TDA5230XT Infineon Technologies, TDA5230XT Datasheet - Page 89

• Manufacturer Part Number: TDA5230XT
• Manufacturer: Infineon Technologies

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

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
)




