TDA5211XT Infineon Technologies, TDA5211XT Datasheet - Page 24

• Manufacturer Part Number: TDA5211XT
• Manufacturer: Infineon Technologies

Specifications of TDA5211XT

• Operating Temperature (min): -40C
• 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

Wireless Components
4.2 Data Filter Design
Utilising the on-board voltage follower and the two 100k
2nd order Sallen-Key low pass data filter can be constructed by adding 2 exter-
nal 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 4-3
(1)(2)
with
where
in case of a Bessel filter a = 1.3617, b = 0.618
and thus Q = 0.577
and in case of a Butterworth filtera = 1.414, b = 1
and thus Q = 0.71
Example: Butterworth filter with f
C
1
C
= 450pF, C
Q
1
1. taken from Tietze/Schenk: Halbleiterschaltungstechnik, Springer Berlin, 1999
=
=
----------------------
R2 f
------ -
a
2Q b
b
Data Filter Design
2
= 225pF
3dB
Pins:
4 - 4
100k
(3)the quality factor of the poles
R
C2
22
C
1
3dB
=
100k
R
= 5kHz and R = 100k :
-------------------------- -
4QR f
C
21
2
b
3dB
19
Specification, May 2001
on-chip resistors a
Applications
TDA 5211
Filter_Design.wmf
1
.