SI4021-A1-FT Silicon Laboratories Inc, SI4021-A1-FT Datasheet - Page 28

• Manufacturer Part Number: SI4021-A1-FT
• Description: IC TX FSK 915MHZ 5.4V 16-TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4021-A1-FT

• Package / Case: 16-TSSOP
• Frequency: 433MHz, 868MHz, 915MHz
• Modulation Or Protocol: FSK, OOK
• Data Rate - Maximum: 512kbps
• Power - Output: 8dBm
• Current - Transmitting: 24mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.2 V ~ 5.4 V
• Operating Temperature: -40°C ~ 85°C
• Operating Frequency: 433 MHz to 915 MHz
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 2.2 V to 5.4 V
• Supply Current: 1.5 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Applications: -
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1622-5

MATCHING NETWORK FOR A 50 OHM SINGLE ENDED OUTPUT
Matching Network Schematic
Note 1:
Note 2:
Note 3:
and VSS pins
433 MHz
868 MHz
915 MHz
Si4021
1 mm thick board
1.5 mm thick board
C4 must be connected parallel to the supply decoupling capacitors (10nF + 2.2µF recommended) as close as possible to the VDD
L1 [nH]
5.1
4.3
16
L2 [nH]
47
24
24
L3 [nH]
390
100
100
L4 [nH]
5.1
4.3
16
(Note 1)
C1 [pF]
3.3
2
2
(Note 2)
C1 [pF]
3.3
1.5
1.8
C2 [pF]
6.0
2.2
2.2
C3 [pF]
2.7
1.2
1.2
(Note 3)
Si4021
C4 [pF]
220
47
33
28