EVAL-ADF7021DBZ5 Datasheet, PDF (19/64 Pages) Analog Devices – High Performance Narrow-Band Transceiver IC

Data Sheet
REF 15dBm
SAMP LOG 10dB/
ATTEN 25dB
DR = 9.6kbps
DATA = PRS9
f_DEV = 2.4kHz
RF FREQ = 869.5MHz
VAVG 100
V1 V2
S3 FC
3FSK
RC3FSK
CENTER 869.5MHz
RES BW 300Hz
VBW 300Hz
SPAN 50Hz
SWEEP2.226s (401pts)
Figure 17. Output Spectrum in 3FSK and Raised Cosine 3FSK Modes
10
RAMP RATE:
CW ONLY
256 CODES/BIT
128 CODES/BIT
0 _{64 CODES/BIT}
32 CODES/BIT
–10
TRACE = MAX HOLD
PA ON/OFF RATE = 3Hz
PA ON/OFF CYCLES = 10000
V_DD = 3.0V
–20
–30
–40
–50
–60
–100
–50
0
50
100
FREQUENCY OFFSET (kHz)
Figure 18. Output Spectrum in Maximum Hold
for Various PA Ramp Rate Options
0
–1
–2
3.0V, +25°C
–3
DATA RATE = 9.6kbps
f_DEV = 4kHz
RF FREQ = 868MHz
IF BW = 25kHz
–4
3.6V, –40°C
–5
2.3V, +85°C
–6
–7
–8
–122 –120 –118 –116 –114 –112 –110 –108 –106 –104
RF INPUT POWER (dBm)
Figure 19. 2FSK Sensitivity vs. VDD and Temperature, fRF = 868 MHz
ADF7021
0
DATA RATE = 1kbps
f_DEV = 1kHz
–1
RF FREQ = 135MHz
IF BW = 12.5kHz
–2
–3
3.0V, +25°C
–4
2.3V, +85°C
–5
3.6V, –40°C
–6
–7
–8
–130 –128 –126 –124 –122 –120 –118 –116 –114 –112 –110 –108
RF INPUT POWER (dBm)
Figure 20. 2FSK Sensitivity vs. VDD and Temperature, fRF = 135 MHz
0
3FSK MODULATION
DATA RATE = 9.6kbps
–1
f_DEV = 2.4kHz
MOD INDEX = 0.5
RF FREQ = 440 MHz
–2
–3
–4
–5 _{2.3V +25°C}
3.0V +25°C
3.6V +25°C
–6 _{2.3V –40°C}
3.0V –40°C
3.6V –40°C
–7 _{2.3V +85°C}
3.0V +85°C
3.6V +85°C
–8
–120
–115
–110
–105
–100
–95
RF INPUT POWER (dBm)
Figure 21. 3FSK Sensitivity vs. VDD and Temperature, fRF = 440 MHz
0
DATA RATE = 19.6kbps
SYMBOL RATE = 9.8ksym/s
–1
f_DEV (inner) = 2.4kHz
MOD INDEX = 0.5
RF FREQ = 420MHz
–2
IF BW = 12.5kHz
–3
–4
–5 _{2.3V +25°C}
3.0V +25°C
3.6V +25°C
–6 _{2.3V –40°C}
3.0V –40°C
3.6V –40°C
–7 _{2.3V +85°C}
3.0V +85°C
3.6V +85°C
–8
–120
–115
–110
–105
–100
–95
RF INPUT POWER (dBm)
Figure 22. 4FSK Sensitivity vs. VDD and Temperature, fRF = 420 MHz
Rev. B | Page 19 of 64