MLX71122_16 Datasheet, PDF (41/59 Pages) Melexis Microelectronic Systems – 300 to 930MHz FSK/FM/ASK Receiver

MLX71122
300 to 930MHz FSK/FM/ASK Receiver
Datasheet
4.1.1. Control Word R0
Name
OPMODE
LNAGAIN
MIX1GAIN
MIX2GAIN
IFFGAIN
DEMGAIN
SSBSEL
SLCSEL
DTAPOL
Bits
[1:0]
[3:2]
[4]
[5]
[7:6]
[8]
[9]
[10]
[11]
Description
operation mode
00 ^shutdown
01 receive mode
10 _{reference oscillator & BIAS only}
11 _{synthesizer only}
LNA gain
00 ^{lowest gain}
01 low gain
10 _{high gain}
11 _{highest gain}
(default – 20dB)
(default – 6dB)
(default – 2dB)
(default – 0dB)
gain values are relative to gain at default
1^st Mixer gain
0 high gain
1 _{low gain}
(14dB)
(0dB)
2^nd Mixer gain
0 high gain
1 _{low gain}
(9dB)
(-2dB)
intermediate frequency filter gain
00 ^{lowest gain}
01 low gain
10 _{high gain}
11 _{highest gain}
(-14dB)
(-6dB)
(0dB)
(+6dB)
demodulator gain
0 low gain
1 _{high gain}
(~ 12mV/kHz)
(~ 14.5mV/kHz)
single side band selection
0 upper side band LO2 low-side inj. (IF1 = LO2 + IF2)
1 lower side band LO2 high-side inj. (IF1 = LO2 – IF2)
Internal IF2 = 2MHz
slicer mode select
0 averaging Data Slicer mode
1 peak detector Data Slicer mode
data output polarity OA2
0 inverted
‘1’ for space at ASK or fmin at FSK, ‘0’ for mark at ASK or fmax at FSK
1 normal
‘0’ for space at ASK or fmin at FSK, ‘1’ for mark at ASK or fmax at FSK
#default
#default
#default
#default
#default
#default
#default
#default
#default
REVISION 014 – AUGUST, 2016
390 10 71122 01
Page 41 of 59