TDA5220XT Infineon Technologies, TDA5220XT Datasheet - Page 22

• Manufacturer Part Number: TDA5220XT
• Manufacturer: Infineon Technologies

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

3.3
The value of the capacitor necessary to achieve that the crystal oscillator is operating at
the intended frequency is determined by the reactive part of the negative resistance of
the oscillator circuit as shown in Section 4.1.3 and by the crystal specifications given by
the crystal manufacturer.
Figure 6
The required series capacitor for a crystal with specified load capacitance C
calculated as
C
Example:
13.4 MHz: C
This value may be obtained by putting two capacitors in series to the crystal, such as
22pF and 8.2pF for 13.4MHz.
But please note that the calculated C
3.4
As described in Section 2.4.3 the operating range of the on-chip VCO is wide enough to
guarantee a receive frequency range between 810 and 870MHz or between 400 and
440MHz. The VCO signal is divided by 2 before applied to the mixer in case of operation
at 434MHz. This local oscillator signal can be used to downconvert the RF signals both
Preliminary Specification
L
is the nominal load capacitance specified by the crystal manufacturer.
Crystal Load Capacitance Calculation
Crystal Frequency Calculation
L
Determination of Series Capacitance Vale for the Quartz Oscillator
= 12 pF
Crystal
X
L
=1010
C
C
S
impedance
S
S
Z
-value includes all parasitic.
1-28
Input
C
1
L
22
2
1
f
X
C
L
S
TDA521X
= 5.9 pF
28
1
CRST2
CRST1
V 1.1, 2004-10-20
Applications
TDA 5220
L
can be