CS4349 192-kHz DAC with Volume Control and 1 Vrms @ 3.3 V Features Advanced multibit delta–sigma architecture Supports all standard serial audio formats including time-division multiplexed (TDM) 101 dB dynamic range +3.3 V or +5.0 V analog supply -91 dB THD+N at 5.0 V +1.5 V to +5.0 V logic supplies for serial port -84 dB THD+N at 3.3 V +3.3 V to +5.
CS4349 Description The CS4349 is a complete stereo digital-to-analog system including digital interpolation, 5th-order multi-bit deltasigma digital-to-analog conversion, digital de-emphasis, volume control, channel mixing, and analog filtering. The advantages of this architecture include ideal linearity, no distortion mechanisms due to resistor matching errors, no linearity drift over time and temperature, tolerance to clock jitter, and a minimal set of external components.
CS4349 TABLE OF CONTENTS 1 PIN DESCRIPTION................................................................................................................................... 6 2 CHARACTERISTICS AND SPECIFICATIONS........................................................................................ 8 2.1 Recommended Operating Conditions ............................................................................................. 8 2.2 Absolute Maximum Ratings ...............................................
CS4349 8.2.3 Functional Mode (FM[1:0]) Bits 1-0...................................................................................... 30 8.3 Volume Mixing and Inversion Control - Register 03h .................................................................... 30 8.3.1 Channel A Volume = Channel B Volume (VOLB=A) Bit 7 ................................................... 30 8.3.2 Invert Signal Polarity (INVERT_A) Bit 6 ............................................................................... 30 8.3.
CS4349 LIST OF FIGURES Figure 1. Output Test Load ........................................................................................................................ 11 Figure 2. Maximum Loading....................................................................................................................... 11 Figure 3. THD+N vs Output Amplitude for VA = 5.0 V ............................................................................... 11 Figure 4. THD+N vs Output Amplitude for VA = 3.3 V .....
CS4349 1 PIN DESCRIPTION DIF2(AD1/CDOUT) 1 24 RST DEM(AD0/CS) 2 23 TSTO DIF0(SDA/CDIN) 3 22 AOUTB DIF1(SCL/CCLK) 4 21 BMUTEC VLC 5 20 VQ VD_FILT 6 19 GND GND 7 18 VA POPGUARD(TSTO) 8 17 VBIAS 16 AMUTEC SCLK 9 10 15 AOUTA SDIN 11 14 TSTO LRCK 12 13 TSTO VLS Table 1.
CS4349 Table 1. Pin Description Pin Name # Pin Description Control Port Definitions AD1/CDOUT 1 Address Bit 1 / Serial Control Data Out (I/O) - Chip address bit 1 in I²C Mode or data output in SPI Mode AD0/CS 2 Address Bit 0 / Chip Select (Input) - Chip address bit 0 in I²C Mode or Chip Select in SPI Mode SDA/CDIN 3 Serial Control Data In (I/O) - Input/Output for I²C data.
CS4349 2 CHARACTERISTICS AND SPECIFICATIONS 2.1 Recommended Operating Conditions GND = 0 V; all voltages with respect to ground. Table 2. Recommended Operating Conditions Parameters Symbol Min Typ Max Units VA VA 4.75 3.14 5.0 3.3 5.25 3.46 V V Serial Audio Interface power VLS 1.35 3.3 5.25 V Control Interface power Ambient Operating Temperature (Power Applied) Commercial (-CZZ) Automotive (-DZZ) VLC 3.14 3.3 5.25 V TA TA -40 -40 - +85 +105 °C °C DC Power Supply 2.
CS4349 2.3 DAC Analog Characteristics - Commercial (-CZZ) Test conditions (unless otherwise specified): VLS = VLC = 3.3 V; TA = 25° C; input test signal is a 997 Hz sine wave; Valid with the recommended capacitor values on VFILT, VQ, and VBIAS and output circuit as shown in the typical connection diagram in Figure 10 and Figure 17; Fs = 48 kHz, 96 kHz, and 192 kHz; measurement bandwidth 10 Hz to 20 kHz. Table 4.
