TDA5251 Infineon Technologies, TDA5251 Datasheet - Page 47

• Manufacturer Part Number: TDA5251
• Description: TXRX FSK/ASK SGL LP TSSOP-38
• Manufacturer: Infineon Technologies
• Type: Transceiverr

Specifications of TDA5251

• Package / Case: 38-TSSOP
• Frequency: 315MHz
• Data Rate - Maximum: 64kbps
• Modulation Or Protocol: ASK, FSK
• Applications: RKE, Remote Control Systems
• Power - Output: 13dBm
• Sensitivity: -109dBm
• Voltage - Supply: 2.1 V ~ 5.5 V
• Current - Receiving: 9.3mA
• Current - Transmitting: 14mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Operating Frequency: 0.35 MHz
• Operating Supply Voltage: 2.5 V, 3.3 V, 5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 4.4mm
• Product Length (mm): 9.7mm
• Operating Supply Voltage (min): 2.1V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: SP000014554; TDA5251; TDA5251INTR; TDA5251XT

3.2
The equivalent schematic of the crystal with its parameters specified by the crystal manufacturer
can be taken from the subsequent figure.
Here also the load capacitance of the crystal C L , which the crystal wants to see in order to oscillate
at the desired frequency, can be seen.
Figure 3-12
Therefore the Resonant Frequency f s of the crystal is defined as:
The Series Load Resonant Frequency f S ‘ of the crystal is defined as:
regarding Figure 3-12
f s ’ is the nominal frequency of the crystal with a specified load when tested by the crystal
manufacturer.
Pulling Sensitivity of the crystal is defined as the magnitude of the relative change in frequency
relating to the variation of the load capacitor.
Data Sheet
f
f
S
S
Crystal Oscillator
`
=
=
2
2
Crystal
π
π
L
1
L
1
1
1
*
*
C
C
L
C
C
1
-R
1
1
1
0
:
:
:
*
1
motional inductance of the crystal
motional capacitance of the crystal
shunt capacitance of the crystal
+
C
0
C
+
1
C
L
L
1
47
C
C
1
0
R
1
[3 – 14]
[3 – 13]
C
L
TDA5251 F1
Version 1.1
Application
2007-02-26
Crystal.wmf