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CS2000-CP-CZZR Datasheet(PDF) 8 Page - Cirrus Logic |
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CS2000-CP-CZZR Datasheet(HTML) 8 Page - Cirrus Logic |
8 / 36 page CS2000-CP 8 DS761PP1 AC ELECTRICAL CHARACTERISTICS Test Conditions (unless otherwise specified): VD = 3.1 V to 3.5 V; TA = -10°C to +70°C (Commercial Grade); CL =15pF. Notes: 3. 1 UI (unit interval) corresponds to tSYS_CLK or 1/fSYS_CLK. 4. tCS represents the time from the removal of CLK_IN by which CLK_IN must be re-applied to ensure that PLL_OUT continues while the PLL re-acquires lock. This timeout is based on the internal VCO frequen- cy, with the minimum timeout occurring at the maximum VCO frequency. Lower VCO frequencies will result in larger values of tCS. 5. Only valid in clock skipping mode; See “CLK_IN Skipping Mode” on page 14 for more information. 6. fCLK_OUT = 24.576 MHz; Sample size = 10,000 points; AuxOutSrc[1:0] = 11. 7. In accordance with AES-12id-2006 section 3.4.2. Measurements are Time Interval Error taken with 3rd order 100 Hz to 40 kHz bandpass filter. 8. In accordance with AES-12id-2006 section 3.4.1. Measurements are Time Interval Error taken with 3rd order 100 Hz Highpass filter. 9. 1 UI (unit interval) corresponds to tCLK_IN or 1/fCLK_IN. 10. The frequency accuracy of the PLL clock output is directly proportional to the frequency accuracy of the reference clock. Parameters Symbol Conditions Min Typ Max Units Crystal Frequency fXTAL Fundamental Mode 8 - 50 MHz Reference Clock Input Frequency fREF_CLK 8- 75 MHz Reference Clock Input Duty Cycle DREF_CLK 45 - 55 % Internal System Clock Frequency fSYS_CLK 8 18.75 MHz Clock Input Frequency (Auto R-Mod Disabled) fCLK_IN 50 Hz - 30 MHz Clock Input Frequency (Auto R-mod Enabled) fCLK_IN Auto R Modifier = 1 Auto R Modifier = 0.5 Auto R Modifier = 0.25 4 72 168 - - - 59 138 256 kHz kHz kHz Clock Input Pulse Width (Note 3)pwCLK_IN fCLK_IN < fSYS_CLK/96 fCLK_IN > fSYS_CLK/96 2 10 - - - - UI ns Clock Skipping Timeout tCS (Notes 4, 5)20 - - ms Clock Skipping Input Frequency fCLK_SKIP (Note 5) 50 Hz - 80 kHz PLL Clock Output Frequency fCLK_OUT 6- 75 MHz PLL Clock Output Duty Cycle tOD Measured at VD/2 48 50 52 % Clock Output Rise Time tOR 20% to 80% of VD - 1.7 3.0 ns Clock Output Fall Time tOF 80% to 20% of VD - 1.7 3.0 ns Period Jitter tJIT (Note 6) - 70 150 ps rms Base Band Jitter (100 Hz to 40 kHz) (Notes 6, 7) - 50 - ps rms Wide Band JItter (100 Hz Corner) (Notes 6, 8) - 175 - ps rms PLL Lock Time - CLK_IN (Note 9)tLC fCLK_IN < 200 kHz fCLK_IN > 200 kHz - - 100 1 200 3 UI ms PLL Lock Time - REF_CLK tLR fREF_CLK = 8 to 75 MHz - 1 2 ms Output Frequency Synthesis Resolution (Note 10)ferr High Resolution High Multiplication 0 0 - - ±0.5 ±112 ppm ppm |
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