TDA5220XT Infineon Technologies, TDA5220XT Datasheet - Page 21
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TDA5220XT
Manufacturer Part Number
TDA5220XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.TDA5220XT.pdf
(51 pages)
Specifications of TDA5220XT
Operating Temperature (min)
-40C
Operating Temperature (max)
125C
Operating Temperature Classification
Automotive
Product Depth (mm)
4.4mm
Product Length (mm)
9.7mm
Operating Supply Voltage (min)
4.5V
Operating Supply Voltage (typ)
5V
Operating Supply Voltage (max)
5.5V
Lead Free Status / Rohs Status
Compliant
3.2
Utilising the on-board voltage follower and the two 100k on-chip resistors a 2nd order
Sallen-Key low pass data filter can be constructed by adding 2 external capacitors
between pins 19 (SLP) and 22 (FFB) and to pin 21 (OPP) as depicted in the following
figure and described in the following formulas
Figure 5
with R
with
Q is the qualify factor of the poles where, in case of a Bessel filter a=1.3617, b=0.618
and thus Q=0.577
and in case of a Butter worth filter a=1.414, b=1
and thus Q=0.71
Example: Butter worth filter with f
C14=450pF, C12=225pF
1) taken from Tietze/Schenk: Halbleiterschaltungstechnik, Springer Berlin, 1999
Preliminary Specification
F1int
=R
Data Filter Design
F2int
Data Filter Design
=R
R
100k
F1 int
C
FFB
C14
14
22
3dB
R
2
2
Q
=5kHz and R=100k
R
100k
f
F2 int
3
b
dB
Q
OPP
C12
21
C
12
a
1)
b
21
.
4
QR
b
f
3
dB
SLP
19
V 1.1, 2004-10-20
Applications
TDA 5220