TDA5252G2 Datasheet, PDF (62/86 Pages) Infineon Technologies AG – ASK/FSK 915MHz Wireless Transceiver

3.6.2 Peak Detectors
TDA5252 G2
Version 1.1
Application
Table 3-13
Bit
D15
Sub Address 00H: CONFIG
Function
Description
SLICER
0= LP, 1= Peak Detector
Default
SET
0
1
The TDA5252 has two peak detectors built in, one for positive peaks in the data stream and the
other for the negative ones.
Necessary external components:
- Pin12: C_N
- Pin13: C_P
SLC_PkD.wmf
Figure 3-23 Slicer Level using Peak Detector
For applications requiring fast attack and slow release from the threshold value it is reasonable to
use the peak detectors. The threshold value is generated by an internal voltage divider. The release
time is defined by the internal resistance values and the external capacitors.
τ _posPkD = 100 k Ω ⋅ C _p
[3 – 32]
τ _negPkD = 100 k Ω ⋅ C _n
[3 – 33]
Data Sheet
62
2007-02-26