TH7108(2001) Ver la hoja de datos (PDF) - Melexis Microelectronic Systems
Número de pieza
componentes Descripción
Lista de partido
TH7108 Datasheet PDF : 12 Pages
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TH7108
868/915MHz
FSK/FM/ASK Transmitter
Test Circuit
Fig. 2: Test circuit for FSK, ASK and FM;
with 50Ω matching network
C4
L3
OUT
C3
C2
C1
C5 L1
L2 C6
RPS
RF2
CX2
RF1
XTAL
R3
CX3
CF2
CF1
CX1
V1
R1
R2
C7
12 12 12
12 12 3 12
Test circuit component list to Fig. 2
Part Size
Value
CF1
CF2
CX1_FSK
CX1_ASK
CX2
CX3
C1
C2
C3
C4
C5
C6
C7
L1
L2
L3
RF1
RF2
RPS
R1
R2
R3
V1
XTAL
0603
0603
0603
0603
0603
0603
0603
0805
0805
0603
0603
0603
1206
0603
0603
0805
0805
0805
0805
0805
0805
0805
SOD323
HC49/S
5.6 nF
NIP
56 pF
18 pF
1 nF
1 nF
0.47 pF
1.0 pF
1.8 pF
150 pF
330 pF
330 pF
220 nF
10 nH
15 nH
15 nH
1.6 kΩ
2.0 kΩ
56 kΩ
470 kΩ
30 kΩ
0Ω
BB535
27.1344 MHz
fundamental wave
Tolerance
±10%
±10%
±5%
±5%
±5%
±10%
±5%
±5%
±5%
±5%
±10%
±10%
±20%
±5%
±5%
±5%
±10%
±10%
±10%
±10%
±10%
±10%
±30ppm calibr.
±30ppm temp.
Description
loop filter capacitor
loop filter capacitor
XOSC capacitor for FSK (∆f = ±30 kHz)
XOSC capacitor for ASK, trimmed to fC
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
loop filter resistor
loop filter resistor
power-select resistor
optional pull-up resistor
varactor bias resistor, (for FM only)
ASK jumper, (for ASK only)
varactor diode (for FM only)
crystal, Cload = 12 pF to 15 pF, C0, max = 7 pF,
Rm, max = 40 Ω
3901007108
Rev. 005
Page 8 of 12
Data Sheet
Dec. 2001
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