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Si4322
AC Characteristics
Symbol
f LO
Parameter
Receiver frequency
Conditions/Notes
868 MHz band, 20 kHz resolution
915 MHz band, 20 kHz resolution
Min
801.92
881.92
Typ
Max
878.06
958.06
Units
MHz
mode 1
mode 2
120
180
134
200
150
225
BW
Receiver bandwidth
mode 3
240
270
300
kHz
mode 4
mode 5
300
360
350
400
375
450
BR
BRA
P min
AFC range
IIP3 inh
IIP3 outh
CCR
FSK bit rate
FSK bit rate
Receiver sensitivity
AFC locking range
Input IP3
Input IP3
Co-channel rejection
with internal digital filters
with analog filter
BER 10 -3 , BW = 134 kHz,
BR = 9.6 kbps
δ f FSK : FSK deviation in the
received signal
in band interferers
out of band interferers
f-f LO > 4MHz
BER = 10 -2 with continuous wave
interferer in the channel
-104
0.8* δ f FSK
-21
-18
-4
115.2
256
kbps
kbps
dBm
dBm
dBm
dB
BER = 10 with continuous wave
-2
BR 1MHz
Blocking ratio
interferer, BW = 134 kHz,
BR = 9.6 kbps, δ f FSK = 80 kHz,
46
dB
interferer offset 1 MHz
BR 2MHz
BR 5MHz
BR 10MHz
P max
Rin
Cin
RS a
RS r
C ARSSI
RS step
RS resp
Blocking ratio
Blocking ratio
Blocking ratio
Maximum input power
RF input impedance real part
(differential) (Note 1)
RF input capacitance
RSSI accuracy
RSSI range
Filter capacitance for ARSSI
RSSI programmable level
steps
DRSSI response time
same as above,
interferer offset 2 MHz
same as above,
interferer offset 5 MHz
same as above,
interferer offset 10 MHz
LNA: high gain
LNA gain (0, -12dB)
LNA gain (-6, -18dB)
until the RSSI output goes high
after the input signal exceeds the
0
1
49
55
67
250
500
1
+/-5
46
6
500
dB
dB
dB
dBm
Ohm
pF
dB
dB
nF
dB
μ s
pre-programmed limit, C ARRSI = 5nF
Not e 1:
See matching circuit parameters and antenna design guide for information, and Application Notes available from http://
www.silabs.com.
6
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