SI4022-A1-FT Silicon Laboratories Inc, SI4022-A1-FT Datasheet - Page 13

• 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

Data Rate Command
Note
Note
The bit rate of the transmitted data stream is determined by the 7-bit value R (bits r6 to r0) and the 1 bit cs.
BR = 10 MHz / 29 / (R+1) / (1 + cs*7)
In the receiver set R according the next function:
R= (10 MHz / 29 /(1 + cs*7)/ BR) – 1
Apart from setting custom values, the standard bit rates from 600 bps to 115.2 kbps can be approximated with small error.
Low Battery and Microcontroller Clock Divider Command
The 4-bit value T of t3-t0 determines the threshold voltage of the threshold voltage V
Bit 4 <elfc>:
Clock divider configuration (valid only if the crystal oscillator is on):
Wake-Up Timer Command
The wake-up time period can be calculated by M <m13 : m0> , R <r3 : r0> and D <d1 : d0>:
Note
Note:•
Note
Extended Wake-Up Timer Command
These bits can be used for further fine adjustment of the wake-up timer. The explanation of the bits can be found above.
bit
bit
bit
bit
15
15
15
15
1
1
1
1
The wake-up timer generates interrupts continuously at the programmed interval while the et bit is set.
14
14
14
1
14
1
1
1
13
Enables low frequency (32 kHz) microcontroller output clock during sleep mode.
13
13
0
13
0
0
1
12
0
12
12
12
0
0
0
11
0
11
11
11
r3
0
1
10
0
10
10
10
r2
0
0
9
1
r1
9
1
9
0
d2
9
0
0
0
0
1
1
1
1
8
0
r0
8
1
8
0
8
d1
0
0
1
1
0
0
1
1
d2
7
m7
d1
cs
7
7
7
d0
0
1
0
1
0
1
0
1
d1
6
m6
d0
r6
6
6
6
V
T
wake-up
lb
= 2.0 V + T * 0.1 V
d0
Frequency [MHz]
5
m13 m12 m11 m10
m5
r5
5
5
5
= M * 2
Clock Output
elfc
4
m4
r4
4
4
4
R-D
1.25
1.66
3.33
t3
3
2.5
10
m3
r3
ms
3
1
2
5
3
3
lb
t2
2
of the detector:
m2
r2
2
2
2
t1
1
m1
m9
r1
1
1
1
t0
0
m0
m8
r0
0
0
0
C213h
POR
C813h
C300h
E196h
POR
POR
POR
Si4022
13