DA7212 datasheet(2/129 Pages) DIALOG

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DA7212

Ultra-low power stereo codec

Company confidential

Datasheet

Revision 3c

24-Nov-2015

2 of 129

Contents

General description ............................................................................................................................. 1

Key features ......................................................................................................................................... 1

Applications ......................................................................................................................................... 1

Contents ............................................................................................................................................... 2

Figures.................................................................................................................................................. 4

Tables ................................................................................................................................................... 5

Terms and definitions ................................................................................................................... 7

Block diagram................................................................................................................................ 8

Pinout ............................................................................................................................................. 9

Absolute maximum ratings ........................................................................................................ 11

Recommended operating conditions ........................................................................................ 11

Electrical characteristics ............................................................................................................ 12

Parametric specifications........................................................................................................... 13

Digital signal processing............................................................................................................ 16

Audio outputs .............................................................................................................................. 18

10 Clock generation ......................................................................................................................... 22

11 Phase locked loop (PLL)............................................................................................................. 22

12 Digital interfaces ......................................................................................................................... 23

12.1 Codec start-up time............................................................................................................. 26

13 Functional description ................................................................................................................ 27

13.1 General description ............................................................................................................. 27

13.2 Input signal chain ................................................................................................................ 28

13.3 Microphone inputs ............................................................................................................... 29

13.4 Digital microphones............................................................................................................. 29

13.5 Auxiliary inputs .................................................................................................................... 30

13.6 Input mixers......................................................................................................................... 31

13.7 Stereo audio ADC ............................................................................................................... 31

13.8 Automatic level control (ALC) ............................................................................................. 32

13.9 Beep generator and controller ............................................................................................ 34

13.10 Output signal chain ............................................................................................................. 35

13.11 Stereo audio DAC ............................................................................................................... 35

13.12 Output mixer........................................................................................................................ 36

13.13 Headphone amplifier ........................................................................................................... 36

13.14 Speaker amplifier ................................................................................................................ 37

13.15 Charge pump control........................................................................................................... 37

13.16 Charge pump clock control ................................................................................................. 39

13.17 Boosting the charge pump using demand feedback control ............................................... 39

13.17.1

Tracking the demands on the charge pump output ............................................. 39

13.17.1.1

CP_MCHANGE = 00 (manual mode) .............................................. 39

13.17.1.2

CP_MCHANGE = 01 (tracking the PGA gain setting) ..................... 39

13.17.1.3

CP_MCHANGE = 10 (tracking the DAC signal setting) .................. 39

13.17.1.4

CP_MCHANGE = 11 (tracking the output signal magnitude).......... 39

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