ADRF6702 datasheet(13/36 Pages) AD

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ADRF6703

Rev. 0 | Page 13 of 36

–120

–110

–100

–90

–80

–70

2100

2200

2300

2400

2500

2150

2250

2350

2450

2550 2600

LO FREQUENCY (MHz)

2 × PFD FREQUENCY

4 × PFD FREQUENCY

TA = –40°C

TA = +25°C

TA = +85°C

Figure 22. PLL Reference Spurs vs. LO Frequency (2× PFD and 4× PFD) at

Modulator Output

–120

–110

–100

–90

–80

–70

–115

–105

–95

–85

–75

2100

2200

2300

2400

2500

2150

2250

2350

2450

2550 2600

LO FREQUENCY (MHz)

1 × PFD FREQUENCY

3 × PFD FREQUENCY

TA = –40°C

TA = +25°C

TA = +85°C

0.5 × PFD FREQUENCY

Figure 23. PLL Reference Spurs vs. LO Frequency (0.5× PFD, 1× PFD,

and 3× PFD) at Modulator Output

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

2.6

2.8

2100 2150 2200 2250 2300 2350 2400 2450 2500 2550 2600

LO FREQUENCY (MHz)

TA = –40°C

TA = +25°C

TA = +85°C

Figure 24. VTUNE vs. LO Frequency and Temperature

–120

–110

–100

–90

–80

–70

–115

–105

–95

–85

–75

2100

2200

2300

2400

2500

2150

2250

2350

2450

2550 2600

LO FREQUENCY (MHz)

2 × PFD FREQUENCY

4 × PFD FREQUENCY

TA = –40°C

TA = +25°C

TA = +85°C

Figure 25. PLL Reference Spurs vs. LO Frequency (2× PFD and 4× PFD) at LO

Output

–120

–110

–100

–90

–80

–70

–115

–105

–95

–85

–75

2100

2200

2300

2400

2500

2150

2250

2350

2450

2550 2600

LO FREQUENCY (MHz)

3 × PFD FREQUENCY

0.5 ×, 2 × PFD FREQUENCY

TA = –40°C

TA = +25°C

TA = +85°C

Figure 26. PLL Reference Spurs vs. LO Frequency (0.5× PFD, 2× PFD, and

3× PFD) at LO Output

–180

–160

–140

–120

–100

–80

–60

–40

–20

10k

100k

10M

FREQUENCY (Hz)

LO = 2594.13MHz

LO = 2306.26MHz

LO = 2138.95MHz

Figure 27. Open-Loop VCO Phase Noise at 2138.95 MHz, 2306.26 MHz, and

2594.13 MHz

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