TH72016
433MHz
FSK/ASK Transmitter
39010 72016 Page 12 of 15 Data Sheet
Rev. 009 Jan/12
5 Test Circuit
Fig. 6: Test circuit for FSK and ASK with 50 Ω matching network
5.1 Test circuit component list to Fig. 6
Part Size
Value @
433.92 MHz
Tolerance Description
CM1 0805 5.6pF
±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
0805 10 pF
±5% XOSC FSK capacitor (∆f = ±20 kHz), note 1
CX1
_ASK
0805 18 pF
±5%
XOSC ASK capacitor, trimmed to f
C
, note 1
CX2 0805 27 pF
±5% XOSC capacitor (∆f = ±20 kHz), note 1
only needed for FSK
CCK 0805 18 pF / 180 pF
±5%
clock spur suppression capacitor, CKDIV 0 / 1
RPS 0805 see section 4.6
±5%
FSK or CW mode power-select resistor
R1 0805 see section 4.7
±5%
ASK power-select resistor, not used at FSK
CB0 1206 220 nF
±20%
de-coupling capacitor
CB1 0805 330 pF
±10%
de-coupling capacitor
XTAL SMD
6x3.5
13.56000MHz
±30ppm cal.
±30ppm temp.
fundamental wave crystal,
CL = 10 pF, C0, max = 5 pF, R1 = 50 Ω
Note 1: value depending on crystal parameters
Note 2: for high-power applications high-Q wire-wound inductors should be used
CM1
CM2
OUT
CM3
LM
LT
CKOUT
CKDIV
GND
FSK_DTA
ASK_DTA
VCC
EN
1
GND
21 21
GND
VCC
F
C
E
R
8910
XTAL
CX2
CCK
1
2
VCC
GND
GND