated. TEST CONDITIONS WM8742 t DH D[n+1] t 64H MIN TYP MAX UNIT 354.3 ns 140 ns 140 ...
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... WM8742 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 cycle time SCLK pulse width low SCLK pulse width high SDIN to SCLK set-up time ...
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... Table 5 Control Interface Timing – 2-wire Serial Control Mode Slave Mode 48kHz, MCLK = 256fs unless otherwise stated. SYMBOL t SCL t SCH t HOL t CSE t DSU t RIS t FAL t CSS t DHO t PS WM8742 MIN TYP MAX UNIT 0 5 MHz 600 ns 600 ns 100 ns 300 ns 300 ns 600 ns 900 ...
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... WM8742 INTERNAL POWER ON RESET CIRCUIT The WM8742 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. The digital POR circuit is powered from DVDD. This circuit monitors DVDD and asserts the internal digital reset if DVDD are below the minimum DVDD threshold which will allow the digital logic to function ...
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... Internal Analogue PORB indicates device ready, normal operation is not possible until the VMID pin has reached the midrail voltage +125 -25 C, DVDD A_max A_min TEST CONDITIONS Measured from DGND Measured from DGND WM8742 = 3.6V, DVDD = 3.0V max min MIN TYP MAX 1.86 1.83 PD, Rev 4.2, August 2009 UNIT ...
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... WM8742 DEVICE DESCRIPTION INTRODUCTION The WM8742 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 equipment. The WM8742 is a complete differential stereo audio digital-to-analogue converter. ...
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... D[8] is always set to zero 3-WIRE CONTROL INTERFACE DAISY CHAINING In daisy chaining mode, SDOUT (pin 25) outputs control data sampled on SDIN with a delay of 16 SCLK cycles. This data signal can be used to control another WM8742 in a daisy chain circuit as shown in Figure 10. Figure 10 Control Interface Daisy Chaining Setup To configure devices into daisy chain mode the CSB signal should be driven low while there is a register write to set register bit SDOUT=1 ...
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... All 1s will result in writing to a non-existent register, address 7Fh, preserving the current register settings. Figure 12 shows an example of how to access three WM8742 devices (the devices have all previously been configured in daisy chain mode): ...
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... WM8742 and the R/W bit is ‘0’, indicating a write, then the WM8742 responds by pulling SDIN low on the next clock pulse (ACK). recognised or the R/W bit is ‘1’, the WM8742 returns to the idle condition and wait for a new start condition and valid address. ...
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... Any mark-to-space ratio on LRCLK is acceptable provided the above requirements are met. The WM8742 will automatically detect when data with a LRCLK period of exactly 32 BCLKs is received, and select 16-bit mode. This overrides any previously programmed word length. The operating word length will revert to a programmed value only if a LRCLK period other than 32 BCLKs is detected ...
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... Figure 15 Right Justified Mode Timing Diagram MODE mode, the MSB is sampled on the second rising edge of BCLK following a LRCLK transition. LRCLK is low during the left data word and high during the right data word. Figure Mode Timing Diagram WM8742 PD, Rev 4.2, August 2009 23 ...
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... Figure 18 DSP Mode B Timing Diagram PCM MODE SAMPLING RATES The WM8742 supports master clock rates of 128fs to 768fs, where fs is the audio sampling frequency (LRCLK), typically 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz or 192kHz. The WM8742 has a master clock detection circuit that automatically determines the relationship between the master clock frequency and the sampling rate ...
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... The data can be input in two formats (left or right justified), selectable by register FMT[1:0], and two word lengths ( bit), selectable by register IWL[1:0]. In both modes the data is clocked into the WM8742 MSB first. For left justified data the word start is identified by the falling edge of LRCLK. The data is clocked in on the next 20/24 BCLK rising edges ...
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... When this output is connected to the DIN pin of the next device in the chain, each WM8742 device will simultaneously sample different channel data in the same LRCLK period. Daisy chaining is only available in DSP audio interface mode and is limited by a maximum BCLK frequency of 24 ...
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... Production Data DSD MODE The WM8742 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 WM8742 supports two channels of bitstream or DSD audio. Data bitstreams and the 64fs clock are supplied to pins 1, 22 and 3 respectively ...
