ADF4251 Dual Fractional-N/Interger-N Frequency ... - Analog Devices

More documents

Recommendations

Info

ADF4251 V DD 1 V DD 2 V DD 3 DV DD V P 1 V P 2 R SET ADF4251 REFERENCE 4-BIT R REF 2 IN COUNTER DOUBLER PHASE FREQUENCY DETECTOR CHARGE PUMP CE CP RF MUXOUT OUTPUT MUX LOCK DETECT CLK DATA LE FROM REFIN 24-BIT DATA REGISTER FRACTIONAL N RF DIVIDER INTEGER N IF DIVIDER RF IN A RF IN B IF IN B IF IN A 2 DOUBLER 15-BIT R COUNTER PHASE FREQUENCY DETECTOR CHARGE PUMP CP IF A GND 1 A GND 2 D GND CP GND 1 CP GND 2 Figure 2. Detailed Functional Block Diagram –6– REV. 0
Typical Performance Characteristics–ADF4251 OUTPUT POWER – dB 0 –10 –20 –30 –40 –50 –60 –70 V DD = 3V, V P = 5V I CP = 1.875mA PFD FREQUENCY = 10MHz CHANNEL STEP = 200kHz LOOP BANDWIDTH = 20kHz FRACTION = 59/100 RBW = 10Hz REFERENCE LEVEL = – 4.2dBm OUTPUT POWER – dB 0 –10 –20 –30 –40 –50 –60 –70 V DD = 3V, V P = 5V I CP = 1.875mA PFD FREQUENCY = 10MHz CHANNEL STEP = 200kHz LOOP BANDWIDTH = 20kHz FRACTION = 59/100 RBW = 1kHz –50dBc@ 100kHz REFERENCE LEVEL = – 4.2dBm –80 –99.19dBc/Hz –80 –90 –90 –100 –2kHz –1kHz 1.7518GHz 1kHz 2kHz FREQUENCY –100 –400kHz –200kHz 1.7518GHz 200kHz 400kHz FREQUENCY TPC 1. Phase Noise Plot, Lowest Noise Mode, 1.7518 GHz RF OUT , 10 MHz PFD Frequency, 200 kHz Channel Step Resolution TPC 4. Spurious Plot, Lowest Noise Mode, 1.7518 GHz RF OUT , 10 MHz PFD Frequency, 200 kHz Channel Step Resolution OUTPUT POWER – dB 0 –10 –20 –30 –40 –50 –60 –70 V DD = 3V, V P = 5V I CP = 1.875mA PFD FREQUENCY = 10MHz CHANNEL STEP = 200kHz LOOP BANDWIDTH = 20kHz FRACTION = 59/100 RBW = 10Hz REFERENCE LEVEL = – 4.2dBm –90.36dBc/Hz OUTPUT POWER – dB 0 –10 –20 –30 –40 –50 –60 –70 V DD = 3V, V P = 5V I CP = 1.875mA PFD FREQUENCY = 10MHz CHANNEL STEP = 200kHz LOOP BANDWIDTH = 20kHz FRACTION = 59/100 RBW = 1kHz –51dBc@ 100kHz REFERENCE LEVEL = – 4.2dBm –80 –80 –90 –90 –100 –2kHz –1kHz 1.7518GHz 1kHz 2kHz FREQUENCY –100 –400kHz –200kHz 1.7518GHz 200kHz 400kHz FREQUENCY TPC 2. Phase Noise Plot, Low Noise and Spur Mode, 1.7518 GHz RF OUT , 10 MHz PFD Frequency, 200 kHz Channel Step Resolution TPC 5. Spurious Plot, Low Noise and Spur Mode, 1.7518 GHz RF OUT , 10 MHz PFD Frequency, 200 kHz Channel Step Resolution OUTPUT POWER – dB 0 –10 –20 –30 –40 –50 –60 –70 V DD = 3V, V P = 5V I CP = 1.875mA PFD FREQUENCY = 10MHz CHANNEL STEP = 200kHz LOOP BANDWIDTH = 20kHz FRACTION = 59/100 RBW = 10Hz REFERENCE LEVEL = – 4.2dBm –85.86dBc/Hz OUTPUT POWER – dB 0 –10 –20 –30 –40 –50 –60 –70 V DD = 3V, V P = 5V I CP = 1.875mA PFD FREQUENCY = 10MHz CHANNEL STEP = 200kHz LOOP BANDWIDTH = 20kHz FRACTION = 59/100 RBW = 1kHz –72dBc@ 100kHz REFERENCE LEVEL = – 4.2dBm –80 –80 –90 –90 –100 –2kHz –1kHz 1.7518GHz 1kHz 2kHz FREQUENCY –100 –400kHz –200kHz 1.7518GHz 200kHz 400kHz FREQUENCY TPC 3. Phase Noise Plot, Lowest Spur Mode, 1.7518 GHz RF OUT , 10 MHz PFD Frequency, 200 kHz Channel Step Resolution TPC 6. Spurious Plot, Lowest Spur Mode, 1.7518 GHz RF OUT , 10 MHz PFD Frequency, 200 kHz Channel Step Resolution TPCs 1–12 attained using EVAL-ADF4252EB1 Evaluation Board; measurements from HP8562E spectrum analyzer. REV. 0 –7–
Page 1 and 2: Dual Fractional-N/Integer-N Frequen
Page 3 and 4: TIMING CHARACTERISTICS * Limit at T
Page 5: ADF4251 PIN FUNCTION DESCRIPTIONS M
Page 9 and 10: ADF4251 -70 -20 -75 -30 -80 -40 PHA
Page 11 and 12: ADF4251 CIRCUIT DESCRIPTION Referen
Page 13 and 14: ADF4251 Table II. Register Summary
Page 15 and 16: ADF4251 Table IV. RF R Divider Regi
Page 17 and 18: ADF4251 Table VI. Master Register M
Page 19 and 20: ADF4251 Table VIII. IF R Divider Re
Page 21 and 22: ADF4251 RF N DIVIDER REGISTER (Addr
Page 23 and 24: ADF4251 When a power-down is activa
Page 25 and 26: IF Side Not In Use If the IF side i
Page 27 and 28: ADF4251 OUTLINE DIMENSIONS 24-Lead

ADF4251 Dual Fractional-N/Interger-N Frequency ... - Analog Devices

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?