SI4455-C2A-GMR Datasheet, PDF (7/39 Pages) Silicon Laboratories – EASY-TO-USE, LOW-CURRENT OOK/(G)FSK SUB-GHZ TRANSCEIVER, TRANSMITTER, AND RECEIVER

Si4x55-C
Table 4. Transmitter AC Electrical Characteristics¹
Parameter
TX Frequency Range
Symbol
F_TX
Test Condition
Min Typ Max Unit
284 — 350 MHz
350 — 525 MHz
850 — 960 MHz
(G)FSK Data Rate
OOK Data Rate
Modulation Deviation
Range
Modulation Deviation
Resolution
Output Power Range³
TX RF Output Steps³
TX RF Output Level³
Variation vs. Temperature
TX RF Output Level
Variation vs. Frequency³
Transmit Modulation
Filtering
DR_FSK2
DR_OOK
f₉₆₀
f₅₂₅
f₃₅₀
F_RES-960
F_RES-525
F_RES-420
F_RES-350
P_TX
P_{RF_OUT}
P_{RF_TEMP}
P_{RF_FREQ}
B*T
850–960 MHz
350–525 MHz
284–350 MHz
850–1050 MHz
420–525 MHz
350–420 MHz
284–350 MHz
Measured at 434 MHz, 3.3 V,
Class E match
Using switched current match within
6 dB of max power
–40 to +85 C
Measured across 902–928 MHz
Gaussian Filtering Bandwith Time
Product
1.0 — 500 kbps
0.5 — 120 kbps
—
— 500 kHz
—
— 500 kHz
—
— 500 kHz
— 114.4 —
Hz
— 57.2 —
Hz
— 45.6 —
Hz
— 38.1 —
Hz
–20 — +13 dBm
— 0.25 —
dB
—
2.3 —
dB
— 0.6 —
dB
— 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.
Rev 1.0
7