Datasheet

Data Sheet ADF4158
Rev. E | Page 9 of 36
TYPICAL PERFORMANCE CHARACTERISTICS
–160
–140
–120
–100
–80
–60
–40
1k
10k
100k 1M
10M
PHASE NOISE (dBc/Hz)
FREQUENCY OFFSET (Hz)
08728-035
Figure 6. Phase Noise at 5805 MHz, PFD = 32 MHz, Loop Bandwidth = 100 kHz
5.78
5.79
5.80
5.81
5.82
5.83
5.84
5.85
5.86
–0.025 –0.015
–0.005
0.005
0.015 0.025
FREQUENCY (GHz)
TIME (s)
08728-036
Figure 7. Triangular Waveform, PFD = 32 MHz, INT = 181, FRAC = 0,
DEV Offset = 4, DEV Word = 20972, Step Word = 200, CLK
2
Divider = 10,
CLK
1
Divider = 125
5.75
5.77
5.79
5.81
5.83
5.85
5.87
–0.010 –0.005 0 0.005 0.010
FREQUENCY (GHz)
TIME (s)
08728-037
Figure 8. Sawtooth Waveform, PFD = 32 MHz, INT = 181, FRAC = 0,
DEV Offset = 4, DEV Word = 20972, Step Word = 200, CLK
2
Divider = 10,
CLK
1
Divider = 125
5.76
5.77
5.78
5.79
5.80
5.81
5.82
5.83
5.84
5.85
5.86
5.87
FREQUENCY
(GHz)
TIME (s)
–0.010
–0.005
0
0.005
0.010
08728-039
Figure 9. Delay Between Ramps for Sawtooth Waveform, PFD = 32 MHz,
INT = 181, FRAC = 0, DEV Offset = 4, DEV Word = 20972, Step Word = 200,
CLK
2
Divider = 10, CLK
1
Divider = 125, DEL Start Word = 1025
5.76
5.77
5.78
5.79
5.80
5.81
5.82
5.83
5.84
5.85
5.86
0 0.005
0.010
TIME (s)
FREQUENCY (GHz)
0.015 0.020
NO DELAY
DELAY
08728-040
Figure 10. Delayed Start of Triangular Burst, PFD = 32 MHz, INT = 181,
FRAC = 0, DEV Offset = 4, DEV Word = 20972, Step Word = 200,
CLK
2
Divider = 10, CLK
1
Divider = 125, DEL Start Word = 1000
5.790
5.792
5.794
5.796
5.798
5.800
5.802
5.804
5.806
5.808
5.810
–0.010
0.010
–0.005
0.005
0
FREQUENCY (GHz)
TIME (s)
08728-041
Figure 11. Dual Ramp Rate Waveform, PFD = 32 MHz, INT = 181, FRAC = 0,
Ramp 1: DEV Offset = 3, DEV Word = 16777, Step Word = 100,
Ramp 2: DEV Offset = 3, DEV Word = 20792, Step Word = 80