Data Sheet

ADF4154

Rev. C | Page 7 of 24

TYPICAL PERFORMANCE CHARACTERISTICS

Loop bandwidth = 20 kHz; reference = 250 MHz; VCO = Vari-L Company, Inc., VCO190-1750T; evaluation board = EVAL-ADF4154EB1;

measurements taken with the Agilent E5500 phase noise measurement system.

–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,

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)

–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 NOISE AND SPUR MODE

RF = 1.7202MHz, PFD = 25MHz, N = 68,

INTEGRATED PHASE ERROR = 0.33° rms

SIRENZA 1750T VCO

Figure 6. Single-Sideband Phase Noise Plot

(Low Noise Mode and Spur Mode)

–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,

INTEGRATED PHASE ERROR = 0.36° rms

SIRENZA 1750T VCO

Figure 7. Single-Sideband Phase Noise Plot (Lowest Spur Mode)

PHASE DETECTOR FREQUENCY (kHz)

–130

–140

–150

–160

–170

100

1000

10000

100000

Figure 8. PFD Noise Floor vs. PFD Frequency (Lowest Noise Mode)

FREQUENCY (GHz)

5

0

–5

–10

–20

–15

–25

–30

–35

0

0.5

1.0

1.5

4.0

3.5

3.0

2.5

2.0

4.5

P = 4/5

P = 8/9

Figure 9. RF Input Sensitivity

6

0

–6

4

2

–2

–4

–5

–3

–1

1

3

5

0

1

2

3

4

5

Figure 10. Charge Pump Output Characteristics