RFM12B_15 Datasheet, PDF (11/41 Pages) List of Unclassifed Manufacturers – Universal ISM Band FSK Transceiver

RFM12B
AC Characteristics (Transmitter)
Symbol
I _OUT
P _{max_50}
Parameter
Open collector output DC current
Max. output power delivered to 50
Ohm load over a suitable matching
network (Note 4)
P _{max_ant}
Max. EIRP with suitable selected
PCB antenna (Note 6)
P _out
Typical output power
P _sp
Spurious emission
l f-f_sp l > 1 MHz
P _harm
Harmonic suppression
C_o
Output capacitance (set by the
automatic antenna tuning circuit)
Q_o
Quality factor of the output
capacitance
L _out
BR _TX
BRA _TX
df _fsk
Output phase noise
FSK bit rate
FSK bit rate
FSK frequency deviation
Conditions/Notes
Programmable
In 433 MHz band
In 868 MHz / 915 MHz bands
In 433 MHz band with monopole antenna
with matching network (Note 4)
In 868 MHz / 915 MHz bands (Note 5)
Selectable in 2.5 dB steps (Note 7)
At max power 50 Ohm load (Note 4)
With PCB antenna (Note 5)
At max power 50 Ohm load (Note 4)
With PCB antenna (Note 5)
In 433 MHz band
In 868 MHz / 915 MHz bands
In 433 MHz band
In 868 MHz / 915 MHz bands
100 kHz from carrier, in 868 MHz band
1 MHz from carrier, in 868 MHz band
Via internal TX data register
TX data connected to the FSK input
Programmable in 15 kHz steps
Min
Typ
0.5
7
5
7
7
P_max -17.5
2
2.6
2.1
2.7
13
15
8
10
-80
-103
15
AC Characteristics (Turn-on/Turnaround timings)
Max Units
6
mA
dBm
dBm
P _max
-55
-60
-35
-42
3.2
3.3
17
12
dBm
dBc
dBc
pF
dBc/Hz
172
kbps
256
kbps
240
kHz
Symbol
t _sx
Parameter
Crystal oscillator startup time
T_{tx_XTAL_ON} Transmitter turn-on time
T_{rx_XTAL_ON} Receiver turn-on time
T_{tx_rx_SYNT_ON} Transmitter – Receiver turnover time
T_{rx_tx_SYNT_ON} Receiver – Transmitter turnover time
Conditions/Notes
Default capacitance bank setting, crystal
ESR < 50 Ohm (Note 9). Crystal load
capacitance = 16 pF.
Synthesizer off, crystal oscillator on with
10 MHz step
Synthesizer off, crystal oscillator on with
10 MHz step
Synthesizer and crystal oscillator on
during TX/RX change with 10 MHz step
Synthesizer and crystal oscillator on
during RX/TX change with 10 MHz step
AC Characteristics (Others)
Min
Typ
Max Units
2
7
ms
250
µs
250
µs
150
µs
150
µs
Symbol
C _xl
t _POR
Parameter
Crystal load capacitance,
see crystal selection guide
Internal POR timeout
t _PBt
Wake-up timer clock accuracy
C _inD
Digital input capacitance
t_r, t_f
Digital output rise/fall time
Conditions/Notes
Programmable in 0.5 pF steps, tolerance
± 10%
After V_dd has reached 90% of final value
(Note 8)
Crystal oscillator must be enabled to
ensure proper calibration at the start up.
(Note 9)
15 pF pure capacitive load
Min
Typ
Max Units
8.5
16
pF
100
ms
± 10
%
2
pF
10
ns
11
Tel: [phone] Fax: [phone] E-mail: [e-mail] http://www.hoperf.com