SI4421-A1-FT Silicon Laboratories Inc, SI4421-A1-FT Datasheet - Page 37

• Manufacturer Part Number: SI4421-A1-FT
• Description: IC TXRX FSK 915MHZ 3.8V 16-TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4421-A1-FT

• Package / Case: 16-TSSOP
• Frequency: 433MHz, 868MHz, 915MHz
• Data Rate - Maximum: 256kbps
• Modulation Or Protocol: FSK
• Power - Output: 7dbm
• Sensitivity: -110dBm
• Voltage - Supply: 2.2 V ~ 3.6 V
• Current - Receiving: 15mA
• Current - Transmitting: 28mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Number Of Receivers: 2
• Number Of Transmitters: 2
• Wireless Frequency: 433 MHz to 915 MHz
• Interface Type: SPI
• Output Power: 5 dBm to 7 dBm
• Operating Supply Voltage: 2.2 V to 3.8 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 25 mA
• Minimum Operating Temperature: - 40 C
• Modulation: FSK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1631-5

BER Curves in 433 MHz Band:
BER Curves in 868 MHz Band:
The table below shows the optimal receiver baseband bandwidth (BW) and transmitter deviation frequency (δf
different data-rates supposing no transmit receive offset frequency. If TX/RX offset (for example due to crystal tolerances) have to be
taken into account, increase the BW accordingly.
f
BW=67 kHz
FSK
1.2 kbps
=45 kHz
f
BW=67 kHz
FSK
2.4 kbps
10
10
10
10
10
10
10
10
10
10
10
10
1
1
=45 kHz
-1
-2
-3
-4
-5
-6
-1
-2
-3
-4
-5
-6
-120
-115
f
BW=67 kHz
-115
FSK
-110
4.8 kbps
=45kHz
-110
-105
f
BW=67 kHz
FSK
9.6 kbps
=45 kHz
-105
-100
f
BW=67 kHz
19.2 kbps
FSK
-100
-95
=45 kHz
-95
-90
f
BW=134 kHz
38.4 kbps
FSK
=90 kHz
-90
-85
f
BW=134 kHz
57.6 kbps
FSK
=90 kHz
1.2k
2.4k
4.8k
9.6k
1.2k
2.4k
4.8k
9.6k
19.2k
38.4k
57.6k
19.2k
38.4k
57.6k
115.2k
115.2k
FSK
f
BW=200 kHz
) settings for
115.2 kbps
FSK
Si4421
=120 kHz
37