AK4205EN Datasheet, PDF (2/25 Pages) Asahi Kasei Microsystems – Ultra Low Noise and Distortion Headphone Amp with Analog Switch

[AK4205]
3. Table of Contents
1. General Description............................................................................................................................. 1
2. Features............................................................................................................................................... 1
3. Table of Contents................................................................................................................................. 2
4. Block Diagram ..................................................................................................................................... 3
5. Pin Configurations and Functions ....................................................................................................... 4
■ Pin Configurations ............................................................................................................................. 4
■ Pin Functions..................................................................................................................................... 5
6. Absolute Maximum Ratings................................................................................................................. 6
7. Recommended Operating Conditions ................................................................................................. 7
8. Electrical Characteristics ..................................................................................................................... 8
■ Analog Characteristics ...................................................................................................................... 8
■ DC Characteristics ...........................................................................................................................11
■ Switching Characteristics .................................................................................................................11
■ Headphone-amp Power-up/down Timing ........................................................................................11
■ Timing Diagram ............................................................................................................................... 12
9. Functional Descriptions ..................................................................................................................... 13
9.1 System Reset ................................................................................................................................. 13
9.2 Charge Pump Circuit ...................................................................................................................... 13
9.3 Analog Switch & Mute Circuits ....................................................................................................... 14
9.4 Headphone Amplifier ...................................................................................................................... 15
9.5 Control Sequence ........................................................................................................................... 16
■ Analog Switch Power-up/down Sequence ...................................................................................... 16
■ Hi-Fi Mode ⇔ AUX Mode Pop Noiseless Change Sequence ...................................................... 18
10. Recommended External Circuits ................................................................................................... 19
10.1. General Example of External Circuit ........................................................................................... 19
10.2 Example of the connection with AK4492 ...................................................................................... 21
11. Example of Layout ......................................................................................................................... 22
12. Package ......................................................................................................................................... 23
■ Outline Dimensions ......................................................................................................................... 23
■ Material & Lead finish...................................................................................................................... 23
■ Marking............................................................................................................................................ 23
13. Ordering Guide............................................................................................................................... 24
■ Ordering Guide................................................................................................................................ 24
14. Revision History ............................................................................................................................. 24
IMPORTANT NOTICE.............................................................................................................................. 25
016012367-E-00
-2-
2016/12