SI4455-B1A-FM Datasheet, PDF (7/40 Pages) Silicon Laboratories – EASY-TO-USE, LOW-CURRENT OOK/(G)FSK SUB-GHZ TRANSCEIVER

Si4455
Table 5. Transmitter AC Electrical Characteristics¹
Parameter
TX Frequency Range
Symbol
F_TX
Test Condition
Min Typ Max Unit
283 — 350 MHz
425 — 525 MHz
850 — 960 MHz
(G)FSK Data Rate²
OOK Data Rate²
Modulation Deviation
Range
Modulation Deviation
Resolution²
Output Power Range³
TX RF Output Steps²
TX RF Output Level²
Variation vs. Temperature
TX RF Output Level
Variation vs. Frequency²
Transmit Modulation
Filtering²
Spurious Emissions³
Harmonics³
DR_FSK
DR_OOK
f₉₆₀
f₅₂₅
f₃₅₀
F_RES-960
F_RES-525
F_RES-350
P_TX
P_{RF_OUT}
850–960 MHz
425–525 MHz
283–350 MHz
850–1050 MHz
425–525 MHz
283–350 MHz
Using switched current match within
6 dB of max power
P_{RF_TEMP}
–40 to +85 C
P_{RF_FREQ}
Measured across 902–928 MHz
B*T
P_OB-TX1
P_OB-TX2
P_2HARM
P_3HARM
Gaussian Filtering Bandwith Time
Product
P_OUT = +13 dBm,
Frequencies < 1 GHz
1–12.75 GHz, excluding harmonics
Using reference design TX matching
network and filter with max output
power. Harmonics reduce linearly with
output power.
1.0 — 500
0.5 — 120
—
— 500
—
— 500
—
— 500
— 114.4 —
— 57.2 —
— 38.1 —
–40 — +13
— 0.1 —
—
1
—
— 0.5 —
— 0.5 —
— –54 —
— –42 —
— –42 —
— –42 —
kbps
kbps
kHz
kHz
kHz
Hz
Hz
Hz
dBm
dB
dB
dB
dBm
dBm
dBm
dBm
Notes:
1. All specifications guaranteed by production test unless otherwise noted. Production test conditions and max limits are
listed in the "Production Test Conditions" section in "1.1. Definition of Test Conditions" on page 11.
2. Guaranteed by qualification. Qualification test conditions are listed in the "Qualification Test Conditions" section in "1.1.
Definition of Test Conditions" on page 11.
3. Output power and emissions specifications are dependent on transmit frequency, matching components, and board
layout.
Rev 1.1
7