ML2724
SYMBOL PARAMETER
fFREF Reference signal frequency
CONDITIONS
MIN
TYP
MAX
UNITS
6.144
MHz
MHz
12.288
VFREF
Reference signal input level
6.144MHz or 12.288MHz sine wave,
capacitively coupled
2.0
VCCA
VPP
RECEIVER
ZIN
NF
Receiver input impedance
Receiver noise figure
Data Rate
fc=2445MHz
2.2+j0
16.5
Ω
dB
fc=2445MHz
DRRX
S
FSK modulation, fdev=+/-512kHz
1.536
Mbps
Input Sensitivity
<12.5% CER at 1.536Mchip/s
<0.1% BER at 1.536Mbps
-82
-90
-81
dBm
dBm
BWRX
PIMAX
Bandwidth
3dB Bandwidth
770
kHz
Maximum RX RF input
<12.5% CER at 1.536Mchip/s
<0.1% BER at 1.536Mb/s
+5
-4
dBm
dBm
IIP3
Receiver Input IP3
Test tones 2 and 4 channels away
-15
-60
35
dBm
dBm
dB
LO leakage at RXI
IRR
Mixer Image Rejection Ratio
Adjacent channel rejection
Measured at 3.5MHz offset
-80dBm wanted signal <10-3 BER
Single 2GFSK modulated interferer
with a 1.5MHz –20dBc bandwidth
6
dB
dB
dB
1 channel away
2 channels away
3 or more channels away
31
36
IF FILTERS
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 +15dBm at input
For 0.1% BER
5
12
μs
dB
dB
10.5
10.5
Co-Channel rejection, 0.1% BER
-80 dBm, modulated with
1.536Mbps GFSK, BT=0.5, PRBS
data
VODC
VOPK
VOL
Quiescent voltage @ AOUT
Output voltage swing AOUT
AOUT open-drain voltage
1.1
V
VPP
V
0.55
1.1
0.4
IO=100μA, TPC Mode
RSSI PERFORMANCE
tRRSSI RSSI rise time No Signal to
20pF load, 20% to 80%
20pF load, 20% to 80%
4.5
3.0
μs
μs
-15dBm into the IF mixer
tFRSSI
RSSI fall time, < -15dBm to
No Signal into the IF mixer
GRSMID
VRSMX
VRSMD
RSSI sensitivity
(V-40dBm – V-60dBm)/20dB
See Figure 3
28
1.8
1.4
36
2.3
1.7
42
mV/dB
RSSI maximum voltage
RSSI midrange voltage
V
V
-40dBm into RXI
2.0
DS2724-F-03
FINAL DATASHEET
DECEMBER 2005
5