WM8716 Wolfson Microelectronics Ltd., WM8716 Datasheet
WM8716
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WM8716 Summary of contents
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... TV. The WM8716 supports data input word lengths from 16 to 24-bits and sampling rates up to 192kHz. The WM8716 consists of a serial interface port, digital interpolation filter, multi-bit sigma delta modulator and stereo DAC in a small 28-pin SSOP package ...
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... Analogue supply range Ground AGND, DGND Difference DGND to AGND Analogue supply current AVDD = 5V Digital supply current DVDD = 5V Analogue supply current AVDD = 3.3V Digital supply current DVDD = 3.3V WOLFSON MICROELECTRONICS LTD ORDERING INFORMATION DEVICE ML/I2S 28 MC/DM1 WM8716EDS 27 MD/DM0 26 MUTEB 25 24 MODE CSBIWO 23 RSTB 22 ZERO 21 AVDDL 20 AGNDL 19 ...
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... 2mA 2mA 2.6V min. IH MIN TYP MAX 105 112 -92 -97 105 112 0.4535fs 0.491fs 0.0012 -82 30/fs 0.274fs 0.459fs 0.001 -82 9/fs 195 -0.043 0.8 2.0 AVSS + 0.3V AVDD - 0.3V PD Rev 3.1 April 2001 WM8716 UNIT kHz ...
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... WM8716 TEST CONDITIONS AVDD, DVDD = 5V, AGND, DGND = 0V, T PARAMETER SYMBOL Analogue Output Levels Output level Minimum resistance load Maximum capacitance load Output DC level Gain mismatch channel to channel Reference Levels Potential divider resistance Voltage at VMIDL/VMIDR POR POR threshold LRCIN BCKIN DIN Figure 1 Audio Data Input Timing ...
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... MHH t MLH t MLS t CSML t MLCS MIN TYP MAX MLL MHH t t MLH MLS LSB t t CSML MLCS MIN TYP MAX 100 1SYSCLK 40 + 1SYSCLK Rev 3.1 April 2001 WM8716 UNIT ns ns UNIT ...
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... WM8716 PIN DESCRIPTION PIN NAME TYPE 1 LRCIN Digital input 2 DIN Digital input 3 BCKIN Digital input 4 CLKO Digital output 5 XTI Analogue input 6 XTO Analogue output 7 DGND Supply 8 DVDD Supply 9 AVDDR Supply 10 AGNDR Supply 11 VMIDR Analogue output 12 MODE8X Digital input 13 VOUTR Analogue output ...
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... This mode allows the use of alternative digital filters, such as the Pacific Microsonics PMD100 HDCD filter. In addition to the normal stereo operating mode the WM8716 may also be used in dual differential mode with either the left or right channel (selectable) being output differentially. Two WM8716s can then be used in parallel to implement a stereo channel, each supporting a single channel differentially ...
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... WM8716 AUDIO DATA INTERFACE Data may be input at a rate corresponding to the system clock having a rate of 256fs or 384fs or 512fs or 768fs, in which case an oversampling ratio of 128x is selected. Alternatively a rate of 128fs or 192fs may be used, in which case the first filter stage is bypassed and an oversampling ratio of 64x results ...
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... B23 B22 B21 (PIN 24) DATA DIN B23 B22 (PIN 2) B23 B22 (PIN 24) 1/8fs B20 B19 B23 B20 B19 B23 1/8fs B21 B20 B19 B21 B20 B19 WM8716 B22 B21 B20 B22 B21 B20 PD Rev 3.1 April 2001 9 ...
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... SOFTWARE CONTROL INTERFACE The WM8716 can be controlled using a 3-wire serial interface. MD/DM0 (pin 26) is used for the program data, MC/DM1 (pin 22) is used to clock in the program data and ML/I2S (pin 28) is use to latch in the program data. The 3-wire interface protocol is shown in Figure 6. CSB/IWO (pin 23) must be low when writing ...
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... Figure 6 Three-Wire Serial Interface REGISTER MAP WM8716 controls the special functions using 4 program registers, which are 16-bits long. These registers are all loaded through input pin MD/DM0. After the 16 data bits are clocked in, ML/I2S is used to latch in the data to the appropriate register. Table 5 shows the complete mapping of the 4 registers ...
