Typical Performance Characteristics - Analog Devices ADF7021-V Manual

TYPICAL PERFORMANCE CHARACTERISTICS

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