TDA5221 Infineon Technologies, TDA5221 Datasheet - Page 22

• Manufacturer Part Number: TDA5221
• Description: RECEIVER SHR FSK/ASK SGL TSSOP28
• Manufacturer: Infineon Technologies
• Type: Receiverr

Specifications of TDA5221

• Package / Case: 28-TSSOP
• Frequency: 300MHz ~ 340MHz
• Sensitivity: -113dBm
• Data Rate - Maximum: 100 kbps
• Modulation Or Protocol: ASK, FSK
• Applications: RKE, Remote Control Systems
• Current - Receiving: 6.2mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 105°C
• Operating Frequency: 340 MHz
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Temperature (min): -40C
• Operating Temperature (max): 105C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 4.4mm
• Product Length (mm): 9.7mm
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: SP000014343; TDA5221; TDA5221INTR; TDA5221XT

3.3
The value of the capacitor necessary to achieve that the crystal oscillator is operating at
the intended frequency is determined by the reactive part of the negative resistance of
the oscillator circuit as shown in Section 4.1.3 and by the crystal specifications given by
the crystal manufacturer.
Figure 6
The required series capacitor for a crystal with specified load capacitance C
calculated as
C
Example:
10.18 MHz: C
This value may be obtained by putting two capacitors in series to the crystal, such as
18pF and 12pF in the 10.2MHz case.
But please note that the calculated C
3.4
As described in Section 2.4.3 the operating range of the on-chip VCO is wide enough to
guarantee a receive frequency range between 300 and 340MHz. The VCO signal is
divided by 2 before applied to the mixer . This local oscillator signal can be used to
downconvert the RF signals both with high- or low-side injection at the mixer. High-side
Preliminary Specification
L
is the nominal load capacitance specified by the crystal manufacturer.
Crystal Load Capacitance Calculation
Crystal Frequency Calculation
L
Determination of Series Capacitance Vale for the Quartz Oscillator
= 12 pF
Crystal
X
L
=870
C
C
S
impedance
S
S
Z
-value includes all parasitic.
1-28
Input
C
1
L
22
2
1
f
X
C
L
S
TDA521X
= 7.2 pF
28
1
CRST2
CRST1
V 1.1, 2004-10-20
Applications
TDA 5221
L
can be