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... WM8742 Figure 23 Bi-phase DSD Mode Timing Diagram SOFTWARE CONTROL MODE Software control allows access to all features of the WM8742. Selection of control mode is achieved by configuring the state of MODE/LRSEL (pin 24): PIN 24 Table 14 Control Mode Configuration DSD AND PCM MODE SWITCHING The audio interface mode can be switched between DSD and PCM by writing MODESEL[1:0] in R7. ...
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... Table 19 BCLK Polarity Control OVERSAMPLING RATE CONTROL The user has control of the oversampling ratio of the WM8742, and can set to the device to operate in low, medium or high rate modes. For correct operation of the digital filtering and other processing on the WM8742, the user must ensure the correct value of OSR[1:0] is set at all times. ...
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... Mode allows the use of custom digital filters by bypassing the WM8742 internal digital filters. When MODE8X is set, the PCM data input to the WM8742 is applied only to the digital volume control and then the analogue section of the DAC system, bypassing the digital filters. ...
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... Store RAT[9:5] and update attenuation on registers 0-3 ATTENUATION LEVEL 000(hex) 0dB 001(hex) -0.125dB : : : : : : -127.75dB 3FF(hex) -∞dB (mute) BIT LABEL R4 2 ATC 04h DESCRIPTION DEFAULT DESCRIPTION 0 Attenuator Control Mode Right channels use Right attenuation 1 = Right Channels use Left Attenuation PD, Rev 4.2, August 2009 WM8742 31 ...
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... Audio material is regularly recorded up to 0dB level and heavily compressed. This may cause clipping and occasional distortion when the digital media is applied to a DAC. In order to prevent this in the WM8742, an anti-clipping mode is provided, which attenuates the digital signal by 2dB processed through the digital filters. ...
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... 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 WM8742 output (upper trace) begins to decay exponentially from the DC level of the last input sample. The output decays towards V previous value ...
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... The WM8742 has one zero flag output pin, ZFLAG (pin 21). The zero flag feature is only valid for PCM data. The WM8742 asserts Logic 1 on the ZFLAG pin when a sequence of more than 1024 zeros is input to the chip. The default value is a logical AND of both left and right channels. Under software control, the user can also set the zero flag pin to respond to either the left channel OR the right channel ...
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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 WM8742 digital filters. There are three de-emphasis filters, one each for sampling rates of 32kHz, 44.1kHz and 48kHz. REGISTER ADDRESS Filter Control ...
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... REGISTER ADDRESS Mode Control 2 Table 36 Differential Output Modes Using these controls a pair of WM8742 devices may be used to build a dual differential stereo implementation with higher performance and differential output. DITHER Dither is applied whenever internal truncation occurs also used when a 32 bit input word is applied to the DAC prior to truncation to the internal wordlength ...
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... Production Data NORMAL PCM MODE DIGITAL FILTER SELECTION The WM8742 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 Digital Filter Selection Five digital filters are available for selection in each of the three OSR modes (low, medium and high rate) as selected by the OSR bit described in Table 20 ...
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... Setting the PWDN register bit immediately connects all outputs the DAC system including the DLL, the audio interface and the DSP. Input data samples are not preserved, but all control register settings are maintained. When PWDN is cleared the WM8742 will repeat its power-on initialisation sequence. ...
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... Production Data HARDWARE CONTROL MODE When the MODE pin is held ‘low’ the WM8742 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 MODE SWITCHING The audio interface mode can be switched between DSD Direct and PCM by controlling the state of pin DSD ...
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... Table 47 OSR/DSDR Hardware Control Pin Function MUTE PIN A soft mute can be applied to the WM8742 in the digital domain in all PCM. A logic low on the MUTEB pin will cause the attenuation to ramp to infinite attenuation at a rate of 1022x(4/fs). Setting MUTEB high will return the signal gain to its previous value. ...
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... Audio material is regularly recorded up to 0dB level and heavily compressed. This causes clipping and distortion when the digital media is applied to a DAC. In order to prevent this in the WM8742, an anti-clipping mode is provided, which attenuates the digital signal by 2dB processed through the digital filters ...
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... WM8742 DIGITAL FILTER SELECTION The WM8742 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 in section PCM Digital Filter Selection, from page 37. PIN 4 Table 50 FSEL/DINR Hardware Control Pin Function There is no choice of digital filters in DSD Direct mode – ...
