si4420 Silicon Laboratories, si4420 Datasheet - Page 9

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

AC Characteristics (Transmitter)
AC Characteristics (Turn-on/Turnaround timings)
AC Characteristics (Others)
All notes for tables above are on page 10.
Symbol
I
P
P
P
C
Q
L
BR
df
Symbol
t
T
T
T
T
Symbol
C
t
t
C
t
OUT
sx
POR
PBt
r, f
out
max
out
sp
tx_rx_XTAL_ON
rx_tx_XTAL_ON
tx_rx_SYNT_ON
rx_tx_SYNT_ON
o
xl
in, D
o
fsk
Parameter
Open collector output DC current
Available output power with optimal
antenna impedance
(Note 3, 4)
Typical output power
Spurious emission
Output capacitance
(set by the automatic antenna tuning
circuit)
Quality factor of the output
capacitance
Output phase noise
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 - Receiver turnover time
Receiver - Transmitter turnover time
Transmitter - Receiver turnover time
Receiver - Transmitter turnover time
Conditions/Notes
Programmable
In low bands
In high bands
Selectable in 2.5 dB steps (Note 5)
At max power with loop antenna
(Note 6)
In low bands
In high bands
In low bands
In high bands
100 kHz from carrier
1 MHz from carrier
Programmable in 15 kHz steps
Conditions/Notes
Programmable in 0.5 pF steps, tolerance
+/- 10%
After V
(Note 7)
Crystal oscillator must be enabled to
ensure proper calibration at startup
(Note 8)
15 pF pure capacitive load
Conditions/Notes
Crystal ESR < 100 (Note 8)
Synthesizer off, crystal oscillator on during
TX/RX change with 10 MHz step
Synthesizer off, crystal oscillator on during
RX/TX change 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
dd
has reached 90% of final value
Min
P
max
0.5
2.1
13
15
Min
Min
2
8
-21
8.5
Typ
Typ
Typ
2.6
2.7
-75
-85
+/-10
15
10
8
4
450
350
425
300
1
Max
P
256
240
-50
Max
Max
3.2
3.3
17
12
6
max
150
10
16
5
2
Si4420
Units
dBc/Hz
kbps
Units
Units
dBm
dBm
dBc
kHz
mA
pF
ms
ms
µs
µs
pF
pF
ns
µs
µs
%
9