TDK5110GEG Infineon Technologies, TDK5110GEG Datasheet - Page 27

• Manufacturer Part Number: TDK5110GEG
• Manufacturer: Infineon Technologies

Specifications of TDK5110GEG

• 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: Supplier Unconfirmed

Wireless Components
4.5 Application Hints on the Crystal Oscillator
The crystal oscillator achieves a turn on time less than 1 msec when the
specified crystal is used. To achieve this, a NIC oscillator type is implemented
in the TDK 5110. The input impedance of this oscillator is a negative resistance
in series to an inductance. Therefore the load capacitance of the crystal CL
(specified by the crystal supplier) is transformed to the capacitance Cv.
Example for the ASK-Mode:
Referring to the application circuit, in ASK-Mode the capacitance C7 is replaced
by a short to ground. Assume a crystal frequency of 13.56 MHz and a crystal
load capacitance of CL = 20 pF. The inductance L at 13.5 MHz is about 4.6 H.
Therefore C6 is calculated to 12 pF.
CL:
L:
:
-R
4 - 7
crystal load capacitance for nominal frequency
angular frequency
inductance of the crystal oscillator
Cv
Cv
TDK 5110
CL
1
L
CL
1
1
1
2
L
2
L
f, CL Cv
C
6
(1)
Specification, October 2002
Applications
TDK 5110