Datasheet

ADF4350
Rev. A | Page 10 of 32
0
–20
–40
–60
–80
–100
–120
–140
–160
PHASE NOISE (dBc/Hz)
1k 10k
FREQUENCY (Hz)
100k 1M
07325-034
10M
Figure 10. Integer-N Phase Noise and Spur Performance. GSM900 Band,
RF
OUT
= 904 MHz, REF
IN
= 100 MHz, PFD = 800 kHz, Output Divide-by-4
Selected; Loop-Filter Bandwidth = 16 kHz, Channel Spacing = 200 kHz.
0
–20
–40
–60
–80
–100
–120
–140
–160
PHASE NOISE (dBc/Hz)
1k 10k
FREQUENCY (Hz)
100k 1M
07325-035
10M
Figure 11. Fractional-N Spur Performance; Low Noise Mode. W-CDMA Band,
RF
OUT
= 2113.5 MHz, REF
IN
= 100 MHz, PFD = 25 MHz, Output Divide-by-2
Selected; Loop Filter Bandwidth = 40 kHz, Channel Spacing = 200 kHz.
0
–20
–40
–60
–80
–100
–120
–140
–160
PHASE NOISE (dBc/Hz)
1k 10k
FREQUENCY (Hz)
100k 1M
07325-036
10M
Figure 12. Fractional-N Spur Performance. Low Spur Mode, W-CDMA Band
RF
OUT
= 2113.5 MHz, REF
IN
= 100 MHz, PFD = 25 MHz, Output Divide-by-2
Selected; Loop Filter Bandwidth = 40 kHz, Channel Spacing = 200 kHz
0
–20
–40
–60
–80
–100
–120
–140
–160
PHASE NOISE (dBc/Hz)
1k 10k
FREQUENCY (Hz)
100k 1M
07325-037
10M
Figure 13. Fractional-N Spur Performance. Low Noise Mode, RF
OUT
=
2.591 GHz, REF
IN
= 105 MHz, PFD = 17.5 MHz, Output Divide-by-1 Selected;
Loop Filter Bandwidth = 20 kHz, Channel Spacing = 100 kHz.
0
–20
–40
–60
–80
–100
–120
–140
–160
PHASE NOISE (dBc/Hz)
1k 10k
FREQUENCY (Hz)
100k 1M
07325-038
10M
Figure 14. Fractional-N Spur Performance. Low Spur Mode RF
OUT
=
2.591 GHz, REF
IN
= 105 MHz, PFD = 17.5 MHz, Output Divide-by-1 Selected.
Loop Filter Bandwidth = 20 kHz, Channel Spacing = 100 kHz (Note That
Fractional Spurs Are Removed and Only the Integer Boundary Spur Remains
in Low Spur Mode).
2.95
2.96
2.97
2.98
2.99
3.00
3.01
3.02
FREQUENCY (GHz)
CSR OFF
CSR ON
0 100 200 300
TIME (µs)
400 500 600
07325-039
Figure 15. Lock Time for 100 MHz Jump from 3070 MHz to 2970 MHz with
CSR On and Of f, PFD = 25 MHz, I
CP
= 313 μA, Loop Filter Bandwidth = 20 kHz