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ADF7012 Datasheet(PDF) 24 Page - Analog Devices |
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ADF7012 Datasheet(HTML) 24 Page - Analog Devices |
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24 / 28 page ![]() ADF7012 Rev. 0 | Page 24 of 28 REGISTER DESCRIPTIONS R REGISTER D1 CRYSTAL DOUBLER 0 CRYSTAL DOUBLER OFF 1 CRYSTAL DOUBLER ON X1 XOEB 0 XTAL OSCILLATOR ON (DEFAULT) 1 XTAL OSCILLATOR OFF OD2 OD1 OUTPUT DIVIDER 0 DISABLED 0 DIVIDE BY 2 1 DIVIDE BY 4 1 0 1 0 1 DIVIDE BY 8 VA2 VA1 VCO ADJUST 0 NO VCO ADJUSTMENT 0(FCENTER – (1 × f)) 1(FCENTER – (2 × f)) 1 0 1 0 1(FCENTER – (3 × f)) CL4 CL3 CL2 CL1 CLKOUT DIVIDE RATIO 0 2 0 0 0 . . 1 1 0 1 0 . . 0 4 6 8 . . 0 1 1 0 . . 0 0 0 1 . . . 16 (DEFAULT) . . . 1 28 11 1 1 1 30 RL4 RL3 RL2 RL1 RF R COUNTER DIVIDE RATIO 0 1 0 0 0 . . . 1 0 1 0 . . . 2 3 4 . . 0 1 1 0 . . 0 0 0 1 . . . . 10 . 0 1 12 11 0 1 13 10 1 1 14 11 1 1 15 11-BIT FREQUENCY ERROR CORRECTION 4-BIT R DIVIDER CLOCK OUT DIVIDER VCO ADJUST OUTPUT DIVIDER F-COUNTER OFFSET +1023 +1022 . +1 +0 –1 –0 –1 –1023 –1024 F11 0 0 0 0 0 1 1 . 1 1 e.g., F-COUNTER OFFSET = 1, FRACTIONAL OFFSET = 1/215 ....... ....... ....... ....... ....... ....... ....... ....... ....... ....... ....... F3 1 1 . 0 0 1 1 . 0 0 F2 0 0 . 0 0 1 1 . 0 0 F1 0 1 . 1 0 1 0 . 1 0 Figure 41. |
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