ADF7021-V Просмотр технического описания (PDF) - Analog Devices
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производитель
ADF7021-V Datasheet PDF : 60 Pages
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0.6
DATA RATE = 1.2kbps
fDEV = 2.4Hz
RF FREQ = 868MHz
0.5
IFBW = 9kHz
–40°C, 2.3V
0.4
–40°C, 3V
–40°C, 3.6V
+25°C, 2.3V
+25°C, 3V
0.3
+25°C, 3.6V
+85°C, 2.3V
+85°C, 3V
0.2
+85°C, 3.6V
0.1
0
–130
–125
–120
–115
RF INPUT POWER (dBm)
–110
–105
Figure 23. 2FSK Sensitivity vs. VDD and Temperature at 868 MHz
0.6
0.5
0.4
0.3
0.2
0.1
0
–130
DATA RATE = 1.2kbps
fDEV = 2.4Hz
RF FREQ = 460MHz
IFBW = 9kHz
–40°C, 2.3V
–40°C, 3V
–40°C, 3.6V
+25°C, 2.3V
+25°C, 3V
+25°C, 3.6V
+85°C, 2.3V
+85°C, 3V
+85°C, 3.6V
–125
–120
–115
RF INPUT POWER (dBm)
–110
–105
Figure 24. 2FSK Sensitivity vs. VDD and Temperature at 460 MHz
100
90
80
70
60
50
40
30
20
10
0
–10
–20 –15 –10 –5
0
5
10
15
20
FREQUENCY OFFSET (MHz)
Figure 25. Wideband Interference Rejection (Modulated Carrier Is Swept 20 MHz
Either Side of an 868 MHz Modulated GFSK 2.4 kHz/4.8 kbps Wanted Signal at the
Sensitivity Point (−106.5 dBm); the Power Level of the Blocker Is Adjusted to
Give a BER of 10−2; Interferer Is a GFSK PRBS15 4.8 kHz/2.4 kHz Signal)
ADF7021-V
–20
RSSI
READBACK LEVEL
–40
–60
–80
–100
–120
ACTUAL RF INPUT LEVEL
–140
–122.5 –112.5 –102.5 –92.5 –82.5 –72.5 –62.5 –52.5 –42.5
RF INPUT POWER (dBm)
Figure 26. Digital RSSI Readback Linearity
80
70
60
50
40
30
20
CALIBRATED
10
UNCALIBRATED
0
–10
BLOCKER FREQUENCY (MHz)
Figure 27. Image Rejection, Uncalibrated vs. Calibrated
2.5
0
+90°C
–2.5
–5.0
–7.5
–10.0
–12.5
–15.0
–17.5
–20.0
–22.5
–25.0
–27.5
–30.0
–32.5
–35.0
–37.5
90 92 94
–40°C
96 98 100 102 104 106 108 110
IF FREQUENCY (kHz)
Figure 28. Variation of IF Filter Response with Temperature
(IF_FILTER_BW = 9 kHz, Temperature Range Is −40°C to +90°C in 10° Steps)
Rev. 0 | Page 19 of 60
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