TH72002_12 Datasheet, PDF (17/20 Pages) Melexis Microelectronic Systems – ASK Transmitter

6 Test Circuit
CM2
CM1
OUT
LM CM3
LT
CB1
RPS
8
7
6
5
TH72002
315MHz
ASK Transmitter
12 3
XTAL
CX1
CB0
12 3 12
Fig. 17: Test circuit for ASK with 50 Ω matching network
6.1 Test circuit component list to Fig. 18
Part Size
Value @
315 MHz
Tolerance
Description
CM1 0805
10 pF
±5%
impedance matching capacitor
CM2
CM3
LM
LT
CX1
RPS
CB0
CB1
XTAL
0805
0805
0805
0805
0805
0805
1206
0805
HC49/S
15 pF
82 pF
47 nH
33 nH
27 pF
see para. 4.6
220 nF
330 pF
9.84375MHz
±5%
±5%
±5%
±5%
±5%
±5%
±20%
±10%
±30ppm calibr.
±30ppm temp.
impedance matching capacitor
impedance matching capacitor
impedance matching inductor, note 2
output tank inductor, note 2
XOSC capacitor, note 1
power-select resistor
blocking capacitor
blocking capacitor
fundamental wave crystal,
CL = 12 pF, C0, max = 7 pF, R1 = 60 Ω
Note 1: value depending on crystal parameters
Note 2: for high-power applications high-Q wire-wound inductors should be used
3901072002
Rev. 010
Page 17 of 20
Data Sheet
Jun/12