Datasheet

Low-Power, Stereo Audio Codec
with FlexSound Technology
ADC Input Mixers ...........................................................................72
Record Path Signal Processing
.................................................................73
Microphone AGC
.........................................................................73
Noise Gate
..............................................................................73
ADC Record Level Control
....................................................................76
Sidetone
..................................................................................77
Digital Audio Interfaces
.......................................................................78
Clock Control
...............................................................................85
Sample Rate Converter
.......................................................................88
Passband Filtering
...........................................................................89
Playback Path Signal Processing
...............................................................92
Automatic Level Control
....................................................................92
Parametric Equalizer
......................................................................93
Playback Level Control
.......................................................................95
DAC Input Mixers
...........................................................................96
Receiver Amplifier
...........................................................................97
Receiver Output Mixer
.....................................................................98
Receiver Output Volume
...................................................................99
Speaker Amplifiers
.........................................................................100
Speaker Output Mixers
...................................................................101
Speaker Amplifier Signal Processing
...........................................................102
Excursion Limiter
........................................................................102
Speaker Output Volume
...................................................................102
Power Limiter
...........................................................................105
Distortion Limiter
........................................................................106
Headphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
DirectDrive Headphone Amplifier
...........................................................107
Charge Pump
...........................................................................107
Class H Operation
.......................................................................108
Headphone Ground Sense (HPSNS)
.........................................................108
Headphone Output Mixers
.................................................................110
Headphone Output Volume
................................................................111
Output Bypass Switches
.....................................................................112
Click-and-Pop Reduction
....................................................................113
TABLE OF CONTENTS (continued)
Maxim Integrated
3
MAX98089