AK4492ECB Datasheet, PDF (98/101 Pages) Asahi Kasei Microsystems – Quality Oriented 32-Bit 2ch DAC

[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).
BICK
SDATA
LRCK
0.1F
MCLK
0.1F
51ohm
0.1F
DVSS
DVDD
0V _1F 1.8V
AK4492
BICK/BCK/DCLK(J1)
SDATA/DINL/DSDL(H1)
LRCK/DINR/DSDR(G1)
SMUTE/CSN(F1)
VREFHR(A5,A6)
VREFLR(A7,A8)
External
Regulator Circuit
SLOW/CDTI/SDA(E1)
DIF0/DZFL(D1)
VCMR(B8)
1F
DIF1/DZFR(C1)
DEM0/DSDL(B1)
DVSS(K2)
AOUTRN(A9)
AOUTRP(B9)
DC 2.5V
TVDD(J2)
PDN(H2)
SSLOW/WCK(G2)
TDMO(F2)
VDDR(C9,C10,D9)
VSSR(D10,E9,E10)
1F
DC 2.5V
SD/CCLK/SCL(E2)
DIF2/CAD0(D2)
HLOAD/I2C(C2)
GAIN/DSDR(B2)
ACKS/CAD1(A2)
VSSL(F9,F10,G10)
VDDL(G9,H9,H10)
1F
DC 2.5V
DVDD(K3)
MCLK(J3)
AOUTLP(J9)
AOUTLN(K9)
DC 2.5V
LDOE(H3)
PSN(D3)
TDM1(B3)
TDM0/DCLK(A3)
AVDD(K4)
AVSS(J4)
VCML(J8)
VREFLL(L7,K8)
VREFHL(K5,K6)
1F
External
Regulator Circuit
DCHAIN(B4)
INVR(A4)
TESTE(B5)
NC
EXTR(J5)
33kohm
VSS
DVSS VSS
0V
VDD
5V
Power Supply
6V
Power Supply
-5V
MUTEN
1 NINA
2 PINA
3 AVSSA
4 NC
5 RVDD
10u 0.1u
6 RVSS
7 AVSSB
8 PINB
9 NINB
10u 10u
0.1u 0.1u
AUX In
(Lch)
DC 0V
Rd
33
AK42^A0^K5⁴²⁰⁵
Top View
Rd
33
0.1u 0.1u
10u 10u
Headphone
Rch
AUXA
SWOUTA 27
470n
NC 26
NC 25
CAPSS 24
SWVDD 23
SWVSS 22
Css=0.1u
5VRWM
Zener
diode
SWVDD 3.3V
0.1u 10u
SEL 21
NC 20
SWOUTB 19
AUXB
470n
5VRWM
Zener
diode
Headphone
Lch
AUX In
(Rch)
DC 0V
ACPU
Figure 76. Circuit Example with AK4205
016011073-E-00
- 98 -
2016/12