SI4431-B1-FMR Silicon Laboratories Inc, SI4431-B1-FMR Datasheet - Page 9

• Manufacturer Part Number: SI4431-B1-FMR
• Description: IC TXRX 240-930MHZ -8-13DB 20QFN
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4431-B1-FMR

• Mfg Application Notes: Transitioning SI4430/31 to Rev B
• Frequency: 240MHz ~ 930MHz
• Data Rate - Maximum: 256kbps
• Modulation Or Protocol: FSK, GFSK, OOK
• Applications: General Purpose
• Power - Output: 13dBm
• Sensitivity: -121dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 18.5mA
• Current - Transmitting: 30mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-VQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -

Table 3. Receiver AC Electrical Characteristics
RX Frequency
Range—Si4431/32
RX Frequency
Range—Si4430
RX Sensitivity
RX Channel Bandwidth
BER Variation vs Power
Level
LNA Input Impedance
(Unmatched—measured
differentially across RX
input pins)
RSSI Resolution
1-Ch Offset Selectivity
2-Ch Offset Selectivity
 3-Ch Offset Selectivity
Blocking at 1 MHz Offset
Blocking at 4 MHz Offset
Blocking at 8 MHz Offset
Image Rejection
Spurious Emissions
Notes:
1. All specification guaranteed by production test unless otherwise noted. Production test conditions and max limits are listed
2. Receive sensitivity at multiples of 30 MHz may be degraded. If channels with a multiple of 30 MHz are required it is
3. Guaranteed by qualification. Qualification test conditions are listed in the "Production Test Conditions" section on page 14.
3
in the "Production Test Conditions" section on page 14.
recommended to shift the crystal frequency. Contact Silicon Labs Applications Support for recommendations.
Parameter
2
3
3
3
3
3
3
3
3
3
3
1M
4M
8M
P
RES
P
P
Symbol
P
P
P
C/I
C/I
C/I
R
P
RX_OOK
Im
RX_RES
OB_RX1
RX_100
RX_125
RX_40
F
F
BW
IN-RX
RX_2
BLOCK
BLOCK
BLOCK
1-CH
2-CH
3-CH
RX
RX
REJ
RSSI
lated with 40 kbps F = 20 kHz GFSK with
BER < 0.1%. Interferer and desired modu-
Desired Ref Signal 3 dB above sensitivity,
Desired Ref Signal 3 dB above sensitivity.
40 kbps F = 20 kHz GFSK with BT = 0.5
Interferer and desired modulated with
BT = 0.5, channel spacing = 150 kHz
Rejection at the image frequency.
(4.8 kbps, 350 kHz BW, OOK)
(40 kbps, 400 kHz BW, OOK)
(100 kbps, GFSK, BT = 0.5,
(125 kbps, GFSK, BT = 0.5,
(40 kbps, GFSK, BT = 0.5,
Up to +5 dBm Input Level
(2 kbps, GFSK, BT = 0.5,
Measured at RX pins
f = 62.5 kHz)
f = 20 kHz)
f = 50 kHz)
(BER < 0.1%)
(BER < 0.1%)
(BER < 0.1%)
(BER < 0.1%)
(BER < 0.1%)
(BER < 0.1%)
f = 5 kHz)
1
Rev 1.1
Conditions
IF=937 kHz
915 MHz
868 MHz
433 MHz
315 MHz
3
3
3
3
3
Si4430/31/32-B1
Min
240
900
2.6
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
107–137j
89–110j
51–60j
54–63j
–121
–108
–104
–101
–102
–110
±0.5
Typ
–31
–35
–40
–52
–56
–63
–30
—
—
—
—
0
Max
930
960
620
–54
0.1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Units
MHz
MHz
dBm
dBm
dBm
dBm
dBm
dBm
ppm
dBm
kHz
dB
dB
dB
dB
dB
dB
dB
dB

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