NJU8719 Ver la hoja de datos (PDF) - Japan Radio Corporation
Número de pieza
componentes Descripción
Fabricante
NJU8719 Datasheet PDF : 6 Pages
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NJU38575159
! FUNCTIONAL DESCRIPTION
(1) Signal Output
The OUTP and OUTN generate PMW output signal, which is converted to analog signal via external 2nd-order
or higher LC filter. The NJU8719 drives a speaker by the BTL output, and OUTP is a positive output and OUTN
is a negative outputs.
A switching regulator with a high response against a voltage fluctuation is the best selection for the VDDO,
which is the power supply for output drivers. To obtain better T.H.D. performance, the stabilization of the power
is required.
(2) Standby Control Function
By setting the STBYB terminal to “L”, the NJU8719 becomes standby condition. During standby condition,
OUTP and OUTN are in Hi-Z.
(3) Master Clock
Master clock (MCK) synchronizes with the Audio signal input (IN). The setup time and the hold time should
be kept in the AC characteristics because IN is fetched with the rising edge of MCK. MCK requires jitter-free or
jitter as small as possible because the jitter downs S/N ratio.
OUTP and OUTN occur the pop noise when MCK is stopped in operation without standby mode. Therefore,
the standby mode should be set before MCK stop.
Ver.2004-05-20
-3-
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