AK4205EN Datasheet, PDF (5/25 Pages) Asahi Kasei Microsystems – Ultra Low Noise and Distortion Headphone Amp with Analog Switch

[AK4205]
■ Pin Functions
No. Pin Name I/O
Function
1 NINA
I Negative Analog Input A Pin
2 PINA
I Positive Analog Input A Pin
3 AVSSA
- Analog Ground A Pin
4 NC
- No Connect pin. This pin should be connected to VSS.
5 RVDD
- Reference Power Supply, 4.5 ~ 6.5 V
6 RVSS
- Reference Ground Pin
7 AVSSB
- Analog Ground B Pin
8 PINB
I Positive Analog Input B Pin
9 NINB
I Negative Analog Input B Pin
10 NC
- No Connect pin. This pin should be connected to VSS.
11 NC
- No Connect pin. This pin should be connected to VSS.
12 PVEEB
- Headphone Amp Negative Power Supply B Pin, -4.5 ~ -5.5 V
13 AMPOUTB
O Headphone Amp Output B Pin
14 PVDDB
- Headphone Amp Positive Power Supply B Pin, 4.5 ~ 6.5 V
15 NC
- No Connect pin. This pin should be connected to VSS.
16 NC
- No Connect pin. This pin should be connected to VSS.
17 SWINB
I HiFi Path Switch Input B Pin
18 AUXB
I AUX Path Switch Input B Pin
19 SWOUTB
O Switch Output B Pin
20 NC
- No Connect pin. This pin should be connected to VSS.
21 SEL
I
HiFi/AUX Path Select Pin
“H”: HiFi Path (SWINA/B pins), “L”: AUX Path (AUXA/B pins)
22 SWVSS
- Switch Ground Pin
23 SWVDD
- Switch Power Supply Pin, 3.0 ~ 3.6 V
24 CAPSS
O Soft Start Capacitor Terminal Pin
25 NC
- No Connect pin. This pin should be connected to VSS.
26 NC
- No Connect pin. This pin should be connected to VSS.
27 SWOUTA
O Switch Output A Pin
28 AUXA
I AUX Path Switch Input A Pin
29 SWINA
I Hi-Fi Path Switch Input A Pin
30 NC
- No Connect pin. This pin should be connected to VSS.
31 NC
- No Connect pin. This pin should be connected to VSS.
32 PVDDA
- Headphone-Amp Positive Power Supply A Pin, 4.5 ~ 6.5 V
33 AMPOUTA
O Headphone-Amp Output A Pin
34 PVEEA
- Headphone-Amp Negative Power Supply A Pin, -4.5 ~ -5.5 V
Reset Pin
35 RSTN
I
When “L”, the AK4205 is held in reset.
The AK4205 must be always reset upon power-up.
Mute Control pin
36 MUTEN
I
“H”: Normal Operation
“L”: SWOUTA and SWOUTB pins are mute state.
Exposed Pad
-
The exposed pad on the bottom surface of the package should be
connected to VSS. (Note 2)
Note 1. All digital input pins (SEL, RSTN, MUTEN pins) expect analog input/output pins (NINA, PINA,
PINB, NINB, SWINB, AUXB, AUXA, SWINA) should not be left floating. I/O pins should be
processed appropriately.
Note 2. Exposed Pad is not connected to VSS internally.
016012367-E-00
-5-
2016/12