RFM23
Table 4. Transmitter AC Electrical Characteristics1
Parameter
Symbol
FSYNTH-LB
FSYNTH-HB
DRFSK
Conditions
Low Band
High Band
Min
240
480
1
Typ
—
Max Units
480
930
128
MHz
MHz
kbps
1
TX Frequency Range
—
2
—
FSK Modulation Data Rate
OOK Modulation Data
DROOK
Δf
1.2
±0.625
—
—
40
±320
—
kbps
kHz
kHz
2
Rate
Production tests maximum
limit of 320 kHz
1
Modulation Deviation
Modulation Deviation
Resolution
0.625
ΔfRES
Power control by txpow[2:0] Register
Production test at txpow[2:0] = 111
Tested at 915 MHz
1
–8
—
+13
dBm
Output Power Range
PTX
Max Output Power
Tested at 315-915 MHz
+11
—
+13
3
—
—
—
dBm
dB
PTX_max
△PRF_OUT
PRF_V
2
controlled by txpow[2:0] Register
Measured from VDD=3.6 V to
VDD=1.8 V
TX RF Output Steps
TX RF Output Level
—
2
dB
2
Variation vs. Voltage
2
TX RF Output Level
–40 to +85℃
—
—
—
2
1
—
—
—
dB
dB
△PRF_TEMP
△PRF_FREQ
B*T
Variation vs. Temperature
TX RF Output Level
Measured across any one
frequency band
2
Variation vs. Frequency
Transmit Modulation
Gaussian Filtering Bandwith Time
Product
0.5
2
Filtering
POUT = 11 dBm,
—
—
—
—
–54
–54
dBm
dBm
POB-TX1
POB-TX2
2
Frequencies <1 GHz
1–12.75 GHz, excluding harmonics
Spurious Emissions
Notes:
1. All specification guaranteed by production test unless otherwise noted.
2. Guaranteed by qualification.
7
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