MAX98372 datasheet(4/91 Pages) MAXIM

4 / 91 page

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Maxim Integrated │ 4

MAX98372

Digital Input Class D Amplifier

with DHT and Brownout Protection

LIST OF TABLES

Table 1. MAX98372 Control Register Map ......................................................... 24

Table 2. Interrupt Sources ...................................................................... 29

Table 3. Interrupt Registers ..................................................................... 30

Table 4. Supported Sample Rates ................................................................ 42

Table 5. Supported BCLK Rates in Slave Mode ..................................................... 42

Table 6. Configuration for Digital Audio Interface Format .............................................. 43

Table 7. PCM Receive Channel Enables ........................................................... 44

Table 8. TDM Channel Selection for Mono Replay ................................................... 46

Table 9. Digital Highpass Filter .................................................................. 49

Table 10. Biquad Filter Coefficient Registers........................................................ 50

LIST OF FIGURES (CONTINUED)

Figure 9. Example of Dynamic Headroom Tracking in Mode 2 Operation with a High RP..................... 54

Figure 10. Example of Dynamic Headroom Tracking in Mode 2 Operation with a Low RP .................... 55

Figure 11. Example of Dynamic Headroom Tracking in Mode 3a Operation ............................... 56

Figure 12. Example of Dynamic Headroom Tracking in Mode 3b Operation ............................... 57

Figure 13. Example of Dynamic Headroom Tracking in Mode 3b with Limiter .............................. 58

Figure 14. Dynamic Headroom Tracking Attack Functionality........................................... 59

Figure 15. Thermal Foldback Performance ......................................................... 64

Figure 16. ALC Example 1: Battery Drops Below Brownout Threshold and Quickly Recovers ................. 65

Figure 17. ALC Example 2: Battery Drops Below Brownout Threshold and Stays Low ....................... 66

Figure 18. ALC Example 3: Battery Drops Below Brownout Threshold and Stays Long Enough for the Amp to Mute

(Non-Infinite Hold Time)........................................................................ 67

Figure 19. ALC Example 4: Battery Drops Below Brownout Threshold and Stays Long Enough for the Amp to Mute

(Infinite Hold Time)............................................................................ 68

Figure 20. ALC Example 5: Immediate Attenuation................................................... 69

Figure 21. DOUT Data Structure ................................................................. 73

Figure 22. Single Data Drive .................................................................... 75

Figure 23. Double Data Drive illustration........................................................... 75

Figure 24. Typical Application Circuit with Ferrites Beads Used......................................... 83

Figure 25. THD Performance Improvement Enabled by Remote Sensing ................................. 83

Figure 26. START, STOP, and REPEATED START Conditions ......................................... 85

Figure 27. Acknowledge........................................................................ 86

Figure 28. Writing One Byte of Data to the MAX98372 ............................................... 86

Figure 29. n-Bytes of Data to the MAX98372 ....................................................... 86

Figure 30. Reading One Byte of Data from the MAX98372 ............................................ 87

Figure 31. Reading n-Bytes of Data from the MAX98372 .............................................. 87

Figure 32. MAX98372+ WLP Ball Dimensions ...................................................... 89

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