ADF7021-V Просмотр технического описания (PDF) - Analog Devices
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ADF7021-V Datasheet PDF : 60 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
–80
RF FREQ = 460MHz
–90
TCXO = 19.2MHz
–100
–110
–120
–130
ICP = 0.3mA
ICP = 0.9mA
–140
–150
–160
1
10
100
1k
10k
FREQUENCY OFFSET (kHz)
100k
Figure 11. Phase Noise Response at 460 MHz, VDD = 3 V
ADF7021-V
16
12
PA_BIAS = 11µA
8 PA_BIAS = 9µA
4
0
–4
PA_BIAS = 5µA
–8
PA_BIAS = 7µA
–12
–16
–20
–24
–28
–32
–36
–40
0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60
PA SETTING
Figure 14. RF Output Power vs. PA Setting
–60
RF FREQ = 868MHz
–70
TCXO = 19.2MHz
–80
–90
–100
–110
–120
ICP = 0.3mA
ICP = 0.9mA
ICP = 1.5mA
ICP = 2.1mA
–130
–140
–150
–160
1
10
100
1k
10k
FREQUENCY OFFSET (kHz)
Figure 12. Phase Noise Response at 868 MHz, VDD = 2.3 V
20
0
–20
–40
–60
–80
–100
300
800
1300
1800
2300
2800
FREQUENCY (MHz)
Figure 15. PA Output Harmonic Response with T-Stage LC Filter
20
DEMODULATION = GFSK
10 DATA RATE = 2.4kbps
fDEV = 1.2kHz
0 RF FREQ = 470MHz
IFBW = 4kHz
–10
–20
–30
–40
–50
–60
–70
–80
FCC PART 90
EMISSION MASK D
FREQUENCY OFFSET FROM CARRIER (Hz)
Figure 13. Output Spectrum in FCC Part 90 Emission Mask D
and GFSK Modes
10
DATA RATE = 9.6kbps
0
DATA = PRBS9
fDEV = 2.4kHz
RF FREQ = 868MHz
–10
–20
2FSK
–30
–40
GFSK
–50
–60
–70
–80
867.97
867.98
867.99 868.00 868.01
FREQUENCY (MHz)
868.02
868.03
Figure 16. Output Spectrum in 2FSK and GFSK Modes
Rev. 0 | Page 17 of 60
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