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AK2401 Scheda tecnica(PDF) 18 Page - Asahi Kasei Microsystems |
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AK2401 Scheda tecnica(HTML) 18 Page - Asahi Kasei Microsystems |
18 / 103 page [AK2401] 017003093-E-00 2017/3 18 10.1.3. LOCAL BUFFER+LOCAL DIVIDER (RX) Parameter Min. Typ. Max. Unit Description LOIN Input Sensitivity -5 0 5 dBm Output Frequency Range no div 300 600 MHz 4 levels by <Address0x12> DIVSEL[1:0] bit 2 div 50 1200 MHz 4 div 30 600 MHz 8 div 30 300 MHz 10.1.4. PLL SYNTHESIZER BIAS2 pin=27kΩ Parameter Min. Typ. Max. Unit Description N DIVIDER Operating Frequency Range 100 2400 MHz High Frequency Mode 100 1200 MHz Low Frequency Mode CLOCK BUFFER TCXOIN Input Sensitivity 0.4 2 Vpp * 12 Operating Frequency Range 10 19.2 or 18.432 25 MHz PHASE FREQUENCY DETECTOR(PFD) Phase Detector Frequency(FPFD) 25 MHz CHARGE PUMP(CP) CP Current Adjust 22 27 33 kΩ Connect to BIAS2 pin Maximum CP Current 2400 μA 32 levels by <Address0x0A, 0x0B> Minimum CP Current 75 μA ICP TRI-STATE Leak Current 1 nA 0.6 ≤ VCPO ≤ (CPVDD - 0.7) (VCPO:CP pin Voltage) Sink/Source Current Mismatch * 13 10 % VCPO = CPVDD/2 Ta = 25ºC ICP vs VCPO * 14 15 % 0.5 ≤ VCPO ≤ (CPVDD - 0.5) Ta = 25ºC NOISE CHARACTERISTICS Normalized Phase Noise -210 dBc/Hz * 15 Notes: * 12. In the case of using a TCXO other than 18.432MHz/19.2MHz, the cutoff frequency of the standard channel filter change. Also note that the output sampling rate of the ADC is related to the TCXO frequency. Refer to 13.8.2 Digital Filter Frequency Characteristics and 13.8.11 Output Sampling Rate for datails. * 13. Sink/Source Current Mismatch: [(|ISINK|-|ISOURCE|)/{(|ISINK|+|ISOURCE|)/2}]×100 [%] * 14. ICP vs VCPO: [{1/2*(|I1|-|I2|)}/{1/2*(|I1|+|I2|)}]×100 [%] * 15. It is calculated by the following formula with measuring in-band phase noise when PLL loop is locked. TCXOIN=19.2MHz, FPFD=19.2MHz (PNTOTAL = PNSYNTH – 10 Log FPFD – 20 Log N) PNTOTAL: Normalized Phase Noise, PNSYNTH: In-band Phase Noise |
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