EVB71120
300 to 930MHz Receiver
Evaluation Board Description
1.4
Operating Modes
ENRX
0
1
Note:
ENRX is pulled down internally.
Description
Shutdown mode
Receive mode
1.5
Frequency Range
Two different receive frequency ranges can be selected by the control signal RFSEL.
RFSEL
0
1
Description
Input frequency range 300 to 470MHz
Input frequency range 610 to 930MHz
1.6
LNA Selection
LNASEL
0
Hi-Z
1
LNA1 shutdown, LNA2 active
Note: Hi-Z state means pin LNASEL is left floating (pin is internally pulled to V
CC
/2 in this case).
1.7
External IF2 Selection
IFSEL
0
1
Y
R
A
IN
IM
L
E
R
P
LNA1 active, LNA2 shutdown
LNA1 and LNA2 active
Description
IF2 = 455 kHz
IF2 = 10.7 MHz
Description
ASK demodulation
FSK demodulation
Description
1.8
Demodulation Selection
MODSEL
0
1
1.9
Data Slicer
SLCSEL
0
1
Description
Averaging detection mode
Peak detection mode
39012 71120 01
Rev. 003
Page 5 of 18
EVB Description
Jan/08
MELEXIS [ Melexis Microelectronic Systems ]
