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XE1205
Symbol
Description
Conditions
Min
Typ
Max
Unit
ratio at 25 kHz
ratio at 50 kHz
ACR_25
ACR_50
BR
Receiver adjacent channel rejection funw = f LO + 25 kHz single tone
Pw=-110 dBm, mode A
BW (SSB) = 10 kHz
BW (SSB) = 8 kHz (2)
Receiver adjacent channel rejection funw = f LO + 50 kHz single tone
Pw=-110 dBm, mode A
Bit rate Programmable
-
-
-
1.2
20
30
40
-
-
-
-
304.7 (4)
dBc
dBc
dBc
kbit/s
RFOP
RF output power
Programmable
RFOP1
RFOP2
RFOP3
RFOP4
-3
+2
+7
+12
0
+5
+10
+15
-
-
-
-
dBm
dBm
dBm
dBm
(measured at 25 kHz offset)
ACP
Transmitter adjacent channel power Pre-filter enabled
(RFOP3 mode)
Measurement conditions as
-
-
-37
dBm
defined by EN 300 220-1 V1.3.1
FR
Synthesizer frequency range
Programmable
433
-
435
MHz
863
902
-
-
870
928
MHz
MHz
TS_SRE
TS_STR
TS_FS
Receiver wake-up time
Transmitter wake-up time
Frequency synthesizer wake-up
Quartz oscillator enabled
Quartz oscillator enabled
Quartz oscillator enabled
-
-
-
700
250
200
850
350
250
us
us
us
time
TS_RE
TS_TR
Receiver wake-up time
Transmitter wake-up time
Frequency synthesizer enabled
Frequency synthesizer enabled
-
-
500
100
600
150
us
us
TS_RFSW Receiver recovery time when
switching between 2 channels
Between 2 channels at 1 MHz
from each other
-
700
us
TS_TFSW Transmitter recovery time when
switching between 2 channels
Between 2 channels at 1 MHz
from each other
-
150
250
us
3 overtone
TS_RSSI
TS_OS
TS_FEI
XTAL
FSTEP
VTHR
SPR
VIH
VIL
VOH
VOL
RSSI wake-up time
Quartz oscillator wake-up time
FEI wake-up time
Quartz oscillator frequency
Frequency synthesizer step
Equivalent input thresholds
of the RSSI
Spurious emission in receiver mode
Digital input level high
Digital input level low
Digital output level high
Digital output level low
Receiver enabled
Fundamental
rd
Receiver enabled
Fundamental or third harmonic
Exact step is XTAL / 77’824
Mode A (5) , low range:VTHR1
VTHR2
VTHR3
Mode A, high range:VTHR1
VTHR2
VTHR3
(3)
% VDD
% VDD
% VDD
% VDD
-
-
-
-
-
-
-
-
-
-
-
-
-
75
-
75
-
-
1
7
2/BR
39
500
-110
-105
-100
-95
-90
-85
-65
-
-
-
-
1.5
2
-
-
-
-
-
-
-
-
-
-
-
-
25
-
25
ms
ms
ms
ms
MHz
Hz
dBm
dBm
dBm
dBm
dBm
dBm
dBm
%
%
%
%
Table 4: Electrical Specifications
(1)
(2)
(3)
(4)
(5)
Additional bandwidths can be selected with special settings described in section 7.2.8.
With additional bandwidth configuration register settings as described in sections 5.2.6 and 7.2.8.
SPR strongly depends on the design of the application board and the choice of the external components. Values down to -70 dBm can be
achieved with careful design.
304.7 kbit/s achievable with additional register settings as described in section 6. The 304.7kpbs max bit rate is guaranteed by validation.
The max bit rate guaranteed by production test is 152.3 kbit/s
RSSI also available in mode B with higher thresholds as described in section 5.2.3.4
? Semtech 2008
6
www.semtech.com
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