SI4420-D1-FT Silicon Laboratories Inc, SI4420-D1-FT Datasheet - Page 13

• Manufacturer Part Number: SI4420-D1-FT
• Description: IC TXRX FSK 915MHZ 5.4V 16-TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4420-D1-FT

• Package / Case: 16-TSSOP
• Frequency: 315MHz, 433MHz, 868MHz, and 915MHz
• Data Rate - Maximum: 256kbps
• Modulation Or Protocol: FSK
• Power - Output: -21dbm
• Sensitivity: -109dBm
• Voltage - Supply: 2.2 V ~ 5.4 V
• Current - Receiving: 15mA
• Current - Transmitting: 26mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Number Of Receivers: 2
• Number Of Transmitters: 2
• Wireless Frequency: 315 MHz to 915 MHz
• Interface Type: SPI
• Output Power: 4 dBm to 8 dBm
• Operating Supply Voltage: 2.2 V to 5.4 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 25 mA
• Minimum Operating Temperature: - 40 C
• Modulation: FSK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1630-5

2. Power Management Command
The ebb, es, and ex bits are provided to optimize the TX to RX or RX to TX turnaround time.
Logic connections between power control bits:
Bit
Bit
er
ebb
et
es
ex
eb
ew
dc
15
1
ebb
es
ex
er
et
Function of the control bit
Enables the whole receiver chain
The receiver baseband circuit can be separately switched on
Switches on the PLL, the power amplifier, and starts the
transmission (If TX register is enabled)
Turns on the synthesizer
Turns on the crystal oscillator
Enables the low battery detector
Enables the wake-up timer
Disables the clock output (pin 8)
14
0
Edge
detector
13
0
(If TX latch is used)
12
0
(synt. must be on)
enable baseband
power amplifier
clear TX latch
(osc.must be on)
RF synthesizer
RF front end
start TX
oscillator
enable
enable
circuits
enable
enable
11
0
10
0
9
1
8
0
er
7
ebb
6
et
5
Related blocks
RF front end, baseband, synthesizer, oscillator
Baseband
Power amplifier, synthesizer, oscillator
Synthesizer
Crystal oscillator
Low battery detector
Wake-up timer
Clock output buffer
es
4
ex
3
eb
2
ew
1
dc
0
8208h
POR
Si4420
13