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STA538 Datasheet(PDF) 18 Page - STMicroelectronics

Part # STA538
Description  2 x 1.3 W class-D amplifier with analog or digital input 2.0 multichannel digital audio processor with FFX
PDF  59 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA538 Datasheet(HTML) 18 Page - STMicroelectronics

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PLL
STA538
18/59
5
PLL
Figure 4 shows the main components of the PLL.
Figure 4.
PLL block diagram
Input frequency
Output
frequency
divider
Loop frequency divider
CLKIN
LOCKP
FVCO
IDF
Lock detect
INFIN
FBCLK
Phase
Buffer
Fractional controller
VCO
INFIN
FBCLK
DITHER_DISABLE
FRAC_INPUT
NDIV
PHI
INFOUT
divider
Charge
REFOUT
LF
FILT
VCONT
pump and
loop filter
STRB
STRB_
FRAC_CTRL
BYPASS
frequency
divider
(PFD)



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