TDK5100 Infineon Technologies, TDK5100 Datasheet - Page 26

• Manufacturer Part Number: TDK5100
• Description: IC TRANSMITTER ASK/FSK 16-TSSOP
• Manufacturer: Infineon Technologies
• Type: Transmitterr

Specifications of TDK5100

• Package / Case: 16-TSSOP
• Frequency: 433 ~ 435MHz; 866 ~ 870MHz
• Applications: Remote Control, RKE, Security Systems
• Modulation Or Protocol: ASK, FSK
• Data Rate - Maximum: 20 kbps
• Power - Output: 3.2dBm
• Current - Transmitting: 7mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.1 V ~ 4 V
• Operating Temperature: -40°C ~ 125°C
• Operating Frequency: 870 MHz
• Operating Supply Voltage: 2.5 V, 3.3 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• 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: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: SP000014557; TDK5100; TDK5100INTR

Wireless Components
3.5 Application Hints on the Crystal Oscillator
1. 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 5100. 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.
Cv
CL:
L:
:
CL
1
-R
3 - 7
crystal load capacitance for nominal frequency
angular frequency
inductance of the crystal oscillator
Cv
1
2
L
CL
1
L
IC
1
2
L
Formula 1)
f, CL Cv
C
6
Specification, October 2002
Applications
TDK 5100