TDA5252XT Infineon Technologies, TDA5252XT Datasheet - Page 39
![no-image](/images/manufacturer_photos/0/3/327/infineon_technologies_sml.jpg)
TDA5252XT
Manufacturer Part Number
TDA5252XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.TDA5252XT.pdf
(86 pages)
Specifications of TDA5252XT
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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Measured Magnitude of S11 of evalboard:
Figure 3-3
Above you can see the measured S11 of the evalboard. The –3dB-points are at 851MHz and
989MHz. So the 3dB-bandwidth is:
The loaded Q of the resonant circuit is:
The unloaded Q of the resonant circuit is equal to the Q of the inductor due to its losses.
An approximation of the losses of the input matching network can be made with the formula:
Data Sheet
L
OSS
=
B
−
20
Q
=
Q
U
*
f
L
U
log
=
=
−
Q
S11 measured
1
f
f
INDUCTOR
−
L
center
B
Q
Q
=
U
L
989
=
=
MHz
−
138
915
≈
20
36
*
MHz
MHz
−
log
@
851
915
1
MHz
−
=
. 6
MHz
. 6
36
63
63
=
138
=
1
8 ,
MHz
dB
39
[3 – 4]
[3 – 1]
[3 – 3]
[3 – 2]
TDA5252 G2
S11_measured_915.pcx.
Version 1.1
Application
2007-02-26
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