ADRF6750 Analog Devices, Inc., ADRF6750 Datasheet - Page 12

• Manufacturer Part Number: ADRF6750
• Description: 950 Mhz To 1575 Mhz Quadrature Modulator With Integrated Fractional-n Pll And Vco
• Manufacturer: Analog Devices, Inc.

ADRF6750
Figure 19. 2 × LO Off Isolation vs. Attenuation, LO Frequency, Supply,
Figure 18. LO Off Isolation vs. Attenuation, LO Frequency, Supply,
–100
–110
–120
–130
–140
–100
–110
–120
Figure 17. Output IP3 vs. LO Frequency at Nominal Conditions
30
29
28
27
26
25
24
23
22
21
20
–60
–70
–80
–90
–20
–30
–40
–50
–60
–70
–80
–90
ATTENUATION = 21dB
ATTENUATION = 0dB
OUTPUT IP3 INTERCEPT POINT (dBm)
ATTENUATION = 47dB
ATTENUATION = 0dB
ATTENUATION = 47dB
and Temperature
and Temperature
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
ATTENUATION
= 21dB
Rev. 0 | Page 12 of 40
Figure 20. Second-Order and Third-Order Harmonic Distortion vs.
Figure 21. Noise Floor at 15 MHz Offset Frequency Distribution at
–140
–145
–150
–155
–160
–165
–170
–100
–110
–120
100
–40
–50
–60
–70
–80
–90
90
80
70
60
50
40
30
20
10
Figure 22. Noise Floor at 0 dB Attenuation vs. Output Power
0
–180 –176 –172 –168 –164 –160 –156 –152 –148 –144 –140
Worst-Case Conditions and Different Attenuation Settings
(dBm/Hz) NOISE FLOOR AT 15MHz OFFSET FREQUENCY (dBc/Hz)
–25
LOWER SECOND HARMONIC (
–20
LO Frequency, Supply, and Temperature
UPPER SECOND HARMONIC (
UPPER THIRD HARMONIC (
ATTENUATION =
47dB (dBm/Hz)
–15
at Nominal Conditions
LO FREQUENCY (MHz)
OUTPUT POWER (dBm)
LOWER THIRD HARMONIC (
ATTENUATION =
21dB (dBm/Hz)
–10
ATTENUATION =
0dB (dBc/Hz)
ATTENUATION =
f
21dB (dBc/Hz)
LO
–5
– 2 ×
f
LO
f
LO
+ 2 ×
f
BB
0
+ 3 ×
)
f
BB
f
f
)
LO
BB
– 3 ×
)
5
f
BB
)
10