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... Production Data OVERVIEW OF FUNCTIONS The WM8742 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 modes of operation: FUNCTION NORMAL PCM Selectable Digital Filters Deemphasis Support ...
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... WM8742 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 Control 06h 0 7 Mode Control 1 07h 0 8 Mode Control 2 08h 0 9 Software Reset ...
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... Store RAT[4:0] and update attenuation on registers 0-3 DEFAULT DESCRIPTION MSBs of attenuation data for right channel in 4dB step. See Table 25 00 (0dB) for details. 0 Attenuation data load control for right channel Store RAT[9:5] value but don’t update 1 = Store RAT[9:5] and update attenuation on registers 0-3 WM8742 PD, Rev 4.2, August 2009 45 ...
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... WM8742 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 [3:2] FMT[1:0] 4 LRP 5 BCP 6 REV 7 PWDN Table 58 R5 Format Control Register w DEFAULT DESCRIPTION ...
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... Selects low, medium or high sample rate mode for filter selection (equivalent to OSR pin functionality in Hardware Mode Low rate (32/44.1/48kHz Medium rate (96kHz High rate (192kHz Unused 8FS mode select Normal operation 1 = 8FS mode (digital filters bypassed) WM8742 PD, Rev 4.2, August 2009 47 ...
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... WM8742 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 Software Reset Control Register REGISTER BITS NAME ADDRESS R32 0 DSD_NO_ NOTCH Additional Control 1 ...
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... Attenuation at fs/2 Group Delay Table 64 Low Rate PCM Filter Characteristics w MIN TYP 0.546fs -111.8 -6.02 43 0.522fs -111.1 -28.07 8 0.546fs -110.3 -6.43 7 0.500fs -110.4 -116.19 47 0.500fs -111.8 -112.45 8 WM8742 MAX UNIT 0.454fs 0.000057 0.408fs 0.000036 0.454fs 0.000058 0.417fs 0.000066 ...
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... WM8742 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 Stopband Attenuation Fs/2 Attenuation at fs/2 Group Delay Medium Rate (88.2/96kHz) PCM Filter Response 3 ± ...
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... Table 67 8FS Mode Filter Characteristics w MIN TYP 0.500fs -120.0 -127.5 10 0.500fs -120.0 -124.93 4 0.500fs -110.1 -112.67 31 0.400fs -120.0 -120.58 6 0.400fs -122.8 -128.58 18 MIN TYP 121.13 5 WM8742 MAX UNIT 0.104fs 0.000010 0.104fs 0.000031 0.400fs 0.000873 0.104fs 0.000015 0.104fs ...
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... WM8742 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 Stopband Attenuation -3dB point ...
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... Frequency (fs) Figure 32 Low Rate PCM Filter 3 Frequency Response w 0.1 0.08 0.06 0.04 0.02 0 -0.02 -0.04 -0.06 -0.08 -0.1 2 Figure 29 Low Rate PCM Filter 1 Ripple 0.1 0.08 0.06 0.04 0.02 0 -0.02 -0.04 -0.06 -0.08 -0.1 0 2.5 3 3.5 4 Figure 31 Low Rate PCM Filter 2 Ripple 0.1 0.08 0.06 0.04 0.02 0 -0.02 -0.04 -0.06 -0.08 -0.1 0 2.5 3 3.5 4 Figure 33 Low Rate PCM Filter 3 Ripple WM8742 0.1 0.2 0.3 0.4 Frequency (fs) 0.1 0.2 0.3 0.4 Frequency (fs) 0.1 0.2 0.3 0.4 Frequency (fs) PD, Rev 4.2, August 2009 0.5 0.5 0.5 53 ...
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... WM8742 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 5 Frequency Response 0 -50 -100 -150 -200 0 0.5 1 Frequency (fs) Figure 38 Medium Rate PCM Filter 1 Frequency Response w 0.1 0.08 0.06 0.04 0.02 0 -0.02 -0 ...
