TH72015 Datasheet, PDF (17/20 Pages) Melexis Microelectronic Systems – 433MHz FSK/ASK Transmitter

6 Test Circuit
TH72015
433MHz
FSK/ASK Transmitter
CM2
CM1
OUT
LM
CM3
LT
RPS
CB1
10 9 8 7 6
1
CB0
23 4
CX2
CX1
5
XTAL
12 12 3 4
12 3
Fig. 18: Test circuit for FSK and ASK with 50 Ω matching network
6.1 Test circuit component list to Fig. 18
Part Size
Value @
433.92 MHz
Tolerance
Description
CM1 0805
5.6 pF
±5%
impedance matching capacitor
CM2 0805
10 pF
±5%
impedance matching capacitor
CM3 0805
82 pF
±5%
impedance matching capacitor
LM
0805
33 nH
±5%
impedance matching inductor, note 2
LT
0805
33 nH
±5%
output tank inductor, note 2
CX1_{_FSK}
CX1_{_ASK}
CX2
0805
0805
0805
12 pF
27 pF
33 pF
±5%
±5%
±5%
XOSC FSK capacitor (Δf = ±28 kHz), note 1
XOSC ASK capacitor_, trimmed to f_C, note 1
XOSC capacitor (Δf = ±28 kHz), note 1
only needed for FSK
RPS
0805
see section 4.6
±5%
power-select resistor
CB0
1206
220 nF
±20%
de-coupling capacitor
CB1
0805
330 pF
±10%
de-coupling capacitor
XTAL HC49/S 13.56000MHz
±30ppm calibr. fundamental wave crystal,
±30ppm temp. 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
39010 72015
Rev. 008
Page 17 of 20
Data Sheet
June/07