Manual

RFM12
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AC characteristic
symbol parameter remark min typical max Unit
f
ref
PLL frequency 8 10 12 MHz
f
LO
frequency
(10MHz crystal
used)
315 MHz band,2.5KHz step
433 MHz band,2.5KHz step
868 MHz band,5KHz step
915 MHz band,7.5KHz step
310.24
430.24
860.48
900.72
319.75
439.75
879.51
929.27
MHz
f
LO
frequency
(8MHZ crystal
used)
315 MHz band,2.5KHz step
433 MHz band,2.5KHz step
868 MHz band,5KHz step
915 MHz band,7.5KHz step
248.19
344.19
688.38
720.57
255.80
351.80
703.61
743.41
MHz
f
LO
frequency
(12MHZ crystal
used)
315 MHz band,2.5KHz step
433 MHz band,2.5KHz step
868 MHz band,5KHz step
915 MHz band,7.5KHz step
372.28
516.28
1032.5
1080.8
383.71
527.71
1055.4
1115.1
MHz
BW Receiver
bandwidth
1
2
3
4
5
6
60
120
180
240
300
360
67
134
200
270
350
400
75
150
225
300
375
450
KHz
t
lock
PLL lock time After 10MHz step hopping,
frequency error <10 kHz
20 us
BR Data rate With internal digital
demodulator
0.6 115.2 kbps
BR
A
Data rate With external RC filter 256 kbps
P
min
sensitivity BW=134KHz,BR=1.2kbps -102 -96 dBm
AFC
range
AFC working range df
FSK
FSK deviation in the
received signal
0.8*
df
FSK
RS
A
RSSI accuracy ±5 dB
RS
R
RSSI range 46 dB
C
ARSSI
ARSSI filter 1 nF
RS
STEP
RSSI
programmable step
6 dB
RS
RESP
DRSSI response
time
RSSI output high after
valid , CARRSI=5nF
500 us
AC characteristic(Transmitter)
symbol parameter remark min typical max Unit
P
max
Available output power with
optimal antenna impedance
315/433MHZ band
868/915MHZ band
8
0
dbm
P
out
Typical output power Selectable in 3 dB
steps
P
max
-21 P
max
dbm