CS42888 Datasheet, PDF (2/61 Pages) Cirrus Logic – 108 dB, 192 kHz 4-In, 8-Out CODEC

CS42888
TABLE OF CONTENTS
1. PIN DESCRIPTIONS .............................................................................................................................. 6
1.1 Digital I/O Pin Characteristics ........................................................................................................... 8
2. TYPICAL CONNECTION DIAGRAM ................................................................................................... 9
3. CHARACTERISTICS AND SPECIFICATIONS..................................................................................... 10
RECOMMENDED OPERATING CONDITIONS ................................................................................... 10
ABSOLUTE MAXIMUM RATINGS ....................................................................................................... 10
ANALOG INPUT CHARACTERISTICS (COMMERCIAL) .................................................................... 11
ANALOG INPUT CHARACTERISTICS (AUTOMOTIVE) ..................................................................... 12
ADC DIGITAL FILTER CHARACTERISTICS ....................................................................................... 13
ANALOG OUTPUT CHARACTERISTICS (COMMERCIAL) ................................................................ 14
ANALOG OUTPUT CHARACTERISTICS (AUTOMOTIVE) ................................................................. 15
COMBINED DAC INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE .............................. 17
SWITCHING SPECIFICATIONS - ADC/DAC PORT ............................................................................ 18
SWITCHING CHARACTERISTICS - AUX PORT ................................................................................. 20
SWITCHING SPECIFICATIONS - CONTROL PORT - I²C MODE ....................................................... 21
SWITCHING SPECIFICATIONS - CONTROL PORT - SPI FORMAT ................................................. 22
DC ELECTRICAL CHARACTERISTICS .............................................................................................. 23
DIGITAL INTERFACE SPECIFICATIONS & CHARACTERISTICS ..................................................... 23
4. APPLICATIONS .................................................................................................................................... 24
4.1 Overview ......................................................................................................................................... 24
4.2 Analog Inputs .................................................................................................................................. 24
4.2.1 Line-Level Inputs ................................................................................................................... 24
4.2.2 High-Pass Filter and DC Offset Calibration ........................................................................... 25
4.3 Analog Outputs ............................................................................................................................... 25
4.3.1 Initialization ............................................................................................................................ 25
4.3.2 Output Transient Control ....................................................................................................... 27
4.3.3 Popguard ............................................................................................................................... 27
4.3.3.1 Power-Up ................................................................................................................... 27
4.3.3.2 Power-Down .............................................................................................................. 27
4.3.4 Mute Control .......................................................................................................................... 27
4.3.5 Line-Level Outputs and Filtering ............................................................................................ 28
4.3.6 Digital Volume Control ........................................................................................................... 28
4.3.7 De-Emphasis Filter ................................................................................................................ 28
4.4 System Clocking ............................................................................................................................. 29
4.5 CODEC Digital Interface Formats ................................................................................................... 30
4.5.1 I²S .......................................................................................................................................... 31
4.5.2 Left-Justified .......................................................................................................................... 31
4.5.3 Right-Justified ........................................................................................................................ 31
4.5.4 OLM #1 .................................................................................................................................. 31
4.5.5 OLM #2 .................................................................................................................................. 32
4.5.6 TDM ....................................................................................................................................... 32
4.5.7 I/O Channel Allocation ........................................................................................................... 33
4.6 AUX Port Digital Interface Formats ................................................................................................. 33
4.6.1 I²S .......................................................................................................................................... 33
4.6.2 Left-Justified .......................................................................................................................... 33
4.7 Control Port Description and Timing ............................................................................................... 33
4.7.1 SPI Mode ............................................................................................................................... 34
4.7.2 I²C Mode ................................................................................................................................ 34
4.8 Interrupts ......................................................................................................................................... 36
4.9 Recommended Power-Up Sequence ............................................................................................. 36
4.10 Reset and Power-Up .................................................................................................................... 36
4.11 Power Supply, Grounding, and PCB Layout ................................................................................. 36
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DS717F1