XE1203SKC868XE2 Semtech, XE1203SKC868XE2 Datasheet - Page 34

• Manufacturer Part Number: XE1203SKC868XE2
• Description: KIT STARTER FOR XE1203 868MHZ
• Manufacturer: Semtech
• Series: TrueRF™r
• Type: Transceiver, ISMr

Specifications of XE1203SKC868XE2

• Frequency: 868MHz
• For Use With/related Products: XE1203 (868MHz)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

6.3
6.4
The typical component values of this matching circuit are shown below in Table 23:
The tank of the VCO is implemented with one inductor in parallel with one capacitor. The characteristics of these
two components must be as follows:
The loop filter of the frequency synthesizer is shown in
© Semtech 2008
VCO TANK
LOOP FILTER OF THE FREQUENCY SYNTHESIZER
Table 23: Typical component values for the recommended matching network at the output of the transmitter
Name
CV1
LV1
Name
CT1
CT2
CT3
CT4
CT5
LT1
LT2
LT3
Typical Value
for 434 MHz
RL1
CL1
Typical Value
for 434 MHz
1.0 pF
Figure 24: Loop filter of the frequency synthesizer
33 nH
6.8 pF
1.0 pF
6.8 pF
4.7 pF
33 nH
22 nH
22 nH
22 pF
Table 24: VCO tank external components
CL2
Typical Value
Typical Value
for 868 MHz
for 868 MHz
0.56 pF
8.2 nH
8.2 nH
1.5 pF
3.3 pF
2.2 pF
Figure 24 below:
39 nH
10 nH
15 pF
NC
34
LFB
Typical Value
Typical Value
for 915 MHz
for 915 MHz
XE1203
XE1203F
8.2 nH
1.8 pF
3.3 pF
2.2 pF
6.8 nH
47 nH
10 nH
33 pF
NC
NC
Tolerance
Tolerance
± 5 %
± 2 %
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
XE1203F
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