SI4438 Datasheet, PDF (7/44 Pages) Silicon Laboratories – Low active power consumption

Si4438
Table 4. Transmitter AC Electrical Characteristics¹
Parameter
TX Frequency
Range
(G)FSK Data Rate^2,3
OOK Data Rate^2,3
Modulation Deviation
Range
Modulation Deviation
Resolution⁴
Output Power Range⁵
TX RF Output Steps
TX RF Output Level
Variation vs. Temperature
TX RF Output Level
Variation vs. Frequency
Transmit Modulation
Filtering
Symbol
F_TX
DR_FSK
DR_OOK
f₅₂₅
F_RES-525
P_TX
P_{RF_OUT}
P_{RF_TEMP}
P_{RF_FREQ}
B*T
Test Condition
425–525 MHz
425–525 MHz
Using switched current match within
6 dB of max power
–40 to +85 C
Gaussian Filtering Bandwith Time
Product
Min Typ Max Unit
425 — 525 MHz
0.1 — 500 kbps
0.1 — 120 kbps
— 750 — kHz
— ^14.3 —
Hz
–20 — +20 dBm
—
0.1 —
dB
—
1
—
dB
—
0.5 —
dB
— 0.5 —
Notes:
1. All minimum and maximum values are guaranteed by production test unless otherwise stated. All typical values apply at
VDD = 3.3 V and 25 °C unless otherwise stated.
2. Guaranteed by design.
3. 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).
4. Default API setting for modulation deviation resolution is double the typical value specified.
5. Output power is dependent on matching components and board layout.
Rev 1.0
7