TH72012_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
TH72012
433MHz
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. 17
Part Size
Value @
433.92 MHz
Tolerance
Description
CM1 0805
5.6 pF
±5%
impedance matching capacitor
CM2
CM3
LM
0805
0805
0805
10 pF
82 pF
33 nH
±5%
impedance matching capacitor
±5%
impedance matching capacitor
±5%
impedance matching inductor, note 2
LT
CX1
RPS
CB0
CB1
XTAL
0805
0805
0805
1206
0805
HC49/S
33 nH
27 pF
see para. 4.6
220 nF
330 pF
13.56000 MHz
±5%
±5%
±5%
±20%
±10%
±30ppm calibr.
±30ppm temp.
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
3901072012
Rev. 012
Page 17 of 20
Data Sheet
Jun/12