SX1223I073TRT Semtech, SX1223I073TRT Datasheet - Page 22
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SX1223I073TRT
Manufacturer Part Number
SX1223I073TRT
Description
IC TX UHF 433/868/916 MHZ 24TQFN
Manufacturer
Semtech
Datasheet
1.SX1223SK433.pdf
(25 pages)
Specifications of SX1223I073TRT
Frequency
425 ~ 475MHz / 850 ~ 950MHz
Applications
AMR, Home Automation, HQ Music and Data
Modulation Or Protocol
FSK
Data Rate - Maximum
153.6 kbps
Power - Output
10dBm
Current - Transmitting
25.8mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Voltage - Supply
2 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Package / Case
24-TQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Memory Size
-
Other names
SX1223I073TR
6.2
The crystal for the reference oscillator of the frequency synthesizer should have the following typical characteristics:
6.3
6.4
© Semtech 2007
The loop filter component values used in MW2 mode for specification validation are presented below; (see fig.5b)
[kb/s]
153.6
REFERENCE CRYSTAL FOR THE FREQUENCY SYNTHESIZER
LOOP FILTER COMPONENTS
RECOMMENDED MODULATION CONDITIONS
rate
19.2
32.8
38.4
76.8
Bit
1.2
2.4
4.8
9.6
Name
Fs
CL
Rm
Cm
C0
Frequency
100 to 255
100 to 255
100 to 255
200 to 255
100 to 255
deviation
10 to 255
20 to 255
40 to 255
40 to 255
80 to 255
5 to 255
5 to 255
5 to 255
[kHz]
Description
Nominal frequency
Load capacitance for fs (on-chip)
Motional resistance
Motional capacitance
Shunt capacitance
Modulation
mw3
mw1
mw2
mw1
mw2
mw1
mw2
mw1
mw2
type
Table 35: Modulation Type Selection
12k
R1
Table 34: Crystal characteristics
Max. carrier
not regularly
frequency
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
≤ 100 kHz
Up to 300
spaced
step
kHz,
470pF
C1
22
4.7nF
Manchester
Manchester
Manchester
Manchester
Min. value
C2
Coding
NRZ
NRZ
NRZ
NRZ
NRZ
-
-
-
-
-
33nF
C3
(fundamental)
Typ. value
16.0 MHz
Burst (2 kbits for f ≥ 100 kHz)
Burst (1 kbits for f ≥ 100 kHz)
Burst (1 kbits for f ≥ 100 kHz)
Burst (4 kbits for f ≥ 100 kHz)
Allowed transmission mode
9 pF
-
-
-
Continuous
Continuous
Continuous
Continuous
Continuous
Max. value
30 fF
7 pF
40
-
-
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SX1223