SI4431-A0-FM Silicon Laboratories Inc, SI4431-A0-FM Datasheet - Page 99

• 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 0Fh. ADC Configuration
Reset value = 00000000
Name
Type
Bit
6:4
3:2
1:0
Bit
7
adcstart/adc-
adcgain[1:0]
adcstart/
adcdone
adcsel[2:0]
adcref[1:0]
R/W
Name
D7
done
ADC Measurement Start Bit.
Reading this bit gives 1 if the ADC measurement cycle has been finished.
ADC Input Source Selection.
The internal 8-bit ADC input source can be selected as follows:
000:
001:
010:
011:
100:
101:
110:
111:
ADC Reference Voltage Selection.
The reference voltage of the internal 8-bit ADC can be selected as follows:
0X:
10:
11:
ADC Sensor Amplifier Gain Selection.
The full scale range of the internal 8-bit ADC in differential mode (see adcsel) can be set
as follows:
adcref[0] = 0:
FS = 0.014 x (adcgain[1:0] + 1) x VDD FS = 0.021 x (adcgain[1:0] + 1) x VDD
D6
Internal Temperature Sensor
GPIO0, single-ended
GPIO1, single-ended
GPIO2, single-ended
GPIO0(+) – GPIO1(–), differential
GPIO1(+) – GPIO2(–), differential
GPIO0(+) – GPIO2(–), differential
GND
bandgap voltage (1.2 V)
VDD / 3
VDD / 2
adcsel[2:0]
R/W
D5
adcref[0] = 1:
Preliminary Rev. 0.4
D4
Function
D3
adcref[1:0]
R/W
D2
D1
adcgain[1:0]
Si4431
R/W
D0
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