CS4244 datasheet(3/63 Pages) CIRRUS

3 / 63 page

DS900F2

CS4244

LIST OF FIGURES

Figure 1.CS4244 Pinout .............................................................................................................................. 5

Figure 2.Typical Connection Diagram ......................................................................................................... 7

Figure 3.Test Circuit for ADC Performance Testing .................................................................................. 13

Figure 4.PSRR Test Configuration ............................................................................................................ 13

Figure 5.Equivalent Output Test Load ...................................................................................................... 16

Figure 6.TDM Serial Audio Interface Timing ............................................................................................. 20

Figure 7.PCM Serial Audio Interface Timing ............................................................................................. 20

Figure 8.I²C Control Port Timing ............................................................................................................... 21

Figure 9.System Level Initialization and Power-Up/Down Sequence ....................................................... 23

Figure 10.DAC DC Loading ...................................................................................................................... 24

Figure 11.Timing, I²C Write ....................................................................................................................... 25

Figure 12.Timing, I²C Read ....................................................................................................................... 25

Figure 13.Master Mode Clocking .............................................................................................................. 27

Figure 14.TDM System Clock Format ....................................................................................................... 28

Figure 15.32-bit Receiver Channel Block .................................................................................................. 28

Figure 16.Serial Data Coding and Extraction Options within the TDM Streams ....................................... 29

Figure 17.Left Justified Format ................................................................................................................. 30

Figure 18.I²S Format ................................................................................................................................. 30

Figure 19.Audio Path Routing ................................................................................................................... 31

Figure 20.Conventional SDOUT (Left) vs. Sidechain SDOUT (Right) Configuration ................................ 32

Figure 21.DAC1-4 Serial Data Source Selection ...................................................................................... 33

Figure 22.Example Serial Data Source Selection ..................................................................................... 34

Figure 23.ADC Path .................................................................................................................................. 35

Figure 24.Single-Ended to Differential Active Input Filter ......................................................................... 36

Figure 25.Single-Ended to Differential Active Input Filter - DC Coupled Input Signal (VA/2 Centered) .... 36

Figure 26.DAC1-4 Path ............................................................................................................................. 37

Figure 27.De-emphasis Curve .................................................................................................................. 38

Figure 28.Passive Analog Output Filter .................................................................................................... 38

Figure 29.Volume Implementation for the DAC1-4 Path ........................................................................... 39

Figure 30.Soft Ramp Behavior .................................................................................................................. 40

Figure 31.Interrupt Behavior and Example Interrupt Service Routine ....................................................... 44

Figure 32.ADC Stopband Rejection .......................................................................................................... 59

Figure 33.ADC Transition Band ................................................................................................................ 59

Figure 34.ADC Transition Band (Detail) .................................................................................................... 59

Figure 35.ADC Passband Ripple .............................................................................................................. 59

Figure 36.ADC HPF (48 kHz) .................................................................................................................... 59

Figure 37.ADC HPF (96 kHz) .................................................................................................................... 59

Figure 38.SSM DAC Stopband Rejection ................................................................................................. 60

Figure 39.SSM DAC Transition Band ....................................................................................................... 60

Figure 40.SSM DAC Transition Band (Detail) ........................................................................................... 60

Figure 41.SSM DAC Passband Ripple ..................................................................................................... 60

Figure 42.DSM DAC Stopband Rejection ................................................................................................. 61

Figure 43.DSM DAC Transition Band ....................................................................................................... 61

Figure 44.DSM DAC Transition Band (Detail) ........................................................................................... 61

Figure 45.DSM DAC Passband Ripple ..................................................................................................... 61

Figure 46.Package Drawing ...................................................................................................................... 62

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