RFM42 Datasheet, PDF (5/110 Pages) –

RFM42/43
Table 2. Synthesizer AC Electrical Characteristics²
Parameter
Symbol
Conditions
Min
Synthesizer
FSYNTH-LB
Low Band
240
Frequency Range
FSYNTH-HB
High Band
480
Synthesizer
FRES-LB
Low Band
—
Frequency
Resolution²
FRES-HB
High Band
—
Reference
fREF
Frequency
fcrystal /3
—
Reference
Frequency
Level²
Input
fREF_LV
0.7
When using reference frequency instead
of crystal. Measured peak-to-peak (VPP)
Synthesizer Settling
Time²
tLOCK
Measured from leaving Ready mode with —
XOSC running to any frequency
includ-ing VCO Calibration
Residual FM²
△FRMS ^{Integrated over ± 250 kHz bandwidth —}
(500 Hz lower bound of integration)
Phase Noise²
Lφ (fM) △F = 10 kHz
—
△F = 100 kHz
—
△F = 1 MHz
—
△F = 10 MHz
—
Notes:
1. All specification guaranteed by production test unless otherwise noted.
2. Guaranteed by qualification.
Typ
—
—
156.25
Max
480
930
—
312.5 —
10
—
— 1.6
200 —
2
4
–80 —
–90 —
–115 —
–130 —
Units
MHz
MHz
Hz
Hz
MHz
V
μs
kHzRMS
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
5
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