4320-DKDB2 Silicon Laboratories Inc, 4320-DKDB2 Datasheet - Page 32

• Manufacturer Part Number: 4320-DKDB2
• Description: KIT DEV TEST EZRADIO SI4320 RX
• Manufacturer: Silicon Laboratories Inc

Specifications of 4320-DKDB2

• Accessory Type: Test Card, Receiver, 434MHz
• Wireless Frequency: 434 MHz
• Interface Type: SPI
• Modulation: FSK, OOK
• For Use With/related Products: EZRadio®
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Input impedance
Measured input return loss on the demo boards with suggested matching circuit
-10
-15
-20
-25
-30
-35
-40
-5
0
-10
-15
-20
-25
-30
-35
-40
800
-5
0
200
868 and 915 MHz Matching to 50 Ohm
820
220
315 MHz Matching to 50 Ohm
840
240
860
260
880
280
magdB(S11)
freq. [MHz]
magdB(S11)
freq. [MHz]
900
g
300
920
320
940
340
360
960
380
980
400
1000
AC
-10
-15
-20
-25
-30
-35
-40
50ohm
-5
0
Frequency [MHz]
200
220
433 MHz Matching to 50 Ohm
915
868
433
315
240
Input Matching circuit
C1
C1
260
280
magdB(S11)
freq. [MHz]
L1 [nH]
300
L1
15
15
36
56
320
340
C1 [pF]
3
3
7
9
360
to LNA
to LNA
LNA 250ohm
380
400
Si4320
32