SX1223I073TRT Semtech, SX1223I073TRT Datasheet - Page 22

• Manufacturer Part Number: SX1223I073TRT
• Description: IC TX UHF 433/868/916 MHZ 24TQFN
• Manufacturer: Semtech

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