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