TDA5221 Infineon Technologies, TDA5221 Datasheet - Page 21

• 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

3.2
Utilising the on-board voltage follower and the two 100k on-chip resistors a 2nd order
Sallen-Key low pass data filter can be constructed by adding 2 external capacitors
between pins 19 (SLP) and 22 (FFB) and to pin 21 (OPP) as depicted in the following
figure and described in the following formulas
Figure 5
with R
with
Q is the qualify factor of the poles where, in case of a Bessel filter a=1.3617, b=0.618
and thus Q=0.577
and in case of a Butter worth filter a=1.414, b=1
and thus Q=0.71
Example: Butter worth filter with f
C14=450pF, C12=225pF
1) taken from Tietze/Schenk: Halbleiterschaltungstechnik, Springer Berlin, 1999
Preliminary Specification
F1int
=R
Data Filter Design
F2int
Data Filter Design
=R
R
100k
F1 int
C
FFB
C14
14
22
3dB
R
2
2
Q
=5kHz and R=100k
R
100k
f
F2 int
3
b
dB
Q
OPP
C12
21
C
12
a
1)
b
21
.
4
QR
b
f
3
dB
SLP
19
V 1.1, 2004-10-20
Applications
TDA 5221