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... WM8716 DAC OUTPUT ATTENUATION The level of attenuation for eight bit code X, is given by: 0 255) dB (mute), Bit 8 in register 0 (LDL) is used to control the loading of attenuation data in B[7:0]. When LDL is set to 0, attenuation data will be loaded into AL[7:0], but it will not affect the filter attenuation. LDR in register 1 has the same function for right channel attenuation. Only when LDL or LDR is set to ’ ...
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... Slow H REV L Normal H Inverted CKO L XTI H XTI/2 AUDIO INTERFACE 16-bit standard right justified 20-bit standard right justified 24-bit standard right justified 24-bit left justified (MSB first) 2 16-bit 24-bit 20-bit I S 20-bit left justified (MSB first) PD Rev 3.1 April 2001 WM8716 13 ...
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... Table 19. DIFF[1:0] B[4:5]) Table 19 Differential Output Modes Using these controls a pair of WM8716 devices may be used to build a ‘dual differential’ stereo implementation with higher performance and differential output. CLOCK LOSS DETECTOR DISABLE CDD (REG4, B6) Table 20 Clock Loss Detector Disable When the system clock is inactive for approximately 100 s, the clock loss detector circuit detects the loss of clock and the analogue circuitry is forced into a mute condition and the digital filters reset ...
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... Asserted when gain = 0 Asserted after 1024 zero input samples if IZD = 1 As MUTEB pin Asserted Asserted Asserted Asserted Asserted Asserted Asserted Asserted Asserted Asserted Signal Processing gain ramps between previous and new gain setting OPE FREQ_INVALID INIT PD Rev 3.1 April 2001 WM8716 ANMUTE 15 ...
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... WM8716 FILTER RESPONSES Figure 8 Digital Filter Response (Sharp Roll-off Mode) Figure 10 Digital Filter Response (Slow Roll-off Mode) 0 -20 -40 -60 -80 -100 -120 0 0.2 0.4 0.6 0.8 1 Frequency (Fs) Figure 12 Digital Filter Response 128fs Mode (192kHz Sample Rate) Normal Mode – Solid, Slow Mode – Dashed WOLFSON MICROELECTRONICS LTD ...
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... Production Data 1 0.8 0.6 0.4 0.2 0 -0.2 -0 Time (input samples) Figure 13 Impulse Response (Normal Roll-off, no De-emphasis) WOLFSON MICROELECTRONICS LTD 1 0.8 0.6 0.4 0.2 0 -0.2 -0 Figure 14 Impulse Response (Slow Roll-off, no De-emphasis) WM8716 Time (input samples) PD Rev 3.1 April 2001 60 17 ...
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... DVDD C 1 DGND Software I/F or Hardware Control Audio Serial Data I/F System Clock Input or Oscillator Input/Output NOTES: 1. AGND and DGND should be connected as close to the WM8716 as possible and C should be positioned as close to the WM8716 as possible Capacitor type used can have a big effect on device performance ...
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... AUDIO SERIAL BCKIN DATA SCKI Hardware Control NOTE: 1. MODE selects left/right data. High for right, Low for left. Figure 16 Example of 2 WM8716 Stereo DACs Configured in Hardware Differential Mode to Provide an Optimum Performance Stereo Output WOLFSON MICROELECTRONICS LTD RIGHT DAC DVDD 8 DVDD AVDD + ...
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... WM8716 SCKI Serial Interface Data LRCIN BCKIN DIN NOTES: 1. ML/I2S selects left or right justified inputs. 2. MD/DM0 selects LRCLK polarity. 3. CSBIWO selects 20 or 24-bit data. Figure 17 Example of WM8716 in MODE8X Operation WOLFSON MICROELECTRONICS LTD +VDD PMD-100 XTI WCKO LRCI BCKO BCKI DOL DIN ...
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... 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. WOLFSON MICROELECTRONICS LTD -C- 0.10 C SEATING PLANE (mm) NOM MAX ----- 2.0 ----- ----- 1.75 1.85 ----- 0.38 ----- 0.25 10.20 10.50 7.80 8.20 5.30 5.60 0.75 0. WM8716 DM007.C GAUGE PLANE 0. Rev 3.1 April 2001 21 ...