[AK4376A]

016014206-E-00

2016/11

- 2 -

3. Table of Contents

1.

General Description ........................................................................................................................... 1

2.

Features ............................................................................................................................................. 1

3.

Table of Contents ............................................................................................................................... 2

4.

Block Diagram and Functions............................................................................................................ 4

5.

Pin Configurations and Functions...................................................................................................... 5

■ Pin Configurations............................................................................................................................... 5

■ Pin Functions ...................................................................................................................................... 6

■ Handing of Unused Pins ..................................................................................................................... 8

6.

Absolute Maximum Ratings ............................................................................................................... 9

7.

Recommended Operating Conditions ............................................................................................... 9

8.

Electrical Characteristics.................................................................................................................. 10

■ Analog Characteristics ...................................................................................................................... 10

■ PLL Characteristics ........................................................................................................................... 13

■ Charge Pump & LDO Circuit Power-up Time ................................................................................... 13

■ Power Supply Current....................................................................................................................... 13

■ Power Consumptions for Each Operation Mode .............................................................................. 14

■ DAC Sharp Roll-Off Filter (fs = 44.1 kHz)......................................................................................... 15

■ DAC Sharp Roll-Off Filter (fs = 96 kHz)............................................................................................ 15

■ DAC Sharp Roll-Off Filter (fs = 192 kHz).......................................................................................... 16

■ DAC Slow Roll-Off Filter (fs = 44.1 kHz)........................................................................................... 17

■ DAC Slow Roll-Off Filter (fs = 96 kHz).............................................................................................. 17

■ DAC Slow Roll-Off Filter (fs = 192 kHz)............................................................................................ 18

■ DAC Short Delay Sharp Roll-Off Filter (fs = 44.1 kHz)..................................................................... 19

■ DAC Short Delay Sharp Roll-Off Filter (fs = 96 kHz)........................................................................ 19

■ DAC Short Delay Sharp Roll-Off Filter (fs = 192 kHz)...................................................................... 20

■ DAC Short Delay Slow Roll-Off Filter (fs = 44.1 kHz)....................................................................... 21

■ DAC Short Delay Slow Roll-Off Filter (fs = 96 kHz).......................................................................... 21

■ DAC Short Delay Slow Roll-Off Filter (fs = 192 kHz)........................................................................ 22

■ DC Characteristics ............................................................................................................................ 23

■ Switching Characteristics.................................................................................................................. 24

■ Timing Diagram (System Clock) ....................................................................................................... 26

■ Timing Diagram (Serial Audio I/F) .................................................................................................... 27

■ Timing Diagram (I

■ Timing Diagram (Reset).................................................................................................................... 28

9.

Functional Description ..................................................................................................................... 29

■ System Clock .................................................................................................................................... 29

■ PLL .................................................................................................................................................... 33

■ Input Clock Select Function .............................................................................................................. 33

■ DACMCLK Generating Divider Setting ............................................................................................. 36

■ Crystal Oscillator ............................................................................................................................... 36

■ DAC Digital Filter............................................................................................................................... 37

■ Digital Mixing ..................................................................................................................................... 37

■ Digital Volume ................................................................................................................................... 38

■ Headphone Amplifier Output (HPL/HPR pins).................................................................................. 39

■ Charge Pump & LDO Circuits ........................................................................................................... 47

■ Serial Audio Interface........................................................................................................................ 48

■ Power-up & Operation Mode ............................................................................................................ 49

■ Serial Control Interface (I

■ Control Sequence ............................................................................................................................. 54

■ Register Map..................................................................................................................................... 56