EVB71122
300 to 930MHz Receiver
Evaluation Board Description
3.1.1
Control Word R0
Name
Bits
Description
operation mode
#default
00
01
10
11
shutdown
receive mode
OPMODE
[1:0]
reference oscillator & BIAS only
synthesizer only
LNA gain
00
01
10
11
lowest gain
low gain
high gain
(-18dB)
(-4dB)
(0dB)
LNAGAIN
[3:2]
#default
highest gain
(+2dB)
gain values are relative to gain at default
1st Mixer gain
(14dB)
(0dB)
2nd Mixer gain
MIX1GAIN
MIX2GAIN
[4]
[5]
#default
#default
0
1
high gain
low gain
0
1
high gain
low gain
(9dB)
(-2dB)
intermediate frequency filter gain
00
01
10
11
lowest gain
low gain
high gain
(-14dB)
(-6dB)
(0dB)
IFFGAIN
[7:6]
#default
highest gain
(+6dB)
demodulator gain
DEMGAIN
SSBSEL
SLCSEL
[8]
[9]
[9]
0
1
low gain
high gain
(~ 4mV/kHz)
(~ 15mV/kHz)
#default
#default
single side band selection
0
1
upper side band LO2 low-side inj. (IF1 = LO2 + IF2)
lower side band
LO2 high-side inj. (IF1 = LO2 – IF2)
Internal IF2 = 2MHz
slicer mode select
#default
#default
0
1
averaging Data Slicer mode
peak detector Data Slicer mode
data output polarity OA2
0
1
inverted
‘1’ for space at ASK or fmin at FSK, ‘0’ for mark at ASK or fmax at FSK
DTAPOL
[11]
normal
‘0’ for space at ASK or fmin at FSK, ‘1’ for mark at ASK or fmax at FSK
39012 71122 01
Rev. 001
Page 15 of 32
EVB Description
Sept/06
MELEXIS [ Melexis Microelectronic Systems ]