CS4349 2.4 DAC Analog Characteristics - Automotive (-DZZ) Test conditions (unless otherwise specified): VLS = 1.35 V to 5.25 V, VLC = 3.14 V to 5.25 V, TA = -40° C to 85° C, input test signal is a 997 Hz sine wave; Valid with the recommended capacitor values on VFILT, VQ, and VBIAS and output circuit as shown in the typical connection diagram in Figure 10 and Figure 17; Fs = 48 kHz, 96 kHz, and 192 kHz; measurement bandwidth 10 Hz to 20 kHz. Table 5.
CS4349 CS4349 AOUTx + 3.3 µF + Analog Output RL CL GND Capacitive Load -- C L (pF) 125 100 75 Safe Operating Region 50 25 2.5 3 Figure 1. Output Test Load 5 10 15 20 Resistive Load -- RL (k ) Figure 2. Maximum Loading Figures 3 through 5 show typical THD+N performance for CS4349 devices that exhibit the maximum full scale output voltages as specified in the DAC Analog Characteristics tables (see page 9 and 10).
CS4349 2.5 Combined Interpolation and On-Chip Analog Filter Response The filter characteristics have been normalized to the sample rate (Fs) and can be referenced to the desired sample rate by multiplying the given characteristic by Fs. Amplitude vs. Frequency plots of this data are available in the “Filter Plots” on page 36. Table 6. Combined Interpolation and On-Chip Analog Filter Response Parameter Min Typ Max Unit 0 - .454 Fs Fast Roll-Off Passband (Note 5) -0.01 dB corner (Single Speed) -0.
CS4349 2.6 Switching Specifications - Serial Audio Interface Inputs: Logic 0 = GND; Logic 1 = VLS; CL = 20 pF. Table 7. Switching Specifications - Serial Audio Interface Parameters Symbol Min Max Units 3.14 V VA 5.25 V and 1.35 V VLS 5.
CS4349 . tlrckh LRCK (input) tlckd tlcks LRCK tsckl tsckh (Input) tfsh tfss tsckh tsckl SCLK SCLK (input) (Input) tds tdh SDIN tds MSB (input) SDIN MSB-1 2.7 MSB (Input) Figure 6. Serial Port Timing, Non-TDM Mode tdh MSB-1 Figure 7. Serial Port Timing, TDM Mode Switching Characteristics - Control Port - I²C Format Inputs: Logic 0 = GND; Logic 1 = VLC; CL = 20 pF. Table 8.
CS4349 2.8 Switching Characteristics - Control Port - SPI Format Inputs: Logic 0 = GND; Logic 1 = VLC; CL = 20 pF. Table 9. Switching Characteristics - Control Port - SPI Format Parameter Symbol Min Max Unit CCLK Clock Frequency fsclk - 6 MHz RST Rising Edge to CS Falling tsrs 500 - ns CCLK Edge to CS Falling (Note 10) tspi 500 - ns CS High Time Between Transmissions tcsh 1.
CS4349 2.9 Digital Characteristics Table 10. Digital Characteristics Parameters High-Level Input Voltage Symbol Min Typ Max Units VLC or VLS = 3.3 V VIH VIH 0.7•VL 2.0 - - V V VLS = 2.5 V VIH 1.7 - - V VLS = 1.5 V VLC or VLS = 5.0 V VIH 0.75•VL - - V VLC or VLS = 3.3 V VIL VIL - - 0.35•VL 0.8 V V VLS = 2.5 V VIL - - 0.7 V VLS = 1.5 V VIL - - 0.25•VL V Iin - 8 2 VA 0 ±10 - A pF mA V V VLC or VLS = 5.
