TDA5250XT Infineon Technologies, TDA5250XT Datasheet - Page 52
![no-image](/images/manufacturer_photos/0/3/327/infineon_technologies_sml.jpg)
TDA5250XT
Manufacturer Part Number
TDA5250XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.TDA5250XT.pdf
(94 pages)
Specifications of TDA5250XT
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Product Depth (mm)
4.4mm
Product Length (mm)
9.7mm
Operating Supply Voltage (min)
2.1V
Operating Supply Voltage (max)
5.5V
Lead Free Status / Rohs Status
Compliant
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Figure 3-15
With the aid of this formula it becomes obvious that the higher the serial capacitance C V is, the
higher is the influence of L OSC .
The tolerance of the internal oscillator inductivity is much higher, so the inductivity is the dominating
value for the tolerance.
FSK modulation and tuning are achieved by a variation of C
In case of small frequency deviations (up to +/- 1000 ppm), the desired load capacitances for FSK
modulation are frequency depending and can be calculated with the formula below.
Data Sheet
C
L
=
C L ±
C
1
V
−
Crystal Oscillator
ω
1
=
2
L
C
----------------------------------------------------------------------------------------- -
OSC
C
ω:
L
C
C
C
f:
N:
L
OSC
1
L
L
0
1
+ −
:
:
:
:
±
↔
C
----------
N f ⋅
0
:
∆f
C
⋅
----------
N f ⋅
V
∆f
-R
⋅
=
crystal load capacitance for nominal frequency
angular frequency
inductivity of the crystal oscillator - typ: 2.7µH with pad of board
crystal load capacitance for nominal frequency
shunt capacitance of the crystal
motional capacitance of the crystal
crystal oscillator frequency
division ratio of the PLL
1
C
⋅
1
+
L
1
2
---------------------------------
+
+
⋅
ω
1
(
2
---------------------------------
C
2
TDA 5250
⋅
C
0
L
(
1
L
OSC
C
+
OSC
C 1
0
C
+
L
C
)
L
)
52
f, C
v
.
L
C
2.45µH without pad
V
[3 – 18]
[3 – 17]
TDA5250 D2
Version 1.7
Application
2007-02-26
QOSZ_NIC.wmf
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