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参数资料
| 型号： | 4421-DKDB2 |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 11/45页 |
| 文件大小： | 0K |
| 描述： | KIT DEV TEST EZRADIO SI4421 TRX |
| 标准包装： | 1 |
| 附件类型： | 测试卡，收发器，434MHz |
| 适用于相关产品： | EZRadio? |
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Si4421
AC Characteristics (Transmitter)
Symbol
I OUT
P max_50
P max_ant
P out
P sp
P harm
C o
Q o
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 sp l > 1 MHz
Harmonic suppression
Output capacitance (set by the
automatic antenna tuning circuit)
Quality factor of the output
capacitance
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
Min
0.5
P max -17.5
2
2.1
13
8
Typ
7
5
7
7
2.6
2.7
15
10
Max
6
P max
-55
-60
-35
-42
3.2
3.3
17
12
Units
mA
dBm
dBm
dBm
dBc
dBc
pF
L out
BR TX
BRA TX
Output phase noise
FSK bit rate
FSK bit rate
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
-80
-103
172
256
dBc/Hz
kbps
kbps
df fsk
FSK frequency deviation
Programmable in 15 kHz steps
15
240
kHz
AC Characteristics (Turn-on/Turnaround timings)
Symbol
Parameter
Conditions/Notes
Min
Typ
Max
Units
Default capacitance bank setting, crystal
t sx
T tx_XTAL_ON
T rx_XTAL_ON
T tx_rx_SYNT_ON
T rx_tx_SYNT_ON
Crystal oscillator startup time
Transmitter turn-on time
Receiver turn-on time
Transmitter – Receiver turnover time
Receiver – Transmitter turnover time
ESR < 50 Ohm (Note 9). Crystal load
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
2
250
250
150
150
7
ms
μs
μs
μs
μs
AC Characteristics (Others)
Symbol
C xl
t POR
Parameter
Crystal load capacitance,
see crystal selection guide
Internal POR timeout
Conditions/Notes
Programmable in 0.5 pF steps, tolerance
± 10%
After V dd has reached 90% of final value
(Note 8)
Min
8.5
Typ
Max
16
100
Units
pF
ms
Crystal oscillator must be enabled to
t PBt
C inD
Wake-up timer clock accuracy
Digital input capacitance
ensure proper calibration at the start up.
(Note 9)
± 10
2
%
pF
t r , t f
Digital output rise/fall time
15 pF pure capacitive load
10
ns
Notes are on page 12.
11
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