TDA5230XT Infineon Technologies, TDA5230XT Datasheet - Page 89
TDA5230XT
Manufacturer Part Number
TDA5230XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.TDA5230XT.pdf
(186 pages)
Specifications of TDA5230XT
Operating Temperature (min)
-40C
Operating Temperature (max)
105C
Operating Temperature Classification
Industrial
Product Depth (mm)
4.4mm
Product Length (mm)
9.7mm
Lead Free Status / Rohs Status
Compliant
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2.4.10
Figure 43
The Digital FSK Demodulator has three major units:
•
•
•
Digital Down Converter
The output signal of the limiter amplifier at an IF-center-frequency from 10.7 MHz is
converted to near baseband by an I/Q mixer, driven from a programmable Direct Digital
Synthesizer.
The programming of the Direct Digital Synthesizer is done with the registers FSKNCO0,
FSKNCO1 and FSKNCO2.
NCO value calculation:
TDA5230:
For Lo-Side LO Injection mode operation:
Data Sheet
IF-Limiter
Digital Down Converter
CIC Filter
Demodulator
from
Digital FSK Demodulator
DIGITAL-DOWN-CONVERTER
Digital FSK Demodulator
Direct Digital
Synthesizer
Q
I
85
Filter
Decimator
Decimator
NCO
CIC
CIC
dec
=
Q
round
I
Demodulator
DAM
2
Functional Description
24
*
Version 4.0, 2007-06-01
f
SYS
4
−
(
f
f
SYS
SYS
TDA523x
−
f
IF
to
Digital-
Receiver
)
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