JAJSFM4A December 2018 – December 2018 LMK05318
PRODUCTION DATA.
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The APLL2 fractional N divider includes a 9-b integer portion (INT), a 24-b numerator portion (NUM), a fixed 24-b denominator portion (DEN), and a sigma-delta modulator. The INT and NUM are programmable, while the denominator is fixed to 224 for high frequency resolution on the VCO2 clock. The total APLL2 N divider value is: N = INT + NUM / 224.
The PFD frequency and total N divider for APLL2 determine the VCO2 frequency, which can be computed by Equation 7.