TDA5100 Infineon Technologies, TDA5100 Datasheet - Page 25

• Manufacturer Part Number: TDA5100
• Description: TRANSMITTER ASK/FSK P-TSSOP-16
• Manufacturer: Infineon Technologies

Specifications of TDA5100

• Frequency: 433 ~ 435MHz; 866 ~ 870MHz
• Applications: Alarm Systems, Communication Systems
• Modulation Or Protocol: ASK, FSK
• Data Rate - Maximum: 20 kbps
• Power - Output: 5dBm
• Current - Transmitting: 7mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.1 V ~ 4 V
• Operating Temperature: -25°C ~ 85°C
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: SP000016393; TDA5100INTR

Wireless Components
4.4 Hints
1. Application Hints on the crystal oscillator
As mentioned before, the crystal oscillator achieves a turn on time less than
1 msec. To achieve this, a NIC oscillator type is implemented in the TDA 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 is specified within the elec-
trical characteristics at 13.5 MHz to a value of 11 uH. Therefore C6 is calculated
to 7.7 pF.
CL:
L:
:
-R
4 - 5
crystal load capacitance for nominal frequency
angular frequency
inductivity of the crystal oscillator
Cv
T D A 5 1 0 0
CL
Cv
L
1
1
CL
1
2
L
1
f, C L
C
2
L
6
C v
Specification, June 2001
Formula 1)
Applications
TDA 5100