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SX1231
WIRELESS & SENSING PRODUCTS
DATASHEET
2.4. Chip Specification
The tables below give the electrical specifications of the transceiver under the following conditions: Supply voltage VBAT1=
VBAT2=VDD=3.3 V, temperature = 25 °C, FXOSC = 32 MHz, F RF = 915 MHz, Pout = +13dBm, 2-level FSK modulation
without pre-filtering, FDA = 5 kHz, Bit Rate = 4.8 kb/s and terminated in a matched 50 Ohm impedance, unless otherwise
specified.
Note
Unless otherwise specified, the performances in the other frequency bands are similar or better.
2.4.1. Power Consumption
Table 4
Power Consumption Specification
Symbol
IDDSL
IDDIDLE
IDDST
IDDFS
Description
Supply current in Sleep mode
Supply current in Idle mode
Supply current in Standby mode
Supply current in Synthesizer
Conditions
RC oscillator enabled
Crystal oscillator enabled
Min
-
-
-
-
Typ
0.1
1.2
1.25
9
Max
1
-
1.5
-
Unit
uA
uA
mA
mA
mode
IDDR
Supply current in Receive mode
-
16
-
mA
IDDT
Supply current in Transmit mode
with appropriate matching, stable
across VDD range
RFOP = +17 dBm, on PA_BOOST
RFOP = +13 dBm, on RFIO pin
RFOP = +10 dBm, on RFIO pin
RFOP = 0 dBm, on RFIO pin
RFOP = -1 dBm, on RFIO pin
-
-
-
-
-
95
45
33
20
16
-
-
-
-
-
mA
mA
mA
mA
mA
2.4.2. Frequency Synthesis
Table 5
Frequency Synthesizer Specification
Symbol
FR
Description
Synthesizer Frequency Range
Conditions
Programmable
Min
290
Typ
-
Max
340
Unit
MHz
424
862
-
-
510
1020
MHz
MHz
FXOSC
TS_OSC
TS_FS
Crystal oscillator frequency
Crystal oscillator wake-up time
Frequency synthesizer wake-up
See section 7.1
From Standby mode
-
-
-
32
250
80
-
500
150
MHz
us
us
time to PllLock signal
TS_HOP
FSTEP
Frequency synthesizer hop time
at most 10 kHz away from the
target
Frequency synthesizer step
FSTEP = FXOSC/2 19
200 kHz step
1 MHz step
5 MHz step
7 MHz step
12 MHz step
20 MHz step
25 MHz step
-
-
-
-
-
-
-
-
20
20
50
50
80
80
80
61.0
-
-
-
-
-
-
-
-
us
us
us
us
us
us
us
Hz
Rev. 7 - June 2013
Page 14
www.semtech.com
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