TH72016_12 Datasheet, PDF (12/15 Pages) Melexis Microelectronic Systems – FSK/ASK Transmitter

5 Test Circuit
TH72016
433MHz
FSK/ASK Transmitter
OUT
CM2
CM1
LM
CM3
LT
CB1
10 9 8
RPS
76
12345
CX1
CB0
12
12 1 23
R1
12 12 12
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 fC, 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
CB0
1206
220 nF
CB1
0805
330 pF
±5%
±20%
±10%
ASK power-select resistor, not used at FSK
de-coupling capacitor
de-coupling capacitor
XTAL
SMD
6x3.5
13.56000MHz
±30ppm cal. fundamental wave crystal,
±30ppm temp. 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
39010 72016
Rev. 009
Page 12 of 15
Data Sheet
Jan/12