TDA5250D2_07 INFINEON [Infineon Technologies AG], TDA5250D2_07 Datasheet - Page 50
![no-image](/images/no-image-200.jpg)
TDA5250D2_07
Manufacturer Part Number
TDA5250D2_07
Description
ASK/FSK 868MHz Wireless Transceiver
Manufacturer
INFINEON [Infineon Technologies AG]
Datasheet
1.TDA5250D2_07.pdf
(94 pages)
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3.2
The equivalent schematic of the crystal with its parameters specified by the crystal manufacturer
can be taken from the subsequent figure.
Here also the load capacitance of the crystal C L , which the crystal wants to see in order to oscillate
at the desired frequency, can be seen.
Figure 3-14
Therefore the Resonant Frequency f s of the crystal is defined as:
The Series Load Resonant Frequency f S ‘ of the crystal is defined as:
regarding Figure 3-14
f s ’ is the nominal frequency of the crystal with a specified load when tested by the crystal
manufacturer.
Pulling Sensitivity of the crystal is defined as the magnitude of the relative change in frequency
relating to the variation of the load capacitor.
Data Sheet
f
f
S
S
Crystal Oscillator
`
=
=
2
2
Crystal
π
π
L
L
1
1
1
1
*
*
C
C
L
C
C
-R
1
1
1
1
0
:
:
:
*
1
motional inductance of the crystal
motional capacitance of the crystal
shunt capacitance of the crystal
+
C
0
C
+
1
C
L
L
1
50
C
C
1
0
R
1
[3 – 14]
[3 – 13]
C
L
TDA5250 D2
Version 1.7
Application
2007-02-26
Crystal.wmf
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