SM6451A Datasheet, PDF (12/13 Pages) Nippon Precision Circuits Inc – Audio Variable Volume IC

Connection 2
SM6451A
3.3R
L-ch Input
4Vrms
3.3R
R-ch Input
R
1.2Vrms
R
LIN LOUT
SM6451
RIN ROUT
3.3R
R
3.3R
R
L-ch Output
R-ch Output
The SM6451A uses a 1.2Vrms input reference amplitude. If the input signal is 4Vrms, then the input must be
reduced by a factor of 1/3.3, and the output increased by a factor of 3.3.
Connection 3
L-ch Input
R-ch Input
AVDD
LIN LOUT
SM6451
RIN ROUT
AVSS
L-ch Output
R-ch Output
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.
SEIKO NPC CORPORATION —12