SI4431-A0-FM Silicon Laboratories Inc, SI4431-A0-FM Datasheet - Page 144

• 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 69h. AGC Override 1
Register 6Ah. AGC Override 2
Si4431
Reset value = 00100000
Reset value = 10011101
144
Name
Name
Type
Type
Bit
Bit
7:6
3:0
5:2
1:0
Bit
Bit
5
4
7
6
lnacomp[3:0] LNA Gain Compensation.
agcovpm
pgath[1:0]
Reserved
agcovpm
pga[3:0]
agcslow
lnagain
R/W
Name
agcen
Name
D7
D7
Reserved
R
agcslow
Reserved.
Automatic Gain Control Enable.
When this bit is set then the result of the control can be read out from bits [4:0], otherwise
the gain can be controlled manually by writing into bits [4:0].
LNA Gain Select.
0 – min. gain = 5 dB
PGA Gain Override Value.
000:
001:
010:
...
101:
If set, AGC will ignore the Preamble Detection.
AGC Slow Gain Increase Enable.
When this bit is set then the AGC loop will slow down the gain increase in the receiver.
The speed of the gain reduction is not affected.
This bit is used for smoothing RSSI value when LNA gain is switched.
Window Comparator Reference Voltage Adjust in the PGA.
R/W
D6
D6
0 dB
3 dB
6 dB
24 dB max.
agcen
R/W
D5
D5
Preliminary Rev. 0.4
lnagain
1 – max. gain = 25 dB
R/W
D4
D4
lnacomp[3:0]
R/W
Function
Function
D3
D3
D2
D2
pga[3:0]
R/W
D1
D1
pgath[1:0]
R/W
D0
D0