CS42448_07 Datasheet, PDF (2/64 Pages) Cirrus Logic – 108 dB, 192 kHz 6-In, 8-Out CODEC

CS42448
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 ADC3 Analog Input ................................................................................................................ 25
4.2.3 High-Pass Filter and DC Offset Calibration ........................................................................... 26
4.3 Analog Outputs ............................................................................................................................... 26
4.3.1 Initialization ............................................................................................................................ 26
4.3.2 Output Transient Control ....................................................................................................... 28
4.3.3 Popguard ............................................................................................................................... 28
4.3.3.1 Power-Up ................................................................................................................... 28
4.3.3.2 Power-Down .............................................................................................................. 28
4.3.4 Mute Control .......................................................................................................................... 28
4.3.5 Line-Level Outputs and Filtering ........................................................................................... 29
4.3.6 Digital Volume Control ........................................................................................................... 29
4.3.7 De-Emphasis Filter ................................................................................................................ 29
4.4 System Clocking ............................................................................................................................. 30
4.5 CODEC Digital Interface Formats .................................................................................................. 31
4.5.1 I²S .......................................................................................................................................... 32
4.5.2 Left-Justified .......................................................................................................................... 32
4.5.3 Right-Justified ........................................................................................................................ 32
4.5.4 OLM #1 .................................................................................................................................. 32
4.5.5 OLM #2 .................................................................................................................................. 33
4.5.6 TDM ....................................................................................................................................... 33
4.5.7 I/O Channel Allocation ........................................................................................................... 34
4.6 AUX Port Digital Interface Formats ................................................................................................ 34
4.6.1 I²S .......................................................................................................................................... 34
4.6.2 Left-Justified .......................................................................................................................... 35
4.7 Control Port Description and Timing ............................................................................................... 35
4.7.1 SPI Mode ............................................................................................................................... 35
4.7.2 I²C Mode ................................................................................................................................ 36
4.8 Interrupts ........................................................................................................................................ 37
4.9 Recommended Power-Up Sequence ............................................................................................. 38
4.10 Reset and Power-Up .................................................................................................................... 38
2
DS648F3