TDA5230XT Infineon Technologies, TDA5230XT Datasheet - Page 93

• 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

Dual:
ADDR:
Dual:
ADDR:
Dual:
ADDR:
Noise Detector:
To decide whether there is a data signal or simply noise at the output of the demodulator,
there is a noise detector implemented. The principle is based on a power measurement
of the demodulated signal. The current noise power is stored in the FSKNP register and
is updated at every SPI controller access.
The Noise Detector is useful if data signal is transmitted with small FSK deviations.
Further information about the use of the Noise Detector is found in
Filter and Signal
2.4.11
The Clock Recovery uses the peak from the matched filter as reference and generates
the recovered clock. The second main functionality is the generation of the symbol
synchronization found indication. This generally happens within the first 4 bits.
Data Sheet
7:4
3:0
7:0
3:0
Bit R/W Description
Bit R/W Description
Bit R/W Description
AFSKDEMBW0
W
W
AFSKDEMBW1
W
AFSKDEMBW2
W
0x7D
0x7E
0x7F
Clock Recovery
not used
DAMDLY: FSK Demodulator Sensitivity
use 0100b
DAMDEC: FSK DAM Decimation
DAMSCA: FSK DAM Output Scaling
and
and
and
Detection.
0x9F
0x9E
0x9D
and BFSKDEMBW0:
and BFSKDEMBW1:
and BFSKDEMBW2:
89
FSK DAM Output Decimation
FSK DAM Output Scaling
FSK Demodulator Sensitivity
Functional Description
Reset Value: 0x00
Reset Value: 0x00
Reset Value: 0x00
Chapter 2.4.9.2 Data
Version 4.0, 2007-06-01
TDA523x