TH71081 Datasheet, PDF (7/10 Pages) List of Unclassifed Manufacturers – 868/915MHz ASK Transmitter / LO Source

Test Circuit
Fig. 2: Test circuit for ASK
with 50Ω matching network
TH71081
868/915MHz
ASK Transmitter / LO Source
OUT
C3
L2
L1 _C4
L3 C2 C1
C5
CX
RF1
XTAL
CF2 CF1
R2
R1
C6
12 3 12 12
Test circuit component list to Fig. 2
Part Size
Value
CF1
CF2
CX
C1
C2
C3
C4
C5
C6
L1
L2
L3
RF1
R1
R2
XTAL
0603
0603
0603
0603
0603
0805
0603
0603
0805
0603
0603
0603
0603
0603
0603
HC49/S
4.7 nF
56 pF
18 pF
0.68 pF
33 pF
2.2 pF
330 pF
330 pF
33 nF
8.2 nH
15 nH
22 nH
1.0 kΩ
See output power
selection table
See output power
selection table
27.1344 MHz
fundamental wave
Tolerance
±10%
±10%
±10%
±5%
±5%
±5%
±10%
±10%
±10%
±5%
±5%
±5%
±10%
±10%
Description
loop filter capacitor
loop filter capacitor
XOSC 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
ASK power-select resistor, not requirement at CW mode
±10%
ASK or CW mode power-select resistor
±30ppm
calibration
±30ppm temp.
crystal, Cload = 12 pF to 15 pF, C0, max = 7 pF,
Rm, max = 40 Ω
3901071081
Rev. 004
Page 7 of 10
Data Sheet
Dec. 2001