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AD9544/PCBZ 数据表(PDF) 11 Page - Analog Devices |
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AD9544/PCBZ 数据表(HTML) 11 Page - Analog Devices |
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11 / 62 page ![]() Data Sheet AD9544 Rev. 0 | Page 11 of 62 DIGITAL PLL LOCK DETECTION SPECIFICATIONS Table 11. Parameter Min Typ Max Unit Test Conditions/Comments PHASE LOCK DETECTOR Threshold Programming Range 10 224 − 1 ps Threshold Resolution 1 ps FREQUENCY LOCK DETECTOR Threshold Programming Range 10 224 − 1 ps Threshold Resolution 1 ps PHASE STEP DETECTOR Threshold Programming Range 100 232 − 1 ps Setting this value too low causes false triggers Threshold Resolution 1 ps HOLDOVER SPECIFICATIONS Table 12. Parameter Min Typ Max Unit Test Conditions/Comments HOLDOVER SPECIFICATIONS Initial Frequency Accuracy ±0.01 ±0.1 ppb AD9544 is configured using Configuration 1 from Table 21; excludes frequency drift of system clock (SYSCLK) source; excludes frequency drift of input reference prior to entering holdover; 160 ms history timer; history holdoff setting of 8; three holdover history features (bits) are enabled: delay history until frequency lock bit, delay history until phase lock bit, and delay holdover history accumulation until not phase slew limited bit Relative Frequency Accuracy Between Channels Cascaded Operation 0 ppb History Averaging Window 0.001 268435 sec ANALOG PLL (APLL0, APLL1) SPECIFICATIONS Table 13. Parameter Min Typ Max Unit VCO FREQUENCY RANGE Analog PLL0 (APLL0) 2424 3232 MHz Analog PLL1 (APLL1) 3232 4040 MHz PHASE FREQUENCY DETECTOR (PFD) INPUT FREQUENCY RANGE 162 350 MHz LOOP BANDWIDTH 260 kHz PHASE MARGIN 68 Degrees OUTPUT CHANNEL DIVIDER SPECIFICATIONS Table 14. Parameter Min Typ Max Unit Test Conditions/Comments OUTPUT PHASE ADJUST STEP SIZE 1 tVCO tVCO = 1/(APLLx VCO frequency), where x = 0, 1 |
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