RFM12 Datasheet, PDF (4/10 Pages) –

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