ACS422A68TAGZBX8 IDT, ACS422A68TAGZBX8 Datasheet - Page 2

• Manufacturer Part Number: ACS422A68TAGZBX8
• Description: Interface - CODECs
• Manufacturer: IDT

Specifications of ACS422A68TAGZBX8

• Rohs: yes
• Part # Aliases: IDTACS422A68TAGZBX8

ACS422x68
LOW-POWER, HIGH-FIDELITY, INTEGRATED CODEC
©2011 INTEGRATED DEVICE TECHNOLOGY, INC.
TABLE OF CONTENTS
1. OVERVIEW ................................................................................................................................ 8
2. POWER MANAGEMENT ........................................................................................................ 11
3. OUTPUT AUDIO PROCESSING ............................................................................................. 13
4. INPUT AUDIO PROCESSING ................................................................................................. 48
1.1. Block Diagrams ..................................................................................................................................8
1.2. Audio Outputs ....................................................................................................................................9
1.3. Audio Inputs .....................................................................................................................................10
2.1. Control Registers .............................................................................................................................11
2.2. Stopping the Master Clock ...............................................................................................................12
3.1. DC Removal ....................................................................................................................................13
3.2. Volume Control ................................................................................................................................14
3.3. Digital DAC Volume Control .............................................................................................................15
3.4. Parametric Equalizer .......................................................................................................................15
3.5. Gain and Dynamic Range Control ...................................................................................................21
3.6. Limiter ..............................................................................................................................................22
3.7. Compressor .....................................................................................................................................22
3.8. Output Effects ..................................................................................................................................29
3.9. Stereo Depth (3-D) Enhancement ...................................................................................................29
3.10. Psychoacoustic Bass Enhancement ..............................................................................................30
3.11. Treble Enhancement .....................................................................................................................31
3.12. Mute and De-Emphasis .................................................................................................................32
3.13. Mono Operation and Phase Inversion ...........................................................................................32
3.14. Analog Outputs ..............................................................................................................................34
3.15. Other Output Capabilities ..............................................................................................................40
3.16. Thermal Shutdown .........................................................................................................................43
4.1. Analog Inputs ...................................................................................................................................48
4.2. Mono Mixing and Output Configuration ...........................................................................................49
4.3. Microphone Bias ..............................................................................................................................51
4.4. Programmable Gain Control ............................................................................................................51
4.5. ADC Digital Filter .............................................................................................................................52
3.4.1. Prescaler & Equalizer Filter ...............................................................................................16
3.4.2. EQ Registers ......................................................................................................................17
3.4.3. Equalizer, Bass, Treble Coefficient & Equalizer Prescaler RAM .......................................18
3.7.1. Configuration ......................................................................................................................23
3.7.2. Controlling parameters .......................................................................................................24
3.7.3. Overview ............................................................................................................................24
3.7.4. Limiter/Compressor Registers ............................................................................................26
3.7.5. Expander Registers ...........................................................................................................28
3.13.1. DAC Control Register .....................................................................................................32
3.13.2. Interpolation and Filtering ................................................................................................33
3.14.1. Headphone Output ...........................................................................................................34
3.14.2. Speaker Outputs ..............................................................................................................35
3.14.3. DDX
3.15.1. Audio Output Control .......................................................................................................41
3.15.2. Headphone Switch ...........................................................................................................41
3.15.3. Headphone Operation ......................................................................................................42
3.15.4. EQ Operation ...................................................................................................................42
3.16.1. Algorithm description: ......................................................................................................43
3.16.2. Thermal Trip Points. .........................................................................................................43
3.16.3. Temperature Limit State Diagram: ...................................................................................44
3.16.4. Instant Cut Mode ..............................................................................................................44
3.16.5. Short Circuit Protection ....................................................................................................45
3.16.6. Thermal Shutdown Registers ...........................................................................................45
4.1.1. Input Registers ...................................................................................................................49
4.2.1. ADC Registers ...................................................................................................................50
4.3.1. Microphone Bias Control Register .....................................................................................51
4.4.1. Input PGA Software Control Register. ...............................................................................52
TM
Class D Audio Processing ....................................................................................35
2
ACS422X68
V1.6 01/13