TDA7210 Infineon Technologies, TDA7210 Datasheet - Page 26

• Manufacturer Part Number: TDA7210
• Description: IC RECEIVER FSK/ASK 28-TSSOP
• Manufacturer: Infineon Technologies
• Type: ASK/FSK Single Conversion Receiverr

Specifications of TDA7210

• Package / Case: 28-TSSOP
• Frequency: 810MHz ~ 870MHz, 400MHz ~ 440MHz
• Sensitivity: -110dBm
• Data Rate - Maximum: 100 kbps
• Modulation Or Protocol: ASK, FSK
• Applications: Remote Control, RKE, Security Systems
• Current - Receiving: 5.9mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Current: 7.7 mA
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 28
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: SP000524274; TDA7210; TDA7210INTR

Wireless Components
4.3 Quartz Load Capacitance Calculation
The value of the capacitor necessary to achieve that the quartz 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 5.1.3 and by the
quartz specifications given by the quartz manufacturer.
Figure 4-4
Crystal specified with load capacitance
with C
Examples:
6.7 MHz: C
13.4 MHz: C
These values may be obtained in high accuracy by putting two capacitors in
series to the quartz, such as 22pF and 15pF in the 6.7MHz case and 22pF and
8.2pF in the 13.4MHz case.
But please note that the calculated value of C
also.
L
the load capacitance (refer to the quartz crystal specification).
L
L
Determination of Series Capacitance Value for the Quartz Oscillator
= 12 pFX
= 12 pFX
L
Crystal
=695 Ω C
4 - 5
L
=1010 Ω C
C
S
S
C
impedance
=
Z
S
= 8.9 pF
1-28
Input
S
C
1
= 5.9 pF
L
+
2
1
π
f
S
TDA7210
X
Pin 1
includes the parasitic capacitors
Pin 28
L
Data Sheet, December 2008
Applications
TDA7210
Quartz_load.wmf