CS4349 3 TYPICAL CONNECTION DIAGRAM +3.3 V + 0.1 µF VLS = PopGuard Enable GND = PopGuard Disable 10 µF 18 10 µF VA 47 k + VBIAS+ 17 8 POPGUARD(TSTO) VD_FILT Digital Audio Source 6 12 LRCK 0.1 µF + 10 µF 10 SCLK 11 SDIN +1.5 V to +3.3 V 9 VLS AMUTEC 16 0.1 µF AOUTA+ 15 CS4349 5 VLC +3.3 V Single-ended Output Filter AOUTA Single-ended Output Filter AOUTB BMUTEC 21 0.1 µF AOUTB+ 22 24 RST µ C/ Mode Configuration 4 DIF1(SCL/CCLK) VQ 20 + 3.
CS4349 4 APPLICATIONS 4.1 Sample Rate Range and Oversampling Mode Detect The device operates in one of three oversampling modes based on the input sample rate. In Control Port Mode, the allowed sample rate range in each mode depends on how the FM[1:0] bits are configured. In Stand-Alone Mode, the sample-rate range is as shown Table 12. 4.1.1 Sample Rate Auto-Detect The Auto-Detect feature is enabled by default.
CS4349 4.3 Digital Interface Format The device will accept audio samples in 1 of 8 digital interface formats, as shown in Table 13 on page 24 for Stand-Alone Mode and Table 14 on page 29 for Control Port Mode. The desired serial audio interface format is selected via the DIF[2:0] bits in Control Port Mode (see Section 8.2.1), or the DIF[2:0] pins in Stand-Alone Mode (see Section 5.1). For illustrations of the required relationship between LRCK, SCLK and SDIN, see Figures 11-13.
CS4349 4.3.1 Time-Division Multiplex (TDM) Mode Four TDM interface modes are available that allow the CS4349 to input stereo PCM data in one of four time “slots”. Figure 14 shows the serial port connections necessary to input eight-channel TDM data into four CS4349 devices and the corresponding DIF[2:0] pin or register-bit settings required for each CS4349. Figure 15 shows the TDM data format for each of the four CS4349 devices shown in Figure 14.
CS4349 4.4 De-Emphasis The device includes on-chip digital de-emphasis. Figure 16 shows the de-emphasis curve for Fs equal to 44.1 kHz. The frequency response of the de-emphasis curve scales proportionally with changes in sample rate, Fs. Gain dB T1=50 µs 0dB T2 = 15 µs -10dB F1 3.183 kHz F2 Frequency 10.61 kHz Figure 16. De-Emphasis Curve Note: 4.5 De-emphasis is only available in Single-Speed Mode.
CS4349 4.6.2 Control Port Mode 1. Hold RST low until the power supply is stable and the left/right clock is fixed to the appropriate frequency, as discussed in Section 4.2. In this state, the control port is reset to its default settings, VQ will remain low, and VBIAS will be connected to VA. 2. Bring RST high. The device will remain in a low-power state with VQ low. 3.
CS4349 4.8 Analog Output and Filtering The CS4349 requires a simple single-ended passive output design as shown in Figure 17. CS4349 3.3 µF AOUTx + + 560 10 k Analog Output 2200 pF GND * See section 4.9 for ground connection details Figure 17. Passive Single-Ended Output Filter 4.9 Grounding and Power Supply Arrangements As with any high-resolution converter, the CS4349 requires careful attention to power supply and grounding arrangements if its potential performance is to be realized.
CS4349 5 STAND-ALONE OPERATION 5.1 Serial Port Format Selection The desired serial audio format is selected with the DIF2, DIF1 and DIF0 pins. For an explanation of the required relationship between the LRCK, SCLK and SDIN, see Figures 11-13. For all formats, SDIN is valid on the rising edge of SCLK. TDM Mode requires the selection of which stereo pair time “slot” is used to output data as shown in Table 13 and Figure 15.
CS4349 6 CONTROL PORT OPERATION The control port is used to load all the internal register settings (see ”Register Description” on page 29). The operation of the control port may be completely asynchronous with the audio sample rate. However, to avoid potential interference problems, the control port pins should remain static if no operation is required. The control port can operate in I²C or SPI mode. 6.
