th7107 ETC-unknow, th7107 Datasheet - Page 8

• Manufacturer Part Number: th7107
• Description: Fsk/fm/ask Transmitter
• Manufacturer: ETC-unknow

Crystal Parameter
Center Frequency as Function of CX1 and CX2
3901007107
Rev. 005
Crystal frequency
Load capacitance
Static capacitance
Resonance resistance
Spurious response
The center frequency f
typical values at T
XTAL = 13.55 MHz, Cload = 15 pF, shown in Fig. 2
Parameter
CX1 / pF
433.630
433.625
433.620
433.615
433.610
433.605
433.600
433.595
433.590
104
22
32
40
49
61
10
a
= 23 °C and V
Fig. 2: Center frequency vs. CX1, at different CX2
Symbol
C
f
C
a
crystal
R
is defined as (f
C
spur
load
m
0
20
CX2 = 1 nF
f
433.612
433.604
433.598
433.596
433.593
433.587
C
fundamental mode, AT
/ MHz
cc
30
= 3 V:
max
Condition
Cx1/pF
+ f
40
Page 8 of 14
min
) /2.
50
CX2 = 100 pF
f
433.619
433.610
433.604
433.601
433.598
C
/ MHz
60
9.69
Min
FSK/FM/ASK Transmitter
10
70
CX2 = 47 pF
Max
-10
14
15
60
7
f
433.625
433.614
433.608
433.604
433.600
Cx2 = 1nF
CX2 = 100pF
Cx2 = 47pF
C
/ MHz
TH7107
315/433MHz
Data Sheet
Dec. 2001
MHz
Unit
dB
pF
pF