Datasheet

Maxim Integrated │ 5
MAX98090 Ultra-Low Power Stereo Audio Codec
www.maximintegrated.com
Figure 1. I
2
S Audio Interface Timing Diagrams (TDM = 0) ............................................. 28
Figure 2. TDM Audio Interface Short Mode Timing Diagram (TDM = 1, BCI = 1) ........................... 28
Figure 3. I
2
C Interface Timing Diagram............................................................ 29
Figure 4. Digital Microphone Timing Diagram ....................................................... 30
Figure 5. Analog Audio Input Functional Diagram.................................................... 81
Figure 6. Analog Microphone Input Functional Diagram ............................................... 82
Figure 7. Digital Microphone Input Functional Diagram................................................ 84
Figure 8. Digital Microphone Compensation Filter Frequency Response.................................. 86
Figure 9. Analog Line Input Functional Diagram ..................................................... 89
Figure 10. Analog Line Input External Gain Configurations ............................................ 90
Figure 11. Analog Direct to ADC Mixer Input Functional Diagram ....................................... 92
Figure 12. Record Path Block Diagram ............................................................ 93
Figure 13. Record Path ADC Section ............................................................. 94
Figure 14. Record Path FlexSound Technology DSP Block ............................................ 96
Figure 15. Simplified Digital Audio Interface Block Diagram........................................... 100
Figure 16. DAI Clock Control and Configuration Section ............................................. 101
Figure 17. DAI Digital Data Path Configuration ..................................................... 107
Figure 18. Digital Audio Interface (DAI) Data Path Configurations ...................................... 108
Figure 19. DAI Timing for I
2
S Data Format .........................................................111
Figure 20. DAI Timing for Left Justified Data Formats ................................................111
Figure 21. DAI Timing for Right Justified Data Formats ...............................................112
Figure 22. DAI Timing for TDM Data Format........................................................114
Figure 23. Playback Path Block Diagram ..........................................................115
Figure 24. Playback Path Sidetone and Level Control ................................................116
Figure 25. Playback Path DSP...................................................................117
Figure 26. Dynamic Range Compression and Expansion............................................. 120
Figure 27. DRC Enable and Make-Up Gain........................................................ 120
Figure 28. DRC Compression Ratio and Threshold ..................................................121
Figure 29. DRC Expansion Ratio and Threshold ....................................................121
Figure 30. DRC Attack and Release Time Waveforms ............................................... 122
Figure 31. Playback Path Digital-to-Analog Converter ............................................... 125
Figure 32. Analog Audio Output Functional Diagram ................................................ 126
Figure 33. Receiver Output Functional Diagram .................................................... 127
Figure 34. Stereo Single-Ended Line Output Functional Diagram ...................................... 128
Figure 35. Class D Speaker Output Functional Diagram ..............................................131
Figure 36. DirectDrive Headphone Output Functional Diagram ........................................ 134
Figure 37. Reduced Power DAC Playback to Headphone Output Configuration ........................... 136
Figure 38. Headphone Output Ground Sense Connections ........................................... 138
LIST OF FIGURES