TDA5250D2_07 Datasheet, PDF (68/94 Pages) Infineon Technologies AG – ASK/FSK 868MHz Wireless Transceiver

TDA5250 D2
Version 1.7
Application
Figure 3-29 Peak detector - power down mode
Signal
Vcc
Neg. Peak Detector (pin12)
Data Signal
PKD_PWDN.wmff
Threshold (pin14)
2,2ms
0
Pos. Peak Detector (pin13)
Power ON
Power Down
Power ON
Peak Detector Power ON
t
Figure 3-30 Power down mode
PkD_PWDN3.wmf
3.7
Data Valid Detection
In order to detect valid data two criteria must be fulfilled.
One criteria is the data rate, which can be set in register 06h and 07h. The other one is the received
RF power level, which can be set in register 08h in form of the RSSI threshold voltage. Thus for
using the data valid detection FSK modulation is recommended.
Data Sheet
68
2007-02-26