Datasheet

Data Sheet ADF4154
Rev. C | Page 7 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
Loop bandwidth = 20 kHz; reference = 250 MHz; VC O = Vari-L Company, Inc., VCO190-1750T; evaluation board = EVAL-ADF4154EB1;
measurements taken with the Agilent E5500 phase noise measurement system.
04833-004
PHASE NOISE (dBc/Hz)
–30
–60
–80
–140
–130
–120
–110
–150
–160
–170
–90
–100
–70
–50
–40
20kHz LOOP BW, LOW NOISE MODE
RF = 1.7202MHz, PFD = 25MHz, N = 68,
FRAC = 101, MOD = 125, I
CP
= 625µA, DSB
INTEGRATED PHASE ERROR = 0.23° rms
SIRENZA 1750T VCO
1k 10k 1M 10M 100M
100k
FREQUENCY (Hz)
Figure 5. Single-Sideband Phase Noise Plot (Lowest Noise Mode)
PHASE NOISE (dBc/Hz)
–30
–60
–80
–140
–130
–120
–110
–150
–160
–170
–90
–100
–70
–50
–40
1k 10k 1M 10M 100M
100k
04833-005
FREQUENCY (Hz)
20kHz LOOP BW, LOW NOISEAND SPUR MODE
RF = 1.7202MHz, PFD = 25MHz, N = 68,
FRAC = 101, MOD = 125, I
CP
= 625µA, DSB
INTEGRATED PHASE ERROR = 0.33° rms
SIRENZA 1750T VCO
Figure 6. Single-Sideband Phase Noise Plot
(Low Noise Mode and Spur Mode)
04833-006
PHASE NOISE (dBc/Hz)
–30
–60
–80
–140
–130
–120
–110
–150
–160
–170
–90
–100
–70
–50
–40
1k 10k 1M 10M 100M
100k
FREQUENCY (Hz)
20kHz LOOP BW, LOW SPUR MODE
RF = 1.7202MHz, PFD = 25MHz, N = 68,
FRAC = 101, MOD = 125, I
CP
= 625µA, DSB
INTEGRATED PHASE ERROR = 0.36° rms
SIRENZA 1750T VCO
Figure 7. Single-Sideband Phase Noise Plot (Lowest Spur Mode)
PHASE NOISE (dBc/Hz)
PHASE DETECTOR FREQUENCY (kHz)
–130
–140
–150
–160
–170
100 1000 10000 100000
04833-010
Figure 8. PFD Noise Floor vs. PFD Frequency (Lowest Noise Mode)
FREQUENCY (GHz)
AMPLITUDE (dBm)
5
0
–5
–10
–20
–15
–25
–30
–35
0 0.5 1.0 1.5 4.03.53.02.52.0 4.5
P = 4/5
P = 8/9
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Figure 9. RF Input Sensitivity
V
CP
(V)
6
0
–6
I
CP
(mA)
4
2
–2
–4
–5
–3
–1
1
3
5
0 1 2 3
4 5
04833-012
Figure 10. Charge Pump Output Characteristics