RFM68CW
RFM68CW
2.4. Electrical Specifications
The table below gives the electrical specifications of the transmitter under the following conditions: Supply voltage = 3.3 V,
temperature = 25 °C, fXOSC = 26 MHz, fRF = 915 MHz, 2-FSK modulation with Fdev=+/-10 kHz, bit rate = 10 kbit/s and
output power = +10 dBm terminated in a matched 50 Ohm impedance, unless otherwise specified.
Table 4 Transmitter Specifications
Symbol
Description
Conditions
Min
Typ
Max
Unit
Current Consumption
IDDSL
Supply current in Sleep mode
-
0.5
1
µA
IDDT_315 Supply current in Transmit mode
at 315 MHz*
RFOP=+10dBm 50% OOK
-
-
-
11
15
9
-
-
-
mA
mA
mA
RFOP=+10dBm FSK
RFOP=0dBm FSK
IDDT_915 Supply current in Transmit mode
at 915 MHz*
RFOP=+10dBm FSK
-
-
17.5
10.5
-
-
mA
mA
RFOP=0dBm
FSK
RF and Baseband Specifications
FBAND
Band0,For 315MHz Module
Band0,For 433MHz Module
Band0,For 868MHz Module
Band1,For 915MHz Module
312
380
380
450
MHz
MHz
MHz
Operation Frequency Bands
860
902
10
870
928
200
MHz
kHz
FDA
Frequency deviation, FSK
Bit rate, FSK
-
-
BRF
Permissible Range
Permissible Range
0.5
0.5
-
100
10
-
kbps
kbps
dB
BRO
Bit rate, OOK
-
OOK_B
RFOP
OOK Modulation Depth
45
RF output power in 50 Ohms
in either frequency band
High Power Setting
Low Power Setting*
7
-3
10
0
-
-
dBm
dBm
RFOPFL
DRFOPV
RF output power flatness
From 315 to 380 MHz, 50 Ohms load
-
2
-
dB
Variation in RF output power with
supply voltage
2.5 V to 3.3 V
1.8 V to 3.7 V
-
-
-
-
3
7
dB
dB
PHN
Transmitter phase noise
At offset:
100 kHz
350 kHz
550 kHz
1.15 MHz
-
-
-
-
-82
-92
-96
-76
-81
-91
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
-103
-101
STEP_22
STEP_26
RF frequency step
RF frequency step
FXOSC = 24 MHz,for 315MHz module
-
-
1.46484
1.58691
-
-
kHz
kHz
FXOSC = 26MHz, for 433,868MHz
module
FXOSC = 26MHz, for 915MHz module
STEP_26
RF frequency step
3.17383
-
kHz
6
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