CS4349 MAP or the default address (see Section 6.4.2) if an I²C read is the first operation performed on the device. 3. Once the device has transmitted the contents of the register pointed to by the MAP, issue an ACK. 4. If the INCR bit is set to 1, the device will continue to transmit the contents of successive registers. Continue providing a clock and issue an ACK after each byte until all the desired registers are read; then initiate a STOP condition to the bus. 5.
CS4349 6.3.2 SPI Read To read from the device, follow the procedure below while adhering to the values specified in ”Switching Characteristics - Control Port - SPI Format” on page 15. 1. Bring CS low. 2. The address byte on the CDIN pin must then be 10011111 (R/W = 1). 3. CDOUT pin will then output the data from the register pointed to by the MAP, which is set during the SPI write operation. 4. If the INCR bit (see Section 6.
CS4349 7 REGISTER QUICK REFERENCE Addr Function 6 5 4 Device and RevID DeviceID4 DeviceID3 DeviceID2 DeviceID1 2h Mode Control 3h Volume, Mixing, and Inversion Control default default default 4h Mute Control default 5h Channel A Volume Control 6h Channel B Volume Control default default 7h Ramp and Filter Control default 8h Misc.
CS4349 8 REGISTER DESCRIPTION Note: All register access is R/W unless specified otherwise. 8.1 Device and Revision ID - Register 01h 7 Device4 1 6 Device3 1 5 Device2 1 4 Device1 1 3 Device0 - 2 Rev2 - 1 Rev1 - 0 Rev0 - 1 FM1 0 0 FM0 0 Function: This register is Read-Only. It is decoded as follows: 8.2 Rev Register 01h contents A 1111,0000 B 1111,0001 C2 1111,1111 Mode Control - Register 02h 7 Reserved 0 8.2.
CS4349 8.2.2 De-Emphasis Control (DEM[1:0]) Bits 3-2 Default = 0 00 - No De-emphasis 01 - 44.1 kHz De-emphasis 10 - 48 kHz De-emphasis 11 - 32 kHz De-emphasis Gain dB T1=50 µs 0dB T2 = 15 µs Function: -10dB Selects the appropriate digital filter to maintain the standard 15 s/50 s digital de-emphasis filter response at 32, 44.1 or 48 kHz sample rates. (See Figure 20) Note: Mode 8.2.3 F1 3.183 kHz F2 Frequency 10.61 kHz Figure 20.
CS4349 8.3.3 Invert Signal Polarity (INVERT_B) Bit 5 Function: When set to 1, this bit inverts the signal polarity of channel B. When set to 0 (default), this function is disabled. This function is only available for Left Justified, Right Justified 16, and Right Justified 24 data formats. 8.3.4 ATAPI Channel Mixing and Muting (ATAPI[3:0]) Bits 3-0 Default = 1001 - AOUTA = aL, AOUTB = bR (Stereo) Function: The CS4349 implements the channel mixing functions of the ATAPI CD-ROM specification.
CS4349 Table 15. ATAPI Decode (Continued) ATAPI_A1 ATAPI_A0 ATAPI_B1 ATAPI_B0 8.4 AOUTB 1 0 0 0 aL MUTE 1 0 0 1 aL bR 1 0 1 0 aL bL 1 0 1 1 aL b[(L+R)/2] 1 1 0 0 a[(L+R)/2] MUTE 1 1 0 1 a[(L+R)/2] bR 1 1 1 0 a[(L+R)/2] bL 1 1 1 1 a[(L+R)/2] b[(L+R)/2] Mute Control - Register 04h 7 AMUTE 1 8.4.
CS4349 8.5 Channel A & B Volume Control - Register 05h & 06h 7 VOL7 0 6 VOL6 0 5 VOL5 0 4 VOL4 0 3 VOL3 0 2 VOL2 0 1 VOL1 0 0 VOL0 0 Digital Volume Control (VOL[7:0]) Bits 7-0 Default = 00h (0 dB) Function: The Digital Volume Control registers allow independent control of the signal levels in 1/2 dB increments from 0 to -127.5 dB. Volume settings are decoded as shown in Table 16. The volume changes are implemented as dictated by the Soft and Zero Cross bits in the Power and Muting Control register.
