tda5225 Infineon Technologies Corporation, tda5225 Datasheet - Page 20
tda5225
Manufacturer Part Number
tda5225
Description
Enhanced Sensitivity Multi-channel Quad-conf Igurat Ion Receiver With Digital Slicer
Manufacturer
Infineon Technologies Corporation
Datasheet
1.TDA5225.pdf
(176 pages)
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Figure 5
For applications which demand very high selectivity and/or channel separation even two
CER filters may be used. Also in applications where one channel requires a wider
bandwidth than the other (e.g. TPMS and RKE) the second filter can be by-passed.
Figure 6
Data Sheet
Input
Input
RX
RX
LNA
LNA
1
Q-Mix
Q-Mix
1
I-Mix
I-Mix
st
st
LO
LO
Double Down Conversion (DDC) with one external filter
Double Down Conversion (DDC) with two external filters
Attenuation
Attenuation
adjust
adjust
IF
IF
10.7 MHz
10.7 MHz
CER-
CER-
Filter
Filter
IF1
IF1
10.7 MHz
Filter IF1
optional
CER-
20
2
2
Mix2
Mix2
nd
Mix2
Mix2
nd
Q-
Q-
I-
I-
LO
LO
Bandwidth select
Channel Filter
Bandwidth select
Channel Filter
Functional Description
RSSI Generator
RSSI Generator
V1.0, 2010-02-19
harm sup
harm sup
alias sup
alias sup
LP
LP
LP
LP
TDA5225
FSK Demod
FSK Demod
ASK /
ASK /
RSSI
RSSI
ADC
ADC
Divider
Divider
digital
digital
: N
: N
FSK Data
ASK Data
FSK Data
ASK Data
RX
RX
RX
RX
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