ACS422x68
LOW-POWER, HIGH-FIDELITY, CLASS-D AMPLIFIER
LIST OF FIGURES
Figure 1. ACS32201 Block Diagram ................................................................................................................2
Figure 2. Output Audio Processing ..................................................................................................................4
Figure 3. Prescaler & EQ Filters ......................................................................................................................6
Figure 4. 6-Tap IIR Equalizer Filter ..................................................................................................................7
Figure 5. DAC Coefficient RAM Write Sequence .............................................................................................9
Figure 6. DAC Coefficient RAM Read Sequence ...........................................................................................10
Figure 7. Gain Compressor, Output vs Input .................................................................................................13
Figure 8. Compressor block diagram .............................................................................................................15
Figure 9. 3-D Channel Inversion ....................................................................................................................20
Figure 10. Bass Enhancement .......................................................................................................................21
Figure 11. Treble Enhancement ....................................................................................................................23
Figure 12. Constant Output Power Error ........................................................................................................27
Figure 13. Constant Output Power nominal and high/low ..............................................................................28
Figure 14. Temp sense volume adjustment algorithm ...................................................................................34
Figure 15. Master mode .................................................................................................................................37
Figure 16. Slave mode ...................................................................................................................................37
Figure 17. Left Justified Audio Interface (assuming n-bit word length) ..........................................................38
Figure 18. Right Justified Audio Interface (assuming n-bit word length) ........................................................38
Figure 19. I2S Justified Audio Interface (assuming n-bit word length) ...........................................................39
Figure 20. Bit Clock mode ..............................................................................................................................41
Figure 21. 2-Wire Serial Control Interface ......................................................................................................41
Figure 22. Multiple Write Cycle ......................................................................................................................42
Figure 23. Read Cycle ...................................................................................................................................42
Figure 24. Multiple Read Cycle ......................................................................................................................43
Figure 25. ACS32201 TAG Pinout .................................................................................................................51
Figure 26. ACS32201 NAG Pinout ................................................................................................................52
Figure 27. Package Outline ...........................................................................................................................57
Figure 28. NAG/HLA Package Outline ...........................................................................................................58
IDT CONFIDENTIAL
1
V0.8 04/11
©2011 INTEGRATED DEVICE TECHNOLOGY, INC.
ACS422X68
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