
[AK4671] 
MS0666-E-00 
2007/10 
- 10 - 
LOUT2 pin
ROUT2 pin
HP-Amp
100
μ
F
C1
16
Ω
C2
0.22
μ
F
10
Ω
Measurement Point
Figure 2. Headphone-Amp output circuit 
Parameter 
Mono Line Output Characteristics:
 Stereo DAC 
→
 LOP/LON pins, ALC=OFF, IVOL=0dB, OVOL=0dB, 
L3VL=0dB, LODIF bit = “1”, R
L
=10k
Ω
 for each pin (Full-differential) 
Output Voltage (
Note 20
) 
S/(N+D) (0dBFS) 
S/N (A-weighted) 
Load Resistance (LOP/LON pins, respectively) 
Load Capacitance (LOP/LON pins, respectively) 
(
Note 21
) 
Single-ended Line Input:
 LIN1/RIN1/LIN2/RIN2/LIN3/RIN3/LIN4/RIN4 pins; 
(MDIF1=MDIF2=MDIF3=MDIF4 bits = “0”) 
Maximum Input Voltage (
Note 22
) 
Gain 
Input
LOUT1/ROUT1/LOUT2/ROUT2/LOUT3/ROUT3 (LODIF=RCV bits = “0”) 
Input 
 RCP/RCN/LOP/LON (LODIF=RCV bits = “1”) 
Full-differential Line Input:
 IN1+/
, IN2+/
, IN3+/
, IN4+/
 pins; 
(MDIF1=MDIF2=MDIF3=MDIF4 bits = “1”) 
Maximum Input Voltage (
Note 23
) 
Gain 
Input
LOUT1/ROUT1/LOUT2/ROUT2/LOUT3/ROUT3 (LODIF=RCV bits = “0”) 
Input 
 RCP/RCN/LOP/LON (LODIF=RCV bits = “1”, 
Note 24
) 
Power Supply Current:
Power Up (PDN pin = “H”, All Circuits Power-up) 
(
Note 25
) 
(
Note 26
) 
(
Note 27
) 
Power Down (PDN pin = “L”) (
Note 28
) 
AVDD+PVDD+DVDD 
+TVDD2+TVDD3+SAVDD 
Note 20. Output voltage is proportional to AVDD voltage. Vout = (LOP) 
 (LON) = 1.2 x AVDD (typ). 
Note 21. Load Capacitance for VSS1. 
Note 22. Maximum Input voltage which analog output does not clip is proportional to AVDD voltage. Vin = 0.6 x AVDD 
(typ). 
Note 23. Maximum Input voltage which analog output does not clip is proportional to AVDD voltage. Vin = (IN4+) 
(IN4
) = 0.6 x AVDD (typ). 
Note 24. Vout = (RCP) 
 (RCN) at RCV bit = “1”, Vout = (LOP) 
 (LON) at LODIF bit = “1”. 
Note 25. EXT Slave Mode and LP bit = “0”, fs=44.1kHz, PMMICL = PMMICR = PMADL = PMADR = PMDAL = 
PMDAR = PMLO1 = PMRO1 = PMLO2 = PMRO2 = PMLO2S = PMRO2S = PMLO3 = PMRO3 =PMSAD = 
min 
typ 
max 
Units 
3.52 
75 
85 
10 
3.96 
85 
95 
- 
4.36 
- 
- 
- 
Vpp 
dB 
dB 
k
Ω
- 
- 
30 
pF 
- 
1.98 
- 
Vpp 
1 
0 
+1 
- 
dB 
dB 
- 
+6 
- 
1.98 
- 
Vpp 
1 
0 
+1 
- 
dB 
dB 
- 
+6 
- 
- 
- 
21 
23 
8 
- 
mA 
mA 
mA 
30 
12 
AVDD+PVDD+DVDD 
+TVDD2+TVDD3+SAVDD 
- 
1 
30 
μ
A