CDB42428 Cirrus Logic Inc, CDB42428 Datasheet
CDB42428
Specifications of CDB42428
Related parts for CDB42428
CDB42428 Summary of contents
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... Analog Output Cirrus Logic, Inc. http://www.cirrus.com Description The CDB42428 demonstration board is an excellent means for evaluating the CS424xx family of highly inte- grated multi-channel CODECs. Evaluation requires an analog/digital signal source and analyzer, Windows® compatible computer, and power supplies. System timing can be provided by an on-board oscillator or a master clock recovered from the S/PDIF input to the CS8416 ...
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... Figure 8. CS424xx Analog Inputs.................................................................................................. 20 Figure 9. Analog Outputs A1 and B1............................................................................................. 21 Figure 10. Analog Outputs A2 and B2........................................................................................... 22 Figure 11. Analog Outputs A3 and B3........................................................................................... 23 Figure 12. Analog Outputs A4 and B4........................................................................................... 24 Figure 13. DB-25, Ext Ctrl Header, Reset ..................................................................................... 25 Figure 14. CPLD............................................................................................................................ 26 Figure 15. Power ........................................................................................................................... 27 Figure 16. CS8416 ........................................................................................................................ 28 Figure 17. Component Placement and Reference Designators .................................................... 29 2 ........................................................................................... 15 CDB42428 ...
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... Figure 18. Top Layer..................................................................................................................... 30 Figure 19. Bottom Layer................................................................................................................ 31 LIST OF TABLES Table 1. System Connections ......................................................................................................... 6 Table 2. Jumper Settings ................................................................................................................ 7 Table 3. CS424xx External Control Header Signals ....................................................................... 7 Table 4. CS424xx DSP Header Signals.......................................................................................... 9 CDB42428 3 ...
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... Each CS424xx analog output is routed through a differential to single-ended, unity-gain low pass filter, which is AC- coupled to an RCA phono jack (see Figures 9 through 12). The analog output filter on the CDB42428 has been de- signed to add flexibility when evaluating the CS424xx DAC outputs. The output filter was designed in a two stage format, with the first stage being an optional instrumentation amplifier, and the second stage a 2-pole butterworth low pass filter ...
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... R-C pair must be such that the voltage across the aluminum electrolytic DC-block capacitor must be a minimum at 20 Hz. This keeps the distortion due to the electrolytic's dielectric absorption properties to a minimum. For a design utilizing only LPF configuration 1, there is no post-LPF resistor-divider pad, and a much smaller value capacitor can be used Gain = 1 + ------------ R 2 IN+ OUT OUT- IN- CDB42428 5 ...
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... C/SPI signals, master mute and reset, and the CS424xx interrupt signal is avail- Input + 5VDC power Input -18 to -12 VDC negative supply for the op-amps Input +12 to +18 VDC positive supply for the op-amps Input Ground connection from power supply Input CS8416 digital audio interface input via coax Table 1. System Connections CDB42428 SIGNAL PRESENT ...
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... EXT_CONTROL_PRESENT- CDB CTRL CDB CTRL CDB CTRL or CS424xx CDB CTRL CDB42428 2 C control port signals FUNCTION SELECTED Voltage source is +3.3 V regulator Voltage source binding post Voltage source is +3.3 V regulator Voltage source binding post Stand-Alone Modes are for debug use and are presently unsupported ...
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... Table 3. CS424xx External Control Header Signals (Continued) 8 Source Schematic Signal Name CDB GND CTRL EXT_MUTE CDB GND CTRL EXT_RESET CDB GND EXT_HDR_INT CS424xx CDB GND CTRL EXT_EN_SCL CDB GND CTRL EXT_EN_SDA CDB GND CDB42428 Buffer Buffer Voltage - - 74VHC125 VLC - - Diode - - - 74VHC125 VLC - - 74VHC125 VLS - - 74VHC125 VLS - - ...
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... CDB - CDB DSP_ADC_LRCK CS424xx or DSP CDB DSP_ADC_SCLK CS424xx or DSP CDB - CDB DSP_ADC_SDOUT CS424xx CDB - CDB - CDB CDB CDB CDB CDB Table 4. CS424xx CDB42428 Schematic Buffer Signal Name DSP_MCLK 74VHC125 GND - 74VHC125 GND - 74VHC125 GND - DSP_SDAT1 74VHC125 GND - DSP_SDAT2 74VHC125 GND - DSP_SDAT3 ...
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... Double-click on CDB425xx.EXE or its shortcut. Note that the software will configure itself to operate with a CDB424xx depending upon which is connected to the parallel port. 3) Select the LPT port you are using to connect to the CDB42428. 4) Shut down the application, reset the board, and then restart the application. ...
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... Main Window The main window of the CDB42428 control application allows the user to configure the CDB42428 inter-board rout- ing of clocks and data, as well as setup the CS5361, CS8416 and CS8406 parts. To make changes to the CS5361, CS8406, CS8416, or inter-board routing, the “Configure Board” radio button must be selected. ...
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... Windows® compatible computer with parallel port cable and CDB425xx software Step 1 - Follow Initial Board Setup procedure as described above Step 2 - Select Output Filter Jumpers Set all CDB42428 analog output filter jumpers to the FILT2 settings. Step 3 - Connect to Windows® Software Connect the computer to the board and launch the CDB425xx software. ...
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... Windows® compatible computer with parallel port cable and CDB425xx software Step 1 - Follow Initial Board Setup procedure as described above Step 2 - Select Output Filter Jumpers Set all CDB42428 analog output filter jumpers to the FILT2 settings. Step 3 - Connect to Windows® Software Connect the computer to the board and launch the CDB425xx software. ...
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... MUTING SCHEME 14 Figure 2. Output Channel Mute Select CDB42428 ...
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... SCHEMATICS AND LAYOUT CDB42428 15 ...
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... Figure 6. CS5361 External ADC #1 CDB42428 ...
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... Figure 7. CS5361 External ADC #2 CDB42428 19 ...
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... Figure 8. CS424xx Analog Inputs CDB42428 ...
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... I2C is a registered trademark of Philips Sem iconductor. Purchase of I2C Components of Cirrus Logic, Inc., or one of its sublicensed Associated Companies conveys a license under the Philips I2C Patent Rights to use those components in a standard I2C syste m. Microsoft W indows is a registered trademark of Microsoft Corporation. 32 CDB42428 ...