DA9066 datasheet(5/257 Pages) RENESAS

5 / 257 page

DA9066

System PMIC for Dual/Quad-Core Processors

Datasheet

Revision 2.1

21-Feb-2022

CFR0011-120-00

5 of 256

11 Audio Electrical Characteristics ................................................................................................ 89

11.1 Reference Voltage Generation and Temperature Supervision........................................... 89

11.2 Audio Inputs ........................................................................................................................ 89

11.2.1

Microphone Bias .................................................................................................. 89

11.2.2

Input Amplifiers .................................................................................................... 90

11.2.3

Stereo Audio ADC ............................................................................................... 91

11.3 Audio Outputs ..................................................................................................................... 92

11.3.1

Stereo Audio DAC ............................................................................................... 92

11.3.2

True-Ground Headphone Amplifier ..................................................................... 93

11.3.3

Receiver/Earpiece Amplifier ................................................................................ 94

11.3.4

Class-D Speaker Driver ....................................................................................... 95

11.3.5

True-Ground Current Doubler ............................................................................. 96

11.4 Accessory Detection ........................................................................................................... 96

11.5 Codec Start-Up Time .......................................................................................................... 96

11.6 Clock Generation ................................................................................................................ 97

11.6.1

Audio Reference Oscillator.................................................................................. 97

11.6.2

MCLK Input.......................................................................................................... 97

11.6.3

Phase Lock Loop (PLL) ....................................................................................... 97

11.7 Digital Interfaces ................................................................................................................. 98

11.7.1

I/O Characteristics ............................................................................................... 98

11.7.2

I2C Control Bus .................................................................................................... 98

11.8 Digital Audio Interface ....................................................................................................... 100

12 Audio Functional Description .................................................................................................. 101

12.1 Input Signal Chain............................................................................................................. 101

12.1.1

Analog Microphones .......................................................................................... 102

12.1.2

Digital Microphones ........................................................................................... 102

12.1.3

Microphone Biases ............................................................................................ 103

12.1.4

Auxiliary Inputs .................................................................................................. 103

12.1.5

Input Mixers ....................................................................................................... 104

12.1.6

Stereo Audio ADC ............................................................................................. 104

12.1.7

Audio Accessory Detection................................................................................ 105

12.2 Outputs Signal Chain ........................................................................................................ 106

12.2.1

Stereo Audio DAC ............................................................................................. 106

12.2.2

Output Mixers .................................................................................................... 107

12.2.3

Receiver/Earpiece Amplifier .............................................................................. 107

12.2.4

Stereo Headphone Amplifier ............................................................................. 108

12.2.5

Speaker Amplifier .............................................................................................. 108

12.2.5.1

Distortion and Power Limiter ......................................................... 108

12.2.6

Charge Pump Control ........................................................................................ 109

12.2.6.1

Charge Pump Clock Control.......................................................... 111

12.2.6.2

Boosting the Charge Pump Using Demand Feedback Control..... 111

12.2.6.3

Tracking the Demands on the Charge Pump Output .................... 111

12.2.6.4

Specifying Clock Frequencies when Tracking the Charge Pump

Output Demand ............................................................................. 112

12.2.6.5

Controlling the Boost of the Charge Pump Clock-Frequency ....... 112

12.2.6.6

Other Charge Pump Controls ........................................................ 113

12.3 Digital Signal Processing .................................................................................................. 114

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