RFM31 Datasheet, PDF (5/137 Pages) –

RFM31
Table 2. Synthesizer AC Electrical Characteristics¹
Parameter
Symbol
Conditions
Min
Synthesizer Frequency FSYNTH-LB Low Band
240
Range
FSYNTH-HB High Band
480
Synthesizer Frequency FRES-LB Low Band
—
Resolution²
FRES-HB High Band
—
Reference Frequency
fREF
fcrystal /3
—
Reference Frequency
Input Level²
fREF_LV
When using reference frequency 0.7
instead of crystal. Measured
peak-to-peak (VPP)
Synthesizer
Time²
Settling
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
312.5
10
—
200
2
–80
–90
–115
–130
Max
480
960
—
—
—
1.6
—
4
—
—
—
—
Units
MHz
MHz
Hz
Hz
MHz
V
μs
kHzRMS
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
5
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