LC89091JA Datasheet, PDF (9/30 Pages) ON Semiconductor – Digital Audio Interface Receiver

LC89091JA
8.3 Oscillation Amplifier Pin Settings (XIN, XOUT)
 The LC89091JA has a built-in oscillation amplifier, and connects a quartz resonator, feedback resistor and load
capacitance to XIN and XOUT to configure an oscillation circuit. The figure below shows the connection diagram.
 When connecting a quartz resonator, use one with a fundamental wave, and be aware that the load capacitance
depends on the quartz resonator characteristics, so thorough investigation should be made.
 If the built-in oscillation amplifier is not used and an oscillation module is used as the clock source instead, connect
the output of an external clock supply source to XIN. At this time, it is not necessary to connect a feedback resistor
between XIN and XOUT.
 Always supply 24.576MHz clock to XIN.
 XIN clock is output to MCKO, BCKO and LRCKO while PLL is locked.
XIN
XOUT
13
14
1p to 33pF
1M
24.576MHz
150 to 2.2k
1p to 33pF
XIN
13
24.576MHz
XOUT
14
Open
(a) XIN and XOUT Quartz Resonator Connection Diagram (b) XIN External Clock Input Diagram
Figure 8.2: XIN and XOUT External Circuit Connection Diagram
8.4 Loop Filter Pin Setting (LPF)
 The LC89091JA has a built-in VCO (Voltage Controlled Oscillator)
that synchronizes with sampling frequencies from 32kHz to
192kHz and with the data with a transfer rate from 4MHz to 25MHz.
 The PLL is locked at 512fs.
 LPF is a pin for the PLL loop filter. Connect the resistor and
capacitors shown in the right figure, as close to the pin as possible.
PGND
2
0.1F
LPF
1
0.022F
100
Figure 8.3: LPF External Circuit Connection Diagram
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