TH7108 Просмотр технического описания (PDF) - Unspecified
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TH7108 Datasheet PDF : 8 Pages
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TH7108
868/915MHz FSK/ASK/FM Transmitter
Test Circuit
Fig. 2: test circuit for FSK, ASK and FM; with 50Ω matching network
OUT
L3
C3
C2
C1
C5
L1
L2 C6
RPS
CX2
RF1
CX3
XTAL
C7 CF2 CF1
V1
R2 CX1
R3
R1
12
12
12
12 12 3 12
test circuit component list
Part
Size
Value
CF1
0603
5.6 nF
CF2
0603
4.7 pF
CX1
0603
15 pF
CX2
0603
12 pF
CX3
0603
1 nF
C1
0603
0.47 pF
C2
0805
1.2 pF
C3
0805
5.5 pF
C4
0603
10 pF
C5
0603
330 pF
C6
0603
330 pF
C7
1206
220 nF
L1
0603
10 nH
L2
0603
15 nH
L3
0805
15 nH
RF1
0805
3.6 kΩ
RF2
0805
2.2 kΩ
RPS
0805
47 kΩ
R1
0805
470 kΩ
R2
0805
30 kΩ
R3
0805
0Ω
V1
SOD323
BB535
XTAL
HC49/S
27.1344 MHz
fundamental wave
Tolerance
±10%
±10%
±5%
±5%
±10%
±5%
±5%
±5%
±5%
±10%
±10%
±20%
±5%
±5%
±5%
±10%
±10%
±10%
±10%
±10%
±10%
±30ppm calibration
±30ppm temp.
Description
loopfilter capacitor
loopfilter capacitor
XOSC capacitor, for FSK only
XOSC capacitor, for FSK only
XOSC capacitor, for FM only
impedance matching capacitor
impedance matching capacitor
impedance matching capacitor
impedance matching capacitor
blocking capacitor
blocking capacitor
blocking capacitor
impedance matching inductor
impedance matching inductor
impedance matching inductor
loopfilter resistor
loopfilter resistor
power-select resistor
pull-up resistor, optional
varactor bias resistor, for FM only
ASK jumper, for ASK only
varactor diode, for FM only
crystal, Cload = 12pF, C0,max = 4pF, Cm = 20fF, Rm= 10 -20Ω
Rev. 2.0
Preliminary Datasheet
6
February 2000
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