CS4349 Soft Ramp and Zero Cross Soft Ramp and Zero Cross Enable dictate that signal level changes, either by attenuation changes or muting, will occur in 1/8 dB steps and be implemented on a signal zero crossing. The 1/8 dB level change will occur after a time-out period between 512 and 1024 sample periods (10.7 ms to 21.3 ms at 48 kHz sample rate) if the signal does not encounter a zero crossing. The zero cross function is independently monitored and implemented for each channel. 8.6.
CS4349 8.7 Miscellaneous Control - Register 08h 7 PDN 0 8.7.1 6 Reserved 0 5 FREEZE 0 4 POPG_EN 1 3 Reserved 1 2 Reserved 1 1 Reserved 0 0 Reserved 0 Power Down (PDN) Bit 7 Function: When set to 1, the entire device enters a low-power state, and the contents of the control registers is retained. The power-down bit defaults to ‘0’ on power-up. 8.7.
CS4349 9 FILTER PLOTS 0 20 20 40 40 Amplitude (dB) Amplitude (dB) 0 60 80 80 100 100 120 0.4 0.5 0.6 0.7 0.8 Frequency(normalized to Fs) 0.9 120 1 0.4 0.5 0.6 0.7 0.8 Frequency(normalized to Fs) 0.9 1 0.02 0.02 0.015 0.015 0.01 0.01 0.005 0.005 Amplitude (dB) Figure 23. Stopband Rejection (Slow), all Modes Amplitude (dB) Figure 22. Stopband Rejection (Fast), all Modes 0 0 0.005 0.005 0.01 0.01 0.015 0.015 0.02 0 0.05 0.1 0.15 0.2 0.25 0.
0.5 0.5 0.4 0.4 0.3 0.3 0.2 0.2 0.1 0.1 Amplitude (dB) Amplitude (dB) CS4349 0 −0.1 0 −0.1 −0.2 −0.2 −0.3 −0.3 −0.4 −0.4 −0.5 0 0.05 0.1 0.15 0.2 Frequency (normalized to Fs) 0.25 0.3 −0.5 Figure 28. Quad-Speed (Fast) Passband Detail 0 0.05 0.1 0.15 0.2 Frequency (normalized to Fs) 0.25 0.3 Figure 29.
CS4349 11 PACKAGE DIMENSIONS 24L TSSOP (4.4 mm BODY) PACKAGE DRAWING N D E11 A2 E A e b2 A1 SIDE VIEW END VIEW L SEATING PLANE 1 2 3 TOP VIEW INCHES DIM MIN MILLIMETERS NOM MAX MIN NOTE NOM MAX A -- -- 0.043 -- -- 1.10 A1 0.002 0.004 0.006 0.05 -- 0.15 A2 0.03346 0.0354 0.037 0.85 0.90 0.95 b 0.00748 0.0096 0.012 0.19 0.245 0.30 2,3 D 0.303 0.307 0.311 7.70 7.80 7.90 1 E 0.248 0.2519 0.256 6.30 6.40 6.50 E1 0.169 0.1732 0.177 4.30 4.
CS4349 13 ORDERING INFORMATION Product CS4349 CDB4349 Description 192 kHz Stereo DAC with 1 Vrms Single Ended Output Package Pb-Free Grade Temp Range Commercial -40° to +85°C 24-TSSOP Evaluation Board for CS4349 YES Automotive -40° to +105°C - - Container Order# Rail CS4349-CZZ Tape and Reel CS4349-CZZR Rail CS4349-DZZ Tape and Reel CS4349-DZZR - CDB4349 - 14 REVISION HISTORY Release Changes F1 • • • • • Updated “DAC Analog Characteristics - Commercial (-CZZ)” on page 9.
