TDA5230XT Infineon Technologies, TDA5230XT Datasheet - Page 84

• 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

The higher the output of ASKNP, the better the reliability of the related data bit. The
signal detector uses this value to distinguish between acceptable data and unacceptable
data (e.g. noise).
Figure 41
The polarity of the Manchester code can be inverted by setting the SFR control bit
DATINV.
Signal and Noise Detector
The Signal and the Noise Detector compare the outputs of ASKNP and FSKNP (see
FSK Demodulator) with configurable thresholds.
The Signal Detection Mode must be configured based on whether ASK or FSK
modulation is used:
•
•
•
•
Data Sheet
Signal power detection (=Squelch) only (related registers SIGDET0, SIGDET1 and
ASKNP). This mode is generally used for ASK and recommended for FSK.
Noise power detection only (related registers NDTHRES and FSKNP).
Signal and noise power detection simultaneously.
Signal and noise power detection simultaneously, but the FSK noise detect signal is
valid only if the SIGDETLO threshold is exceeded. This is the recommended FSK
mode, if minimum FSK Deviation is not sufficient to use signal power detection only.
limiter
from
MUX
from
f
f
sys
sys
Matched Filter, Signal/Noise Detection and Slicer units
matched
power
meter
noise
FSK
filter
T
nom
/ 16
signal power meter
T
nom
/ 16
signal power
threashold
detector
register
shift
+
enable
delayed
data
80
data
data
threshold
T
nom
/ 16
data slicer
(+1 0 -1)
T
nom
Functional Description
clock recovery
/ 16
Version 4.0, 2007-06-01
slicer
chip data
decoder
recovery
to clock
recovered
framer
clock
TDA523x
to