CS42L52
6.40.4 Speaker Attenuation ............................................................................................................ 74
6.41 Charge Pump Frequency (Address 34h) ...................................................................................... 74
6.41.1 Charge Pump Frequency .................................................................................................... 74
7. ANALOG PERFORMANCE PLOTS .................................................................................................... 75
7.1 Headphone THD+N versus Output Power Plots ............................................................................ 75
8. EXAMPLE SYSTEM CLOCK FREQUENCIES .................................................................................... 77
8.1 Auto Detect Enabled .................................................................................................................... 77
8.2 Auto Detect Disabled .................................................................................................................... 77
9. PCB LAYOUT CONSIDERATIONS ..................................................................................................... 78
9.1 Power Supply, Grounding ............................................................................................................... 78
9.2 QFN Thermal Pad .......................................................................................................................... 78
10. ADC & DAC DIGITAL FILTERS ........................................................................................................ 79
11. PARAMETER DEFINITIONS .............................................................................................................. 80
12. PACKAGE DIMENSIONS .................................................................................................................. 81
THERMAL CHARACTERISTICS ........................................................................................................ 81
13. ORDERING INFORMATION .............................................................................................................. 82
14. REFERENCES .................................................................................................................................... 82
15. REVISION HISTORY .......................................................................................................................... 82
LIST OF FIGURES
Figure 1. Typical Connection Diagram ...................................................................................................... 10
Figure 2. Headphone Output Test Load .................................................................................................... 19
Figure 3. Serial Audio Interface Timing ..................................................................................................... 21
Figure 4. Control Port Timing - I²C ............................................................................................................ 22
Figure 5. Analog Input Signal Flow ........................................................................................................... 26
Figure 6. Single-Ended MIC Configuration ............................................................................................... 27
Figure 7. Differential MIC Configuration .................................................................................................... 27
Figure 8. ALC ............................................................................................................................................ 28
Figure 9. Noise Gate Attenuation .............................................................................................................. 28
Figure 10. DSP Engine Signal Flow .......................................................................................................... 29
Figure 11. PWM Output Stage .................................................................................................................. 30
Figure 12. Analog Output Stage ................................................................................................................ 30
Figure 13. Beep Configuration Options ..................................................................................................... 31
Figure 14. Peak Detect & Limiter .............................................................................................................. 32
Figure 15. Battery Compensation ............................................................................................................. 34
Figure 16. I²S Format ................................................................................................................................ 36
Figure 17. Left-Justified Format ................................................................................................................ 36
Figure 18. Right-Justified Format (DAC only) ........................................................................................... 36
Figure 19. DSP Mode Format) .................................................................................................................. 36
Figure 20. Control Port Timing, I²C Write .................................................................................................. 38
Figure 21. Control Port Timing, I²C Read .................................................................................................. 38
Figure 22. THD+N vs. Output Power per Channel at 1.8 V (16 Ω load) ................................................... 75
Figure 23. THD+N vs. Output Power per Channel at 2.5 V (16 Ω load) ................................................... 75
Figure 24. THD+N vs. Output Power per Channel at 1.8 V (32 Ω load) ................................................... 76
Figure 25. THD+N vs. Output Power per Channel at 2.5 V (32 Ω load) ................................................... 76
Figure 26. ADC Passband Ripple ............................................................................................................. 79
Figure 27. ADC Stopband Rejection ......................................................................................................... 79
Figure 28. ADC Transition Band ............................................................................................................... 79
Figure 29. ADC Transition Band Detail ..................................................................................................... 79
Figure 30. DAC Passband Ripple ............................................................................................................. 79
Figure 31. DAC Stopband ......................................................................................................................... 79
Figure 32. DAC Transition Band ............................................................................................................... 79
Figure 33. DAC Transition Band (Detail) ................................................................................................... 79
DS680A1
7
CIRRUS [ CIRRUS LOGIC ]
