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ADF41020 Datasheet(PDF) 11 Page - Analog Devices |
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ADF41020 Datasheet(HTML) 11 Page - Analog Devices |
11 / 16 page Data Sheet ADF41020 Rev. 0 | Page 11 of 16 Figure 16. N (A, B) Counter Latch Map DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 C2 (0) C1 (1) A1 A2 A3 A4 A5 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 A6 DB21 DB22 DB23 G1 0 0 0 1 1 0 F4 (FUNCTION LATCH) FASTLOCK ENABLE 1 1 A6 A5 .......... A2 A1 0 0 .......... 0 0 0 0 0 .......... 0 1 1 0 0 .......... 1 0 2 0 0 .......... 1 1 3 . . .......... . . . . . .......... . . . . . .......... . . . 1 1 .......... 0 0 60 1 1 .......... 0 1 61 1 1 .......... 1 0 62 1 1 .......... 1 1 63 0 0 B13 B12 B11 B3 B2 B1 0 0 0 .......... 0 0 0 0 0 0 .......... 0 0 1 0 0 0 .......... 0 1 0 0 0 0 .......... 0 1 1 3 . . . .......... . . . . . . . .......... . . . . . . . .......... . . . . 1 1 1 .......... 1 0 0 8188 1 1 1 .......... 1 0 1 8189 1 1 1 .......... 1 1 0 8190 1 1 1 .......... 1 1 1 8191 RESERVED 13-BIT B COUNTER 6-BIT A COUNTER CONTROL BITS A COUNTER DIVIDE RATIO B COUNTER DIVIDE RATIO NOT ALLOWED NOT ALLOWED 2 OPERATION CP GAIN CHARGE PUMP CURRENT SETTING 1 IS PERMANENTLY USED. CHARGE PUMP CURRENT SETTING 2 IS PERMANENTLY USED. CHARGE PUMP CURRENT SETTING 1 IS USED. CHARGE PUMP CURRENT IS SWITCHED TO SETTING 2. THE TIME SPENT IN SETTING 2 IS DEPENDENT ON WHICH FAST LOCK MODE IS USED. SEE FUNCTION LATCH DESCRIPTION. N = 4(BP + A), P IS A PRESCALER VALUE SET IN THE FUNCTION LATCH. B MUST BE GREATER THAN OR EQUAL TO A. FOR CONTINUOUSLY ADJACENT VALUES OF (N × FREF), AT THE OUTPUT, N MIN IS 4(P2 – P). BOTH OF THESE BITS MUST BE SET TO 0 FOR NORMAL OPERATION. |
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