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STA529 Datasheet(PDF) 21 Page - STMicroelectronics

Part # STA529
Description  2 x 100 mW class-D amplifier with analog or digital input 2.0 multichannel digital audio processor with FFX
PDF  58 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA529 Datasheet(HTML) 21 Page - STMicroelectronics

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STA529
PLL
21/58
Example 1:
FXTI = 13 MHz
Fs = 44.1 kHz
IDF should be equal to 3 otherwise LDF become less than 8 (FRAC_CTRL must be 1):
LDF = floor(45.1584/(13/IDF)) = 10
FRACT = round([(45.1584/(13/ IDF))-floor(45.1584/(13/ IDF))]*216) = 27602
(where:
floor: rounded towards zero
round: rounded real number to nearest integer)
Using the above configuration, the system clock is 45.15841675 MHz, the approximate
static error is 16 Hz (that is, 0.5 ppm).
Example 2:
FXTI = 19.2 MHz
Fs = 48 kHz
IDF should be equal to 4 otherwise LDF become less than 8 (FRAC_CTRL must be 1):
LDF = floor(49.152/(19.2/IDF)) = 10
FRACT = round([(49.152/(19.2/IDF))-floor(49.152/(19.2/IDF))]*216) = 15728
Using the above configuration, the system clock is 49.151953125 MHz, the approximate
static error is 47 Hz (that is, 1 ppm).



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