SX1239 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
Manufacturer
SX1239 Datasheet PDF : 73 Pages
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SX1239
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
2.4. Chip Specification
The tables below give the electrical specifications of the receiver under the following conditions: Supply voltage VBAT1=
VBAT2=VDD=3.3 V, temperature = 25 °C, FXOSC = 32 MHz, FRF = 915 MHz, 2-level FSK modulation without pre-filtering,
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
IDDR
Description
Supply current in sleep mode
Supply current in Idle mode
Supply current in standby mode
Supply current in synthesizer
mode
Supply current in receive mode
Conditions
RC oscillator enabled
Crystal oscillator enabled
2.4.2. Frequency Synthesis
Table 5 Frequency Synthesizer Specification
Min Typ Max Unit
-
0.1
1 uA
-
1.2
- uA
-
1.25 1.5 mA
-
9
- mA
-
16
- mA
Symbol
FR
FXOSC
TS_OSC
TS_FS
TS_HOP
FSTEP
FRC
BRF
BRO
Description
Synthesizer Frequency Range
Conditions
Programmable
Crystal oscillator frequency
Crystal oscillator wake-up time
See section 7.1
Min Typ
290
-
424
-
862
-
-
32
-
250
Max
340
510
1020
-
500
Unit
MHz
MHz
MHz
MHz
us
Frequency synthesizer wake-up From Standby mode
-
time to PllLock signal
Frequency synthesizer hop time
at most 10 kHz away from the
target
200 kHz step -
1 MHz step -
5 MHz step -
7 MHz step -
12 MHz step -
20 MHz step -
25 MHz step -
Frequency synthesizer step
FSTEP = FXOSC/219
-
RC Oscillator frequency
After calibration
-
Bit rate, FSK
Programmable
1.2
Bit rate, OOK
Programmable
1.2
80
20
20
50
50
80
80
80
61.0
62.5
-
-
150 us
-
us
-
us
-
us
-
us
-
us
-
us
-
us
-
Hz
-
300
32.768
kHz
kbps
kbps
Rev 3 - Jan 2011
Page 12
www.semtech.com
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