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ADRF6821 Datasheet(PDF) 14 Page - Analog Devices

Part # ADRF6821
Description  450 MHz to 2800 MHz, DPD RFIC with Integrated Fractional-N PLL and VCO
PDF  61 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADRF6821 Datasheet(HTML) 14 Page - Analog Devices

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ADRF6821
Data Sheet
Rev. A | Page 14 of 61
110
100
60
30
80
90
50
70
40
20
600
1040
1480
1920
2360
2800
LO FREQUENCY (MHz)
MIXER_GAIN_PEAK = 0
MIXER_GAIN_PEAK = 3
DIFFERENCE
PRODUCT
SUM
PRODUCT
Figure 16. Output IP2 vs. LO Frequency for Various MIXER_GAIN_PEAK
(Register 0x003A, Bits[1:0]) Settings
110
100
60
30
80
90
50
70
40
20
600
1040
1480
1920
2360
2800
LO FREQUENCY (MHz)
DSA = 0dB
DSA = 15dB
DIFFERENCE
PRODUCT
SUM
PRODUCT
Figure 17. Output IP2 vs. LO Frequency, Measured on −10 dBm for Each
Tone at the IF Output for Various DSA Settings
90
80
40
10
60
70
30
50
20
0
0
100
200
300
400
500
IF FREQUENCY (MHz)
LO = 1000MHz
LO = 2000MHz
LO = 2800MHz
DIFFERENCE
PRODUCT
SUM
PRODUCT
Figure 18. Output IP2 vs. IF Frequency, RF Sweep with Fixed LO, Measured
on −10 dBm for Each Tone at the IF Output
–10
–90
–80
–40
–60
–70
–30
–50
–20
–110
–100
0
100
200
300
400
500
IF FREQUENCY (MHz)
+105°C
+27°C
–40°C
Figure 19. HD2 vs IF Frequency, LO at 2000 MHz and POUT = −7 dBm
–10
–90
–80
–40
–60
–70
–30
–50
–20
–110
–100
0
50
150
100
200
250
300
350
IF FREQUENCY (MHz)
+105°C
+27°C
–40°C
Figure 20. HD3 vs. IF Frequency, LO at 2000 MHz and POUT = −7 dBm
–10
–90
–80
–40
–60
–70
–30
–50
–20
–110
–100
0
100
200
300
400
500
IF FREQUENCY (MHz)
LO = 1000MHz
LO = 2000MHz
LO = 2800MHz
HD3
HD2
Figure 21. HD2 and HD3 vs. IF Frequency for Various LO Frequencies



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