CS42L56-CNZ 데이터 시트보기 (PDF) - Cirrus Logic

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CS42L56-CNZ

Ultralow Power, Stereo Codec with Class H Headphone Amp

Cirrus Logic 

CS42L56

TABLE OF CONTENTS

1. PIN DESCRIPTIONS .............................................................................................................................. 8

1.1 I/O Pin Characteristics .................................................................................................................... 10

2. TYPICAL CONNECTION DIAGRAMS ................................................................................................. 11

3. CHARACTERISTIC AND SPECIFICATION TABLES ......................................................................... 14

RECOMMENDED OPERATING CONDITIONS ................................................................................... 14

ABSOLUTE MAXIMUM RATINGS ....................................................................................................... 14

ANALOG INPUT CHARACTERISTICS ................................................................................................ 14

ADC DIGITAL FILTER CHARACTERISTICS ....................................................................................... 17

HP OUTPUT CHARACTERISTICS ...................................................................................................... 18

LINE OUTPUT CHARACTERISTICS ................................................................................................... 19

ANALOG PASSTHROUGH CHARACTERISTICS ............................................................................... 21

COMBINED DAC INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE ...............................21

SWITCHING SPECIFICATIONS - SERIAL PORT ............................................................................... 22

SWITCHING SPECIFICATIONS - I²C CONTROL PORT ..................................................................... 23

SWITCHING CHARACTERISTICS - SPI CONTROL PORT ................................................................ 24

ANALOG OUTPUT ATTENUATION CHARACTERISTICS .................................................................. 25

DC CHARACTERISTICS ...................................................................................................................... 26

DIGITAL INTERFACE SPECIFICATIONS & CHARACTERISTICS ..................................................... 27

POWER CONSUMPTION - ALL SUPPLIES = 1.8 V ............................................................................ 28

POWER CONSUMPTION - ALL SUPPLIES = 2.5 V ........................................................................... 29

4. APPLICATIONS ................................................................................................................................... 30

4.1 Overview ......................................................................................................................................... 30

4.1.1 Basic Architecture ................................................................................................................. 30

4.1.2 Line Inputs ............................................................................................................................. 30

4.1.3 Line and Headphone Outputs (Class H, Ground-Centered Amplifiers) ................................. 30

4.1.4 Fixed-function DSP Engine ................................................................................................... 30

4.1.5 Beep Generator ..................................................................................................................... 30

4.1.6 Power Management .............................................................................................................. 30

4.2 Analog Inputs .................................................................................................................................. 31

4.2.1 Pseudo-differential Inputs ...................................................................................................... 32

4.2.2 Large-scale Inputs ................................................................................................................. 32

4.2.3 Microphone Inputs ................................................................................................................. 34

4.2.3.1 External Passive Components ................................................................................... 34

4.2.4 Optional VCM Buffer ............................................................................................................. 34

4.2.5 Automatic Level Control (ALC) .............................................................................................. 34

4.2.5.1 Attack/Release Time Calculations: ............................................................................ 36

4.3 Analog In to Analog Out Passthrough ............................................................................................ 36

4.4 Analog Outputs .............................................................................................................................. 37

4.5 Class H Amplifier ............................................................................................................................ 38

4.5.1 Power Control Options .......................................................................................................... 39

4.5.1.1 Standard Class AB Mode (setting 01 and 10) ........................................................... 39

4.5.1.2 Adapt to Volume Mode (setting 00) ........................................................................... 39

4.5.1.3 Adapt to Output Mode (setting 11) ............................................................................. 42

4.5.2 Power Supply Transitions ...................................................................................................... 42

4.5.3 Efficiency ............................................................................................................................... 43

4.6 Beep Generator .............................................................................................................................. 44

4.7 Limiter ............................................................................................................................................. 45

4.8 Serial Port Clocking ........................................................................................................................ 46

4.9 Digital Interface Format .................................................................................................................. 49

4.10 Initialization ................................................................................................................................... 49

4.11 Recommended DAC to HP or Line Power Sequence .................................................................. 49

4.11.1 Power-Up Sequence ........................................................................................................... 49

DS851F2

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