CS4245_07 Datasheet, PDF (3/57 Pages) Cirrus Logic – 104 dB, 24-Bit, 192 kHz Stereo Audio CODEC

CS4245
TABLE OF CONTENTS
1. PIN DESCRIPTIONS ........................................................................................................................ 6
2. CHARACTERISTICS AND SPECIFICATIONS ...................................................................................... 8
SPECIFIED OPERATING CONDITIONS ............................................................................................. 8
ABSOLUTE MAXIMUM RATINGS ....................................................................................................... 8
DAC ANALOG CHARACTERISTICS ................................................................................................... 9
DAC COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE ............................ 10
ADC ANALOG CHARACTERISTICS ................................................................................................. 12
ADC ANALOG CHARACTERISTICS ................................................................................................. 14
ADC DIGITAL FILTER CHARACTERISTICS ..................................................................................... 15
AUXILIARY OUTPUT ANALOG CHARACTERISTICS ...................................................................... 16
AUXILIARY OUTPUT ANALOG CHARACTERISTICS ...................................................................... 17
AUXILIARY OUTPUT ANALOG CHARACTERISTICS ...................................................................... 18
DC ELECTRICAL CHARACTERISTICS ............................................................................................. 19
DIGITAL INTERFACE CHARACTERISTICS ...................................................................................... 20
SWITCHING CHARACTERISTICS - SERIAL AUDIO PORT 1 .......................................................... 21
SWITCHING CHARACTERISTICS - SERIAL AUDIO PORT 2 .......................................................... 23
SWITCHING CHARACTERISTICS - CONTROL PORT - I²C FORMAT ............................................ 26
SWITCHING CHARACTERISTICS - CONTROL PORT - SPI FORMAT ........................................... 27
3. TYPICAL CONNECTION DIAGRAM ................................................................................................... 28
4. APPLICATIONS ................................................................................................................................... 29
4.1 Recommended Power-Up Sequence ............................................................................................. 29
4.2 System Clocking ............................................................................................................................. 29
4.2.1 Synchronous / Asynchronous Mode ...................................................................................... 29
4.2.2 Master Clock ......................................................................................................................... 29
4.2.3 Master Mode ......................................................................................................................... 30
4.2.4 Slave Mode ........................................................................................................................... 30
4.3 High-Pass Filter and DC Offset Calibration .................................................................................... 31
4.4 Analog Input Multiplexer, PGA, and Mic Gain ................................................................................ 32
4.5 Input Connections ........................................................................................................................... 32
4.6 Output Connections ........................................................................................................................ 32
4.7 Output Transient Control ................................................................................................................ 33
4.7.1 Power-Up .............................................................................................................................. 33
4.7.2 Power-Down .......................................................................................................................... 33
4.7.3 Serial Interface Clock Changes ............................................................................................. 33
4.8 Auxiliary Analog Output .................................................................................................................. 33
4.9 De-Emphasis Filter ......................................................................................................................... 33
4.10 Internal Digital Loopback .............................................................................................................. 34
4.11 Mute Control ................................................................................................................................. 34
4.12 Control Port Description and Timing ............................................................................................. 35
4.12.1 SPI Mode ............................................................................................................................. 35
4.12.2 I²C Mode .............................................................................................................................. 36
4.13 Interrupts and Overflow ................................................................................................................ 37
4.14 Reset ............................................................................................................................................ 38
4.15 Synchronization of Multiple Devices ............................................................................................. 38
4.16 Grounding and Power Supply Decoupling .................................................................................... 38
5. REGISTER QUICK REFERENCE ........................................................................................................ 39
6. REGISTER DESCRIPTION .................................................................................................................. 40
6.1 Chip ID - Register 01h .................................................................................................................... 40
6.2 Power Control - Address 02h ......................................................................................................... 40
6.2.1 Freeze (Bit 7) ......................................................................................................................... 40
6.2.2 Power-Down MIC (Bit 3) ........................................................................................................ 40
6.2.3 Power-Down ADC (Bit 2) ....................................................................................................... 40
DS656F2
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