EVAL-ADF7021DBZ5 Datasheet, PDF (18/64 Pages) Analog Devices – High Performance Narrow-Band Transceiver IC

ADF7021
TYPICAL PERFORMANCE CHARACTERISTICS
–70
–80
–90
–100
I_CP = 0.8mA
RF FREQ = 900MHz
V_DD = 2.3V
TEMPERATURE = 25°C
VCO BIAS = 8
VCO ADJUST = 3
I_CP = 1.4mA
–110
–120
I_CP = 2.2mA
–130
–140
–150
1
10
100
1000
10000
FREQUENCY OFFSET (MHz)
Figure 11. Phase Noise Response at 900 MHz, VDD = 2.3 V
16
12
8
4
0
–4
–8
–12
–16
–20
–24
–28
–32
–36
–40
0
PA BIAS = 11µA
PA BIAS = 9µA
PA BIAS = 5µA
PA BIAS = 7µA
4 8 12 16 20 24 28 32 36 40 44 48 52 56 60
PA SETTING
Figure 12. RF Output Power vs. PA Setting
1R
RF FREQ = 440MHz
OUTPUT POWER = 10dBm
FILTER = T-STAGE LC FILTER
MARKER Δ = 52.2dB
Data Sheet
GFSK
DR = 9.6kbps
DATA = PRBS9
f_DEV = 2.4kHz
RF FREQ = 869.5MHz
FSK
CENTER 869.5 25MHz
SPAN 50kHz
RES BW 300Hz
VBW 300Hz SWEEP 2.118s (601pts)
Figure 14. Output Spectrum in 2FSK and GFSK Modes
DR = 9.6kbps
DATA = PRBS9
f_DEV = 2.4kHz
RF FREQ = 869.5MHz
2FSK
RC2FSK
CENTER 869.5 25MHz
RES BW 300Hz
SPAN 50kHz
VBW 300Hz SWEEP 2.118s (601pts)
Figure 15. Output Spectrum in 2FSK and Raised Cosine 2FSK Modes
SR = 4.8ksym/s
DATA = PRBS9
f_DEV = 2.4kHz
RF FREQ = 869.5MHz
1
4FSK
START 300MHz
RES BW 100Hz
STOP 3.5GHz
VBW 100Hz SWEEP 385.8ms (601pts)
Figure 13. PA Output Harmonic Response with T-Stage LC Filter
RC4FSK
CENTER 869.493 8MHz
SPAN 100kHz
RES BW 300Hz
VBW 300Hz SWEEP 4.237s (601pts)
Figure 16. Output Spectrum in 4FSK and Raised Cosine 4FSK Modes
Rev. B | Page 18 of 64