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STW81100 데이터시트(PDF) 7 Page - STMicroelectronics |
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STW81100 데이터시트(HTML) 7 Page - STMicroelectronics |
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7 / 29 page ![]() 7/29 STW81100 Notes: 1. Frequency step higher than FOUT/4096 (i.e. N values less than 4096) can be used but it is not guaranteed the channel contiguity (Only configurations with B>A and fPFD ≤ 10 MHz are allowed) 2. see relationship between ICP and REXT in the Circuit Description section (Charge Pump) 3. PFD frequency leakage (400KHz) and harmonics 4. Guaranteed by design and characterization. Table 7. Phase Noise Performance1 Symbol Parameter Test Condition Min Typ Max Units ILOBUF Current Consumption DIV4 Buff 26 mA DIV2 Buff 23 mA Direct Output 37 mA EXTERNAL VCO (Test purpose only) fINVCO Frequency range 3.3 4.4 GHz PIN Input level 0 +6 dBm VINDC DC Input level 2 V IEXTBUF Current Consumption VCO Internal Buffer 15 mA PLL MISCELLANEOUS IPLL Current Consumption Input Buffer, Prescaler, Digital Dividers, misc 10 mA tLOCK Lock up time4 40 KHz PLL bandwidth; within 1 ppm of frequency error 150 µs Parameter Test Condition Min Typ Max Units In Band Phase Noise – Closed Loop2 Normalized In Band Phase Noise Floor ICP= 2mA, PLL BW = 50KHz; including reference clock contribution -212 dBc/Hz In Band Phase Noise Floor Direct Output -212+20log(N)+10log(fPFD)dBc/Hz In Band Phase Noise Floor Divider by 2 -218+20log(N)+10log(fPFD)dBc/Hz In Band Phase Noise Floor Divider by 4 -224+20log(N)+10log(fPFD)dBc/Hz PLL Integrated Phase Noise with Divider by 2 Integrated Phase Noise (single sided) 400Hz to 4MHz ICP = 4mA, fPFD = 400KHz (N = 10000), PLL BW = 15KHz -39 -37 dBc Integrated Phase Noise (single sided) 100Hz to 25MHz -38 -36 dBc VCO A Direct (3300MHz-3900MHz) – Open Loop Phase Noise @ 1 KHz -56 -53 dBc/Hz Phase Noise @ 10 KHz -83 -82 dBc/Hz Phase Noise @ 100 KHz -105 -102 dBc/Hz Phase Noise @ 1 MHz -128 -125 dBc/Hz Phase Noise @ 10 MHz -148 -145 dBc/Hz Phase Noise @ 40 MHz -156 -153 dBc/Hz Table 6. Electrical Characteristcs (continued) |
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