si4420 Silicon Laboratories, si4420 Datasheet - Page 8

• Manufacturer Part Number: si4420
• Description: Si4420 Universal Ism Band Fsk Transceiver
• Manufacturer: Silicon Laboratories

AC Characteristics (PLL parameters)
AC Characteristics (Receiver)
All notes for tables above are on page 10.
Symbol
f
f
t
t
Symbol
BW
BR
BRA
P
AFC
IIP3
IIP3
IIP3
IIP3
P
Cin
RS
RS
C
RS
RS
ref
o
lock
st, P
min
max
ARSSI
a
r
step
resp
inh
outh
inl
outl
range
Parameter
PLL reference frequency
Receiver LO/Transmitter
carrier frequency
PLL lock time
PLL startup time
Parameter
Receiver bandwidth
FSK bit rate
FSK bit rate
Receiver Sensitivity
AFC locking range
Input IP3
Input IP3
IIP3 (LNA –6 dB gain)
IIP3 (LNA –6 dB gain)
Maximum input power
RF input capacitance
RSSI accuracy
RSSI range
Filter capacitor for ARSSI
RSSI programmable level
steps
DRSSI response time
Conditions/Notes
(Note 1)
315 MHz band, 2.5 kHz resolution
433 MHz band, 2.5 kHz resolution
868 MHz band, 5.0 kHz resolution
915 MHz band, 7.5 kHz resolution
Frequency error < 1kHz
after 10 MHz step
With a running crystal oscillator
Conditions/Notes
mode 0
mode 1
mode 2
mode 3
mode 4
mode 5
With internal digital filters
With analog filter
BER 10
df
In band interferers in high bands (868, 915 MHz)
Out of band interferers
l f-f
In band interferers in low bands (315, 433 MHz)
Out of band interferers
l f-f
LNA: high gain
Until the RSSI signal goes high after the input signal
exceeds the preprogrammed limit C
FSK
o
o
l > 4 MHz
l > 4 MHz
: FSK deviation in the received signal
-3
, BW=67 kHz, BR=1.2 kbps (Note 2)
ARRSI
= 5 nF
Min
310.24
430.24
860.48
900.72
Min
120
180
240
300
360
0.6
60
0
1
8
Typ
0.8*df
Typ
-109
+/-5
134
200
270
350
400
500
10
20
-21
-18
-15
-12
67
46
1
6
FSK
Max
319.75
439.75
879.51
929.27
Max
250
115.2
12
-100
150
225
300
375
450
256
75
Si4420
Units
MHz
MHz
Units
kbps
kbps
dBm
dBm
dBm
dBm
dBm
dBm
µs
µs
kHz
pF
dB
dB
nF
dB
µs
8