SI4421-A0-FT Silicon Laboratories Inc, SI4421-A0-FT Datasheet - Page 10

• Manufacturer Part Number: SI4421-A0-FT
• Description: IC TXRX FSK 915MHZ 3.8V 16-TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4421-A0-FT

• Frequency: 433MHz, 868MHz, 915MHz
• Data Rate - Maximum: 256kbps
• Modulation Or Protocol: FSK
• Applications: ISM
• Power - Output: 7dbm
• Sensitivity: -110dBm
• Voltage - Supply: 2.2 V ~ 3.8 V
• Current - Receiving: 15mA
• Current - Transmitting: 28mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1737-5

AC Characteristics (PLL parameters)
AC Characteristics (Receiver)
Notes are on page 12.
Symbol
Symbol
AFC
BRA
IIP3
IIP3
IIP3
C
RS
RS
IIP3
BR
P
RS
P
P
RS
BW
RS
t
Cin
t
f
ARSSI
sp_rx
f
lock
stP
ref
max
min
o
step
resp
RX
range
outh
outl
ps
inh
a
RX
inl
r
Parameter
PLL reference frequency
Receiver LO/Transmitter carrier
frequency
PLL lock time
PLL startup time (Note 10)
Parameter
Receiver bandwidth
FSK bit rate (Note 10)
FSK bit rate (Note 10)
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
RSSI power supply dependency
Filter capacitor for ARSSI
RSSI programmable level steps
DRSSI response time
Receiver spurious emission
Conditions/Notes
(Note 2)
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
868 MHz Band (Note 3)
δf
signal
In band interferers in high bands
(868 MHz, 915 MHz)
Out of band interferers l f-f
In band interferers in low band (433
MHz)
Out of band interferers l f-f
LNA: high gain
When input signal level lower than -54
dBm and greater than -100 dBm
Until the RSSI signal goes high after
the input signal exceeds the
preprogrammed limit C
FSK
: FSK deviation in the received
-3
, BW=67 kHz, BR=1.2 kbps,
ARRSI
o
o
l > 4 MHz
l > 4 MHz
= 4.7 nF
430.24
860.48
900.72
Min
Min
0.6
0
1
9
0.8·δf
-110
Typ
134
200
270
340
400
+35
500
Typ
-21
-18
-15
-12
± 6
200
67
46
10
30
1
6
FSK
439.75
879.51
929.27
115.2
Max
Max
256
-60
300
11
Si4421
Units
mV/V
Units
kbps
kbps
dBm
dBm
dBm
dBm
dBm
dBm
dBm
MHz
MHz
kHz
pF
dB
dB
nF
dB
µs
µs
µs
10