ML2722
RECEIVER
ZIN
NF
Receiver RF impedance
fc=915MHz
17-j50
9
Ω
Receiver RF noise figure
Data Rate
fc=915MHz
dB
DRRX
S
FSK modulation, fdev=+/-460kHz
For better than 12.5% CER
3dB nominal
1.536
-95
770
8
Mbps
dBm
kHz
dBm
dBm
dBm
dB
Input Sensitivity
BWRX Bandwidth
PIMAX Maximum RX RF input
IIP3
<12.5% CER at 1.536Mchip/s
Test tones 2 and 4 channels away
Receiver input IP3
LO Leakage at RXI
-12
-80
35
IRR
Receive RF mixer image
rejection
Measured at 3.5MHz offset
Adjacent channel rejection
-80dBm wanted signal <12.5% CER
(a single interferer with 2GFSK
modulation to give a
-20dBc bandwidth of 1.5MHz)
1 channel
2 channels
3 or more channels
15
40
45
dB
Receiver settling time
IF FILTERS
RXON high to valid data
120
μs
fIFC
IF filter center frequency
IF filter 3dB bandwidth
After Automatic Filter Alignment
After Automatic Filter Alignment
1.024
1405
MHz
kHz
BWIF
LIMITER, AGC, AND FM DEMODULATOR
tOVLD
Recovery from overload
Eb/No
From 0dBm at input
For 12.5% CER
5
3
4
12
μs
dB
dB
Co-Channel rejection, 12.5%
CER
-80dBm, modulated with 1.536Mbps
GFSK, BT=0.5, PRBS data
AM tolerance for 12.5% or better -80dBm wanted signal, AM
90
%
CER
modulation depth at 100kHz rate
RSSI PERFORMANCE
tRRSSI
tFRSSI
RSSI rise time: < -100dBm to
-15dBm into the IF mixer
20pF load, 20% to 80%
20pF load, 20% to 80%
1
1
5.3
4.4
10
10
μs
μs
RSSI fall time: <-15dBm to
<-100dBm into the IF mixer
VRSMX RSSI maximum voltage
VRSMN RSSI minimum voltage
GRSMID RSSI sensitivity, mid range
PRSMX RSSI maximum signal
PRSMN RSSI minimum signal
RSSI accuracy
-15dBm in
No signal
2.2
2.8
0.05
35
V
V
28
42
mV/dB
dBm
dBm
V
Sensitivity is >50% mid range
Sensitivity is >50% mid range
Measured at -40dBm input power
-20
-95
1.9
1.5
2.1
DS2722-F-06
FINAL DATASHEET
DECEMBER 2005
5
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
