SI4421-A0-FT Silicon Laboratories Inc, SI4421-A0-FT Datasheet - Page 11

• 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 (Transmitter)
AC Characteristics (Turn-on/Turnaround timings)
AC Characteristics (Others)
Notes are on page 12.
T
T
T
T
tx_rx_SYNT_ON
rx_tx_SYNT_ON
Symbol
Symbol
Symbol
P
P
BRA
rx_XTAL_ON
tx_XTAL_ON
BR
P
I
df
C
t
max_ant
P
t
max_50
P
L
t
Q
C
C
OUT
POR
r
t
harm
PBt
, t
out
out
sx
inD
sp
fsk
xl
o
o
TX
TX
f
Parameter
Open collector output DC current
Max. output power delivered to 50
Ohm load over a suitable matching
network (Note 4)
Max. EIRP with suitable selected
PCB antenna (Note 6)
Typical output power
Spurious emission
l f-f
Harmonic suppression
Output capacitance (set by the
automatic antenna tuning circuit)
Quality factor of the output
capacitance
Output phase noise
FSK bit rate
FSK bit rate
FSK frequency deviation
Parameter
Crystal load capacitance,
see crystal selection guide
Internal POR timeout
Wake-up timer clock accuracy
Digital input capacitance
Digital output rise/fall time
Parameter
Crystal oscillator startup time
Transmitter turn-on time
Receiver turn-on time
Transmitter – Receiver turnover time
Receiver – Transmitter turnover time
sp
l > 1 MHz
Conditions/Notes
Programmable
In 433 MHz band
In 868 MHz / 915 MHz bands
In 433 MHz band with monopole antenna
with matching network (Note 4)
In 868 MHz / 915 MHz bands (Note 5)
Selectable in 2.5 dB steps (Note 7)
At max power 50 Ohm load (Note 4)
With PCB antenna (Note 5)
At max power 50 Ohm load (Note 4)
With PCB antenna (Note 5)
In 433 MHz band
In 868 MHz / 915 MHz bands
In 433 MHz band
In 868 MHz / 915 MHz bands
100 kHz from carrier, in 868 MHz band
1 MHz from carrier, in 868 MHz band
Via internal TX data register
TX data connected to the FSK input
Programmable in 15 kHz steps
Conditions/Notes
Programmable in 0.5 pF steps, tolerance
± 10%
After V
(Note 8)
Crystal oscillator must be enabled to
ensure proper calibration at the start up.
(Note 9)
15 pF pure capacitive load
Conditions/Notes
Default capacitance bank setting, crystal
capacitance = 16 pF.
Synthesizer off, crystal oscillator on with
10 MHz step
Synthesizer off, crystal oscillator on with
10 MHz step
Synthesizer and crystal oscillator on
during TX/RX change with 10 MHz step
Synthesizer and crystal oscillator on
during RX/TX change with 10 MHz step
ESR < 50 Ohm (Note 9). Crystal load
dd
has reached 90% of final value
P
max
Min
Min
8.5
Min
0.5
2.1
13
15
2
8
-17.5
± 10
Typ
Typ
250
250
150
150
-103
Typ
2.6
2.7
-80
15
10
2
7
5
7
7
Max
P
Max
Max
172
256
240
100
-55
-60
-35
-42
3.2
3.3
17
12
16
10
6
max
2
7
Si4421
dBc/Hz
Units
Units
Units
dBm
dBm
dBm
kbps
kbps
dBc
dBc
kHz
mA
ms
pF
ms
pF
pF
ns
µs
µs
µs
µs
%
11