TDA5252G2 INFINEON [Infineon Technologies AG], TDA5252G2 Datasheet - Page 61

• Manufacturer Part Number: TDA5252G2
• Description: ASK/FSK 915MHz Wireless Transceiver
• Manufacturer: INFINEON [Infineon Technologies AG]

3.6
The data slicer is an analog-to-digital converter. It is necessary to generate a threshold value for the
negative comparator input (data slicer). The TDA5255 offers an RC integrator and a peak detector
which can be selected via logic. Independent of the choice, the peak detector outputs are always
active.
3.6.1
Table 3-12
Necessary external component (Pin14): C
This integrator generates the mean value of the data filter output. For a stable threshold value, the
cut-off frequency has to be lower than the lowest signal frequency. The cutoff frequency results from
the internal resistance R=100k Ω and the external capacitor C
Cut-off frequency:
Component calculation: (rule of thumb)
T
Figure 3-22
Data Sheet
L
D15
Bit
– longest period of no signal change
Data Slicer - Slicing Level
RC Integrator
Sub Address 00H: CONFIG
Function
SLICER
Slicer Level using RC Integrator
C
f
SLC
cut
−
≥
off
100
=
3
0= LP, 1= Peak Detector
2
⋅
T
k
π
L
Ω
⋅
100
SLC
Description
1
k
Ω
61
⋅
C
SLC
<
Min
{
f
SLC
Signal
on Pin14.
}
Default
0
TDA5252 G2
Version 1.1
Application
[3 – 30]
[3 – 31]
2007-02-26
SET
0
SLC_RC.wmf