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... Frequency (fs) Figure 44 Medium Rate PCM Filter 4 Frequency Response w 0.1 0.08 0.06 0.04 0.02 0 -0.02 -0.04 -0.06 -0.08 -0.1 0 0.05 1.5 2 Figure 41 Medium Rate PCM Filter 2 Ripple 0.1 0.08 0.06 0.04 0.02 0 -0.02 -0.04 -0.06 -0.08 -0.1 0 0.05 1.5 2 Figure 43 Medium Rate PCM Filter 3 Ripple 0.1 0.08 0.06 0.04 0.02 0 -0.02 -0.04 -0.06 -0.08 -0.1 0 0.05 1.5 2 Figure 45 Medium Rate PCM Filter 4 Ripple WM8742 0.1 0.15 0.2 0.25 Frequency (fs) 0.1 0.15 0.2 0.25 Frequency (fs) 0.1 0.15 0.2 0.25 Frequency (fs) PD, Rev 4.2, August 2009 55 ...
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... WM8742 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 -50 -100 -150 -200 0 0.2 0.4 Frequency (fs) Figure 50 High Rate PCM Filter 2 Frequency Response w 0.1 0.08 0.06 0.04 0.02 0 -0.02 -0.04 -0.06 -0.08 -0.1 0 1.5 2 Figure 47 Medium Rate PCM Filter 5 Ripple ...
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... Figure 56 High Rate PCM Filter 5 Frequency Response w 0.1 0.08 0.06 0.04 0.02 0 -0.02 -0.04 -0.06 -0.08 -0.1 0 0.6 0.8 1 Figure 53 High Rate PCM Filter 3 Ripple 0.1 0.08 0.06 0.04 0.02 0 -0.02 -0.04 -0.06 -0.08 -0.1 0 0.6 0.8 1 Figure 55 High Rate PCM Filter 4 Ripple 0.1 0.08 0.06 0.04 0.02 0 -0.02 -0.04 -0.06 -0.08 -0.1 0 0.6 0.8 1 Figure 57 High Rate PCM Filter 5 Ripple WM8742 0.025 0.05 0.075 0.1 0.125 Frequency (fs) 0.025 0.05 0.075 0.1 0.125 Frequency (fs) 0.025 0.05 0.075 0.1 0.125 Frequency (fs) PD, Rev 4.2, August 2009 0.15 0.15 0.15 57 ...
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... WM8742 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) Figure 60 DSD Plus Mode Filter 1 Frequency Response 0 -20 -40 -60 -80 -100 0 50 100 ...
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... Figure 67 DSD Plus Mode Filter 4 Ripple -10 -15 0 250 300 350 400 Figure 69 DSD Direct Mode Standard Low Gain Filter Ripple (Normalised) WM8742 Frequency (kHz Frequency (kHz Frequency (kHz) PD, Rev 4.2, August 2009 ...
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... WM8742 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 DSD Direct Mode 8fs Notch Low Gain Filter Frequency Response 0 -20 ...
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... Figure 80 De-emphasis Frequency Response (48kHz) w 0.4 0.3 0.2 0.1 0.0 -0.1 -0.2 -0.3 -0.4 15000 20000 0 Figure 77 De-emphasis Error (32kHz) 0.4 0.3 0.2 0.1 0.0 -0.1 -0.2 -0.3 -0.4 15000 20000 0 Figure 79 De-emphasis Error (44.1kHz) 0.4 0.3 0.2 0.1 0.0 -0.1 -0.2 -0.3 -0.4 15000 20000 0 Figure 81 De-emphasis Error (48kHz) WM8742 5000 10000 15000 20000 Frequency (Hz) 5000 10000 15000 20000 Frequency (Hz) 5000 10000 15000 20000 Frequency (Hz) PD, Rev 4.2, August 2009 61 ...
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... WM8742 APPLICATIONS INFORMATION Figure 82 External Components Figure 83 External Filter Components w Production Data PD, Rev 4.2,August 2009 62 ...
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... B. THIS DRAWING IS SUBJECT TO CHANGE WITHOUT NOTICE. C. BODY DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSION, NOT TO EXCEED 0.20MM. D. MEETS JEDEC.95 MO-150, VARIATION = AH. REFER TO THIS SPECIFICATION FOR FURTHER DETAILS -C- 0.10 C SEATING PLANE MAX ----- 2.0 ----- 0.25 1.85 0.30 0.38 ----- 0.25 10.50 8.20 5.60 0. WM8742 DM007.E Θ GAUGE PLANE 0. PD, Rev 4.2, August 2009 63 ...
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... WM8742 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 ...