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AD9548BCPZ-REEL7 Datasheet(PDF) 10 Page - Analog Devices |
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AD9548BCPZ-REEL7 Datasheet(HTML) 10 Page - Analog Devices |
10 / 112 page AD9548 Rev. 0 | Page 10 of 112 TIME DURATION OF DIGITAL FUNCTIONS Table 13. Parameter Min Typ Max Unit Test Conditions/Comments TIME DURATION OF DIGITAL FUNCTIONS EEPROM-to-Register Download Time 25 ms Using default EEPROM storage sequence (see Register 0E10 to Register 0E3F) Register-to-EEPROM Upload Time 200 ms Using default EEPROM storage sequence (see Register 0E10 to Register 0E3F Minimum Power-Down Exit Time 10.5 μs Dependent on loop-filter bandwidth Maximum Time from Assertion of the RESET pin to the M0 to M7 Pins Entering High Impedance State 45 ns DIGITAL PLL Table 14. Parameter Min Typ Max Unit Test Conditions/Comments DIGITAL PLL Phase-Frequency Detector (PFD) Input Frequency Range 1 107 Hz Maximum fPFD1: fS/1002 Loop Bandwidth 0.001 105 Hz Programmable design parameter; maximum fLOOP = fREF/(20R)3 Phase Margin 30 89 Degrees Programmable design parameter Reference Input (R) Division Factor 1 230 1, 2, …, 1,073,741,824 Integer Feedback (S) Division Factor 8 230 8, 9, …, 1,073,741,824 Fractional Feedback Divide Ratio 0 0.999 Maximum value: 1022/1023. 1 fPFD is the frequency at the input to the phase-frequency detector. 2 fS is the sample rate of the output DAC. 3 fREF is the frequency of the active reference; R is the frequency division factor determined by the R-divider. DIGITAL PLL LOCK DETECTION Table 15. Parameter Min Typ Max Unit Test Conditions/Comments PHASE LOCK DETECTOR Threshold Programming Range 0.001 65.5 ns Threshold Resolution 1 ps FREQUENCY LOCK DETECTOR Threshold Programming Range 0.001 16,700 ns Reference-to-feedback period difference Threshold Resolution 1 ps HOLDOVER SPECIFICATIONS Table 16. Parameter Min Typ Max Unit Test Conditions/Comments HOLDOVER SPECIFICATIONS Frequency Accuracy <0.01 ppm Excludes frequency drift of SYSCLK source; excludes frequency drift of input reference prior to entering holdover |
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