AK4205EN Datasheet, PDF (17/25 Pages) Asahi Kasei Microsystems – Ultra Low Noise and Distortion Headphone Amp with Analog Switch

[AK4205]
SWVDD pin
RSTN pin
MUTEN pin
SEL pin
CAPSS pin
Switch State
(1) _>1ms
(2)
>5ms
>2ms
(8)
>1ms
(7)
2.5V
1.4V
OFF
(3)
> 300ms
> 300ms
(6)
> 300ms
(4)
(5)
typ. 220ms
OFF→AUX
AUX
typ. 220ms
AUX→Hi-Fi
Hi-Fi
Hi-Fi→AUX
AUX
OFF
AUXA/B pins 0V
SWINA/B pins 0V
SWOUTA/B pins 0V
Figure 13. Power-Up/Down Sequence
<Power down Sequence>
(5) It is recommended that the data path is switched to AUX by setting the SEL pin = “L” to avoid pop
noise in power down sequence.
(6) Stopping switch output: MUTEN pin “H” → “L”
When the MUTEN pin = "L", SWOUTA / B pins turns off momentarily. In order to
avoid pop noise, set the MUTEN pin = "L" after 300 ms or more from the SEL pin = "L".
(7) After muting the output: RSTN pin “L” → “H”
After 1 ms from muting the output, set the RSTN pin to “L”.
(8) After 2 ms or more from the RSTN pin = "L", turn off SWVDD power supply.
016012367-E-00
- 17 -
2016/12