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SI4455-C2A-GMR Datasheet(PDF) 7 Page - Silicon Laboratories

Part # SI4455-C2A-GMR
Description  EASY-TO-USE, LOW-CURRENT OOK/(G)FSK SUB-GHZ TRANSCEIVER, TRANSMITTER, AND RECEIVER
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Manufacturer  SILABS [Silicon Laboratories]
Direct Link  http://www.silabs.com
Logo SILABS - Silicon Laboratories

SI4455-C2A-GMR Datasheet(HTML) 7 Page - Silicon Laboratories

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Si4x55-C
Rev 1.0
7
Table 4. Transmitter AC Electrical Characteristics1
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
TX Frequency Range
FTX
284
350
MHz
350
525
MHz
850
960
MHz
(G)FSK Data Rate
DRFSK2
1.0
500
kbps
OOK Data Rate
DROOK
0.5
120
kbps
Modulation Deviation
Range
f960
850–960 MHz
500
kHz
f525
350–525 MHz
500
kHz
f350
284–350 MHz
500
kHz
Modulation Deviation
Resolution
FRES-960
850–1050 MHz
—114.4
Hz
FRES-525
420–525 MHz
—57.2
Hz
FRES-420
350–420 MHz
—45.6
Hz
FRES-350
284–350 MHz
—38.1
Hz
Output Power Range3
PTX
Measured at 434 MHz, 3.3 V,
Class E match
–20
+13
dBm
TX RF Output Steps3
PRF_OUT
Using switched current match within
6 dB of max power
—0.25
dB
TX RF Output Level3
Variation vs. Temperature
PRF_TEMP
–40 to +85
C—
2.3
dB
TX RF Output Level
Variation vs. Frequency3
PRF_FREQ
Measured across 902–928 MHz
0.6
dB
Transmit Modulation
Filtering
B*T
Gaussian Filtering Bandwith Time
Product
—0.5
Notes:
1.
All minimum and maximum values are guaranteed across the recommended operating conditions of supply voltage and
from –40 to +85 °C unless otherwise stated. All typical values apply at VDD = 3.3 V and 25 °C unless otherwise stated.
2.
The maximum data rate is dependent on the XTAL frequency and is calculated as per the formula: Maximum Symbol
Rate = Fxtal/60, where Fxtal is the XTAL frequency (typically 30 MHz).
3.
Conducted measurements based on RF evaluation board. Output power and emissions specifications are dependent on
transmit frequency, matching components, and board layout.


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