TDK5101XT Infineon Technologies, TDK5101XT Datasheet - Page 27

• Manufacturer Part Number: TDK5101XT
• Manufacturer: Infineon Technologies

Specifications of TDK5101XT

• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• Operating Temperature Classification: Automotive
• Product Depth (mm): 4.4mm
• Operating Supply Voltage (min): 2.1V
• Operating Supply Voltage (typ): 2.5/3.3V
• Lead Free Status / Rohs Status: Compliant

Wireless Components
4.6 Design hints on the buffered clock output (CLKOUT)
If the FSK switch is closed, Cv- is equal to Cv1 (C6 in the application diagram).
If the FSK switch is open, Cv2 (C7 in the application diagram) can be calculated.
Csw:
Remark:
The 50 -Output testboard shows an FSK-deviation of +/- 22.5 kHz, typically.
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 depending on the clock frequency and the load capacitance CLD
(PCB board plus input capacitance of the microcontroller). RL can be calculated
to:
Remark: To achieve a low current consumption and a low
Table 4-2
CLD pF
5
10
20
parallel capacitance of the FSK switch (3 pF incl. layout parasitics)
spurious radiation, the largest possible RL should be chosen.
These calculations are only approximations. The necessary values
depend on the layout also and must be adapted for the specific
application board.
fCLKOUT=
Cv
615 kHz
2
C
4 - 8
RL
RL kOhm
7
39
18
10
Csw
fCLKOUT
Cv
1
(
Cv
1
(
*
Cv
8
CLD pF
)
*
CLD
)
10
20
Cv
5
(
Cv
1
Specification, October 2002
1
fCLKOUT=
2.46 MHz
Csw
)
RL kOhm
Applications
TDK 5101
4.7
2.2
10