MLX71121
300 to 930MHz
FSK/OOK Receiver
39010 71121 Page 23 of 29 Data Sheet
Rev. 012 Mar/15
4.4 AC System Characteristics
all parameters under normal operating conditions, unless otherwise stated;
typical values at T
A
= 23 °C and V
CC
= 3 V, all parameters based on test circuits as shown Fig. 11
Parameter Symbol Condition Min Typ Max Unit
Receive Characteristics
Input Sensitivity 1)
MODSEL RFSEL
FSK
315MHz
P
min1
1
0
-107
dBm
433MHz
P
min2
-107
868MHz
P
min3
1
-104
915MHz
P
min4
-102
OOK
315MHz
P
min5
0
0
-112
dBm
433MHz
P
min6
-112
868MHz
P
min7
1
-108
915MHz
P
min8
-105
Maximum input signal – FSK
P
max, FSK
MODSEL=1
-10
dBm
Maximum input signal – OOK
P
max, OOK
MODSEL=0, M>70dB
-10
dBm
Spurious emission P
spur
-54 dBm
Image rejection 1
st
IF IR
1
w/o SAW filter 20 dB
Image rejection 2
nd
IF IR
2
25 dB
LNA Parameters
Voltage gain G
LNA
depends on external
LC tank
18 dB
IF Filter Parameters
Center frequency f
cent
1.8 MHz
3dB bandwidth B
3dB
300 kHz
40dB bandwidth B
40dB
1.4 MHz
IF Amplifier / RSSI
Operating frequency f
IFA
0.4 11 MHz
RSSI usable range DR
RSSI
continuous range 45 55 dB
RSSI slope S
RSSI
20 mV/dB
FSK Demodulator
Input frequency range f
DEM
1.8 MHz
Carrier acceptance range ∆f
DEM
±80 kHz
Demodulator sensitivity S
DEM
5
mV/
kHz
1) at 4kbps NRZ, BER 310
-3
, peak detector data slicer, LNASEL = 0 or 1