TDA5252G2 INFINEON [Infineon Technologies AG], TDA5252G2 Datasheet - Page 63

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

Figure 3-24
Component calculation: (rule of thumb)
3.6.3
The TDA5255 data output can be digital (pin 28) or in analog form by using the peak detector output
and changing some settings.
To get an analog data output the slicer must be set to lowpass mode (Reg. 0, D15 = LP = 0) and
the peak detector capacitor at pin 12 or 13 has to be changed to a resistor of about 47kOhm.
Data Sheet
C
C
p
n
≥
≥
Signal
2
2
100k
100k
⋅
⋅
T
T
L2
L1
Ω
Ω
Peak Detector - Analog output signal
Peak Detector timing
T
T
L1
L2
– longest period of no signal change (LOW signal)
– longest period of no signal change (HIGH signal)
Signal
τ
negPkD
63
τ
posPkD
Pos. Peak Detector (pin13)
Neg. Peak Detector (pin12)
Threshold SLC(pin14)
t
TDA5252 G2
Version 1.1
[3 – 35]
[3 – 34]
Application
2007-02-26
PkD_timing.wmf