ADRF6821 datasheet(18/61 Pages) AD

18 / 61 page

ADRF6821

Data Sheet

Rev. A | Page 18 of 61

–50

–130

–120

–80

–100

–110

–70

–90

–60

–170

–150

–140

–160

450

920

1860

1390

2330

2800

LO FREQUENCY (MHz)

+105°C

+27°C

–40°C

10kHz

100kHz

1MHz

10MHz

Figure 37. Closed-Loop LO Phase Noise vs. LO Frequency for Various

Offset Frequencies and for Various Temperatures

1.0

0.2

0.3

0.7

0.5

0.4

0.8

0.6

0.9

0.1

450

920

1860

1390

2330

2800

LO FREQUENCY (MHz)

+105°C

+27°C

–40°C

Figure 38. 100 Hz to 10 MHz Integrated Phase Noise with Spurs vs.

LO Frequency

–50

–80

–100

–70

–90

–60

–110

450

920

1860

1390

2330

2800

LO FREQUENCY (MHz)

+105°C

+27°C

–40°C

Figure 39. Reference Spurs, 1 × fPFD Offset vs. LO Frequency

–50

–80

–100

–70

–90

–60

–110

450

920

1860

1390

2330

2800

LO FREQUENCY (MHz)

+105°C

+27°C

–40°C

Figure 40. Reference Spurs, 2 × fPFD Offset vs. LO Frequency

–50

–80

–100

–70

–90

–60

–110

450

920

1860

1390

2330

2800

LO FREQUENCY (MHz)

3 ×

fPFD

4 ×

fPFD

5 ×

fPFD

6 ×

fPFD

7 ×

fPFD

Figure 41. Reference Spurs, 3 × fPFD and Higher Offset vs. LO Frequency

–30

–50

–20

–40

–10

–60

1000

1360

2080

1720

2440

2800

LO FREQUENCY (MHz)

HD2

HD3

Figure 42. LO HD2 and HD3 vs. LO Frequency

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