TDA7100XT Infineon Technologies, TDA7100XT Datasheet - Page 28

• Manufacturer Part Number: TDA7100XT
• Manufacturer: Infineon Technologies

Specifications of TDA7100XT

• Operating Temperature (min): -20C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 2.1V
• Operating Supply Voltage (typ): 2.5/3.3V
• Lead Free Status / Rohs Status: Compliant

C
C
f:
ω:
N:
df:
Because of the inductive part of the TDA7100, these values must be corrected by
Formula 1 on the preceding page. The value of Cv± can be calculated.
If the FSK switch is closed, Cv
FSK switch is open, Cv2 (C2 in the application diagram) can be calculated.
Csw:
Remark:
on the layout also and must be adapted for the specific application board.
3.8
The CLKOUT pin is an open collector output. An external pull up resistor (RL) should be
connected between this pin and the positive supply voltage. The value of RL is
Data Sheet
L
0
:
:
parallel capacitance of the FSK switch (3 pF incl. layout parasitics)
These calculations are only approximations. The necessary values depend
Design Hints on the Clock Output (CLKOUT)
crystal load capacitance for nominal frequency
shunt capacitance of the crystal
frequency
ω = 2
division ratio of the PLL
peak frequency deviation
π
f: angular frequency
Cv
2
=
C
2
-
=
Cv
is equal to Cv1 (C1 in the application diagram). If the
Csw
±
=
∗
Cv
CL
1
28
1
±
(
−
Cv
1
(
+
Cv
+
ω
)
+
2
−
)
L
Cv
∗
(
Cv
1
1
+
Csw
)
V 1.0, 2007-05-02
Applications
TDA7100