SI4431-A0-FM Silicon Laboratories Inc, SI4431-A0-FM Datasheet - Page 136

• 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 5Ah. VCO Current Trimming
Register 5Bh. VCO Calibration/Override
Si4431
Reset value = 00000011
Reset value = 00000000
136
Name
Name
Type
Type
Bit
5:2
1:0
6:0
Bit
Bit
Bit
7
6
7
txcurboosten
vcocalov/vcdone
calov/vcdone
txcurboosten If this is Set, then vcocur = 11 during TX Mode and VCO CAL followed by TX.
vcocorr[3:0]
vcocur[1:0]
vcocal[6:0]
vcocorrov
R/W
Name
Name
D7
vco-
R/W
D7
vcocorrov
VCO Current Correction Override.
VCO Current Correction Value.
VCO Current Trim Value.
VCO Calibration Override/Done.
When vcocalov = 0 the internal VCO calibration results may be viewed by reading the
vcocal register. When vcocalov = 1 the VCO results may be overridden externally
through the SPI by writing to the vcocal register. Reading this bit gives 1 if the calibration
process has been finished.
VCO Calibration Results.
R/W
D6
D6
D5
D5
Preliminary Rev. 0.4
D4
D4
vcocorr[3:0]
R/W
Function
Function
vcocal[6:0]
D3
R/W
D3
D2
D2
D1
D1
vcocur[1:0]
R/W
D0
D0