ADF4154 Analog Devices, ADF4154 Datasheet - Page 8

• Manufacturer Part Number: ADF4154
• Description: Fractional-n Frequency Synthesizer
• Manufacturer: Analog Devices

ADF4154
–130
–140
–150
–160
–170
Figure 11. PFD Noise Floor vs. PFD Frequency (Lowest Noise Mode)
–10
–15
–20
–25
–30
–35
–5
–1
–2
–3
–4
–5
–6
100
5
0
6
5
4
3
2
1
0
0
0
Figure 13. Charge Pump Output Characteristics
0.5
PHASE DETECTOR FREQUENCY (kHz)
1
1.0
Figure 12. RF Input Sensitivity
1000
1.5
FREQUENCY (GHz)
2
2.0
V
CP
(V)
2.5
3
P = 4/5
10000
3.0
P = 8/9
3.5
4
4.0
100000
4.5
5
Rev. 0 | Page 8 of 20
B) Lock Time with the PLL in Normal Mode (Non Fast-lock), Low Spur Mode, a
1649.7 MHz to 1686.8 MHz Frequency Jump. Final Loop Bandwidth = 60 kHz
Figure 16. A) Lock Time in Fast-lock Mode. Fast Counter = 150, Low Spur
1.700
1.696
1.692
1.688
1.684
1.680
1.676
1.672
1.668
1.664
1.660
1.656
1.652
1.648
1.644
1.640
–100
–105
–110
–100
–102
–104
–80
–85
–90
–95
–90
–92
–94
–96
–98
–60
0
0
Mode: a 1649.7 MHz to 1686.8 MHz Frequency Jump.
A
10
–40
Figure 15. Phase Noise vs. Temperature
5
20
Final Loop Bandwidth = 60 kHz
B
Figure 14. Phase Noise vs. R
–20
30
10
40
TEMPERATURE(°C)
0
R
SET
15
TIME (µs)
50
VALUE (kΩ)
20
60
20
65
40
SET
25
75
60
85
30
80
95
100
100
3
5