SI4431-A0-FM Silicon Laboratories Inc, SI4431-A0-FM Datasheet - Page 149

• Manufacturer Part Number: SI4431-A0-FM
• Description: IC TXRX ISM 930MHZ 3.6V 20-QFN
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4431-A0-FM

• Package / Case: 20-QFN
• Mfg Application Notes: Transitioning SI4430/31 to Rev B
• Frequency: 240MHz ~ 930MHz
• Data Rate - Maximum: 128kbps
• Modulation Or Protocol: FSK, GFSK, OOK
• Power - Output: 13dBm
• Sensitivity: -118dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 18.5mA
• 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: 1
• Wireless Frequency: 240 MHz to 930 MHz
• Output Power: 13 dBm
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 28 mA
• Minimum Operating Temperature: - 40 C
• Modulation: FSK, GFSK, OOK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Memory Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 336-1633-5

Register 72h. Frequency Deviation
Register 73h. Frequency Offset 1
Reset value = 00100000
Note: It's recommended to use modulation index of 1 or higher (maximum allowable modulation index is 32). The modulation
Reset value = 00000000
Reading from this register will give the AFC correction last results, not this register value.
Name
Name
Type
Type
Bit
Bit
7:0
7:0
Bit
Bit
index is defined by 2F
modulation index is defined by F
Name
fd[7:0]
Name
fo[7:0]
D7
D7
Frequency Deviation Setting.
See formula above.
Frequency Offset Setting.
The frequency offset can be calculated as Offset = 156.25 Hz x (hbsel + 1) x fo[7:0].
fo[9:0] is a twos complement value. Reading from this register will give the AFC correc-
tion last results, not this register value.
D6
D6
N
/F
R
were F
D
/R
D
B
D5
D5
is the deviation and R
.
Preliminary Rev. 0.4
D4
D4
fd[7:0]
fo[7:0]
R/W
R/W
B
is the data rate. When Manchester coding is enabled the
Function
Function
D3
D3
D2
D2
D1
D1
Si4431
D0
D0
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