TDA5250D2 Datasheet, PDF (75/97 Pages) Infineon Technologies AG – ASK/FSK 868MHz Wireless Transceiver

confidential
TDA 5250 D2
preliminary
Applications
4.7.2 RSSI threshold voltage - RF input power
The RF input power level is corresponding to a certain RSSI voltage, which can
be seen in Section 4.5. The threshold TH3 of this RSSI voltage can be
calculated with the following formula:
TH3
desired
=
RSSI threshold
1.2V
voltage _{⋅ ( 2 6 − 1 )}
[4 – 39]
As an example a desired RSSI threshold voltage of 500mV results in
TH3~26=011010_b, which has to be written into D0 to D5 of the RSSI_TH3
register (sub address 08H).
Default value (RSSI detection inactive):
TH3=111111_b
Wireless Components
4 - 35
Specification, July 2002