SM6451B Datasheet, PDF (11/12 Pages) Nippon Precision Circuits Inc – Audio Variable Volume IC

SM6451B
TYPICAL APPLICATIONS
Connection Guidelines
Decoupling capacitors of approximately 10 µF should be connected from AVDD, VRL, VRR to AVSS, and
from DVDD to DVSS.
In addition, approximately 0.01 µF capacitors should also be connected from AVDD, VRL, VRR to AVSS, and
from DVDD to DVSS to suppress digital switch noise.
An approximately 0.001 µF capacitor connected from RSTN to DVSS will force a system reset when power is
applied.
Connection 1 (to DAC)
CPU
DAC
MDT MCK MLEN
LPF
LIN
LOUT
LPF
RIN
ROUT
2.5 to 3.6V
SM6451
DVDD
DVSS
AVDD
ADRS1
AVSS
ADRS2
L-ch OUT
R-ch OUT
Connection 2
When there is a possibility that the input peak-to-peak amplitude will exceed the supply voltage, input protec-
tion diodes should be connected to prevent device breakdown.
L-ch Input
R-ch Input
AVDD
LIN LOUT
SM6451
RIN ROUT
AVSS
L-ch Output
R-ch Output
NIPPON PRECISION CIRCUITS INC.—11