[AK4492]
5. Connection Example with the AK4205
The AK4205 is a low-distorsion stereo headphone amplifier with an analog switch for Hi-Fi mobile
aplications. It integrates a gain setting resistor and a LPF, saving mounting area of the printing circuit
board. A connection example of the AK4492 and the AK44205 is shown below. Exposed pad (TAB) on the
bottom surface of the package should be connected to the gorund. System rayout should be designed so
that a noise interference between VSS and DVSS does not occure.
The AK8175A can be connected at the input stage of the AK4492 (Figure 75).
Power Supply
6V
Power Supply
AK4492
-5V
BICK
AUX In
(Lch)
BICK/BCK/DCLK(J1)
SDATA/DINL/DSDL(H1)
LRCK/DINR/DSDR(G1)
SMUTE/CSN(F1)
SLOW/CDTI/SDA(E1)
DIF0/DZFL(D1)
DIF1/DZFR(C1)
DEM0/DSDL(B1)
DVSS(K2)
SDATA
LRCK
External
10u 10u
0.1u 0.1u
VREFHR(A5,A6)
VREFLR(A7,A8)
VCMR(B8)
Regulator Circuit
DC 0V
1F
Rd
33
Headphone
Rch
AOUTRN(A9)
AOUTRP(B9)
DC 2.5V
DC 2.5V
470n
AUXA
MUTEN
NINA
0.1F
SWOUTA
1
2
3
4
5
6
7
8
9
27
26
25
24
TVDD(J2)
5VRWM
Zener
diode
1F
PINA
NC
NC
PDN(H2)
VDDR(C9,C10,D9)
VSSR(D10,E9,E10)
AVSSA
NC
SSLOW/WCK(G2)
TDMO(F2)
Css=0.1u
CAPSS
AK4205
SWVDD 3.3V
AK4205
Top View
SD/CCLK/SCL(E2)
DIF2/CAD0(D2)
HLOAD/I2C(C2)
GAIN/DSDR(B2)
ACKS/CAD1(A2)
DVDD(K3)
RVDD
RVSS
AVSSB
PINB
SWVDD 23
10u
0.1u
0.1u
10u
SWVSS
SEL
22
21
20
VSSL(F9,F10,G10)
VDDL(G9,H9,H10)
DC 2.5V
DC 2.5V
NC
1F
1F
470n
NINB
SWOUTB 19
AUXB
0.1F
AOUTLP(J9)
AOUTLN(K9)
5VRWM
Zener
diode
51ohm
CLK
MCLK(J3)
LDOE(H3)
Headphone
Lch
Rd
33
PSN(D3)
VCML(J8)
VREFLL(L7,K8)
VREFHL(K5,K6)
TDM1(B3)
0.1u 0.1u
10u 10u
TDM0/DCLK(A3)
AVDD(K4)
DC 0V
External
Regulator Circuit
0.1F
AUX In
(Rch)
AVSS(J4)
DCHAIN(B4)
NC
INVR(A4)
33kohm
ACPU
TESTE(B5)
EXTR(J5)
DVSS
0V
DVDD
1.8V
1F
VSS
0V
VDD
5V
DVSS VSS
Figure 76. Circuit Example with AK4205
016011073-E-00
2016/12
- 98 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
