MLX71122_16 datasheet(41/59 Pages) MELEXIS

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MLX71122

300 to 930MHz FSK/FM/ASK Receiver

Datasheet

REVISION 014 – AUGUST, 2016

Page 41 of 59

390 10 71122 01

4.1.1. Control Word R0

Name

Bits

Description

OPMODE

[1:0]

operation mode

shutdown

receive mode

reference oscillator & BIAS only

synthesizer only

#default

LNAGAIN

[3:2]

LNA gain

lowest gain

low gain

high gain

highest gain

(default – 20dB)

(default – 6dB)

(default – 2dB)

(default – 0dB)

#default

gain values are relative to gain at default

MIX1GAIN

[4]

st Mixer gain

high gain

low gain

(14dB)

(0dB)

#default

MIX2GAIN

[5]

nd Mixer gain

high gain

low gain

(9dB)

(-2dB)

#default

IFFGAIN

[7:6]

intermediate frequency filter gain

lowest gain

low gain

high gain

highest gain

(-14dB)

(-6dB)

(0dB)

(+6dB)

#default

DEMGAIN

[8]

demodulator gain

low gain

high gain

(~ 12mV/kHz)

(~ 14.5mV/kHz)

#default

SSBSEL

[9]

single side band selection

upper side band

lower side band

LO2 low-side inj. (IF1 = LO2 + IF2)

LO2 high-side inj. (IF1 = LO2 – IF2)

#default

Internal IF2 = 2MHz

SLCSEL

[10]

slicer mode select

averaging Data Slicer mode

peak detector Data Slicer mode

#default

DTAPOL

[11]

data output polarity OA2

inverted

#default

‘1’ for space at ASK or fmin at FSK, ‘0’ for mark at ASK or fmax at FSK

normal

‘0’ for space at ASK or fmin at FSK, ‘1’ for mark at ASK or fmax at FSK

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