SX1223
Symbol
HRFOP
Description
Highest RF output power
Conditions
Highest programmable output
Min
8
Typ
10
Max
-
Unit
dBm
power
SRFOP
RF output power steps
RF output power step size
-
3
-
dB
(8 steps available)
XTAL
TS_OS
TS_OS_QS
Crystal oscillator frequency
Oscillator wake-up time
Oscillator wake-up time in
Recommended value: 16 MHz
From sleep mode
Quick start-up mode
-
-
-
-
0.8
0.15
40
2
-
MHz
ms
ms
quick start-up mode
IDDST_QS_typ=0.9mA
(XCO_quick_start,
XCO_high_I = 10)
TS_FS
Frequency synthesizer
From standby mode (oscillator
-
-
2
ms
wake-up time
running)
frequency at most 5 kHz away
from the target
TS_TR
Transmitter wake-up time
From FS mode (frequency
-
-
500
μs
synthesizer running)
TD_TX
Transmission duration in
Duration during which the
30
-
-
ms
mw2 mode
output signal is a proper FSK
signal and the carrier
frequency doesn’t drift by
more than 50 kHz from the
time when the transmitter has
reached its steady-state
(including PA)
TD_TXW
Transmission duration in
Same conditions as TD_TX,
15
-
-
ms
mw2 mode
but over the whole
temperature range
ACP
Power transmitted in the
At 10 dBm output power,
-
-16
dBm
150 kHz adjacent channel
modulated signal
Measured on a 150 kHz
bandwidth centered at 150
kHz from the carrier, ? f = 40
kHz
ACP_mw3
Power transmitted in the
At 10 dBm output power,
-
-23
-17
dBm
250 kHz adjacent channel
in mw3 modulation mode
modulated signal
Measured on a 250 kHz
bandwidth centered at 250
kHz from the carrier, ? f = 60
kHz
PHN
Phase noise of the output
At 10 dBm output power,
-
-83
-80
dBc/Hz
signal
unmodulated signal
Measured at 50 kHz from the
carrier in mw3 mode
CLKOUT
VIH
VIL
Output clock
Digital input level high
Digital input level low
On pin CLKOUT
% VDD
% VDD
-
75
-
1
-
-
-
-
25
MHz
%
%
? Semtech 2007
6
www.semtech.com
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