SI4022-A1-FT Silicon Laboratories Inc, SI4022-A1-FT Datasheet - Page 11

• Manufacturer Part Number: SI4022-A1-FT
• Description: IC TX FSK 915MHZ 3.8V 16-TSSOP
• Manufacturer: Silicon Laboratories Inc
• Type: ISM Band FSK Transmitterr

Specifications of SI4022-A1-FT

• Package / Case: 16-TSSOP
• Frequency: 868MHz, 915MHz
• Applications: ISM
• Modulation Or Protocol: FSK
• Data Rate - Maximum: 115.2kbps
• Power - Output: 6dBm
• Current - Transmitting: 24mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.2 V ~ 3.8 V
• Operating Temperature: -40°C ~ 85°C
• Operating Frequency: 434 MHz to 915 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 2.5 V, 3.3 V
• Supply Current: 24 mA
• Supply Voltage (max): 3.8 V
• Supply Voltage (min): 2.2 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 336-1623-5

Note
Note
Frequency Setting Command
Power Management Command
Bit 5 <ex>:
Bit 4 <es>:
Bit 3 <etr>:
Bit 2 <eb>:
Bit 1 <et>:
Bit 0 <dc>:
Note
Note:
Note
Power Saving Modes
The different operating modes of the chip depend on the following control bits:
Transmitter FIFO Write Command
With this command, the controller can write databits to the transmitter FIFO. Bit (fe) must be set in the FIFO Setting Command.
Bit
bit
bit
The 12-bit parameter of the Frequency Setting
Command <f11 : f0> has the value F. The value F
should be in the range of 96 and 3903. When F is out
of range, the previous value is kept. The synthesizer
center frequency f
15
15
7
1
1
1
If faster operation is needed, then leave ex and es bit set to ‘1’ and toggle only the etr bit.
14
14
6
1
f
1
0
0
= 8 * 10 MHz * (C + F/4000)
Enables the the crystal oscillator.
Enables the synthesizer.
Enables the power amplifier. If the ex and es bit is not set, it switches on the crystal oscillator and the
synthesizer as well.
In FIFO mode (bit fe is set in the FIFO Setting Command) setting this bit will roll out the content of the FIFO.
Enables the low battery detector.
Enables the wake-up timer.
Disables the clock output buffer.
13
13
5
0
0
1
0
can be calculated as:
Operating Mode
12
12
0
4
0
0
Active (transmit)
Standby
f11
11
11
Sleep
3
0
0
Idle
f10
10
10
2
1
0
f9
1
1
9
0
9
eb or et
f8
0
8
0
0
8
X
X
1
0
f7
7
0
7
POR
f6
The constant C is determined by
the selected band as:
6
6
0
-
Band [MHz]
es
868
915
0
0
0
ex
x
f5
5
5
es
f4
4
4
etr
f3
3
3
etr
1
0
0
0
10
11
C
eb
f2
2
2
et
f1
1
1
ex
x
1
0
0
dc
f0
0
0
AD57h
C002h
POR
POR
Si4022
11