EVAL-ADF7021-NDBEZ Analog Devices Inc, EVAL-ADF7021-NDBEZ Datasheet - Page 20

• Manufacturer Part Number: EVAL-ADF7021-NDBEZ
• Description: 426MHz To 429 MHz, External L
• Manufacturer: Analog Devices Inc
• Type: Transceiver, FSKr

Specifications of EVAL-ADF7021-NDBEZ

• Frequency: 420MHz ~ 440MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: ADF7021-N
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q5835434A

ADF7021-N
–10
–100
–120
–140
–10
70
60
50
40
30
20
10
429.80 429.85 429.90 429.95 430.00 430.05 430.10 430.15 430.20
–20
–40
–60
–80
90
80
70
60
50
40
30
20
10
0
–122.5 –112.5 –102.5 –92.5
0
–22
Figure 25. Image Rejection, Uncalibrated vs. Calibrated
UNCALIBRATED
–18
Figure 23. Wideband Interference Rejection
Figure 24. Digital RSSI Readback Linearity
CALIBRATED
–14
–10
FREQUENCY OFFSET (MHz)
RF FREQUENCY (MHz)
ACTUAL RF INPUT LEVEL
–6
RF INPUT (dBm)
RF FREQ = 430MHz
EXTERNAL VCO INDUCTOR
DATA RATE = 9.6kbps
TEMPERATURE = 25°C, V
–2 0 2
–82.5
RF FREQ = 868MHz
BLOCKER = 2FSK,
V
TEMPERATURE = 25°C
DD
f
WANTED SIGNAL
(10dB ABOVE SENSITIVITY
POINT) = 2FSK,
DATA RATE = 9.8kbps
DATA RATE = 9.8kbps
–72.5
f
DEV
DEV
= 3.0V
READBACK LEVEL
6
= 4kHz,
= 4kHz,
–62.5
10
RSSI
–52.5 –42.5
14
DD
= 3.0V
18
22
Rev. 0 | Page 20 of 64
(IF_FILTER_BW = 9 kHz, Temperature Range is −40°C to +90°C in 10° Steps)
–10.0
–12.5
–15.0
–17.5
–20.0
–22.5
–25.0
–27.5
–30.0
–32.5
–35.0
–37.5
–100
–102
–104
–106
–108
–110
–112
–114
–116
–118
Figure 28. 3FSK Receiver Sensitivity Using Viterbi Detection and
–2.5
–5.0
–7.5
Figure 27. 2FSK Sensitivity vs. Modulation Index vs. Correlator
–1
–2
–3
–4
–5
–6
–7
2.5
0
–120 –118 –116 –114 –112 –110 –108 –106 –104 –102 –100
0
90
Figure 26. Variation of IF Filter Response with Temperature
0
3FSK MODULATION
V
DATA RATE = 9.6kbps
f
RF FREQ = 868MHz
IF BW = 18.75kHz
DEV
DD
+90°C
DISCRIMINATOR BANDWIDTH =
1× FSK FREQUENCY DEVIATION
VITERBI DETECTION
= 3.0V, TEMP = 25°C
92
= 2.4kHz
0.2
94
Discriminator Bandwidth
96
Threshold Detection
0.4
INPUT POWER (dBm)
MODULATION INDEX
IF FREQUENCY (kHz)
–40°C
DISCRIMINATOR BANDWIDTH =
2× FSK FREQUENCY DEVIATION
98
THRESHOLD DETECTION
0.6
100
RF FREQ = 860MHz
2FSK MODULATION
DATA RATE = 9.6kbps
IF BW = 25kHz
V
TEMPERATURE = 25°C
DD
102
= 3.0V
0.8
104
106
1.0
108
1.2
110