SI4031-B1-FM Silicon Laboratories Inc, SI4031-B1-FM Datasheet - Page 17

• Manufacturer Part Number: SI4031-B1-FM
• Description: IC TX 240-930MHZ -8-13DB 20VQFN
• Manufacturer: Silicon Laboratories Inc
• Type: ISM Transmitterr

Specifications of SI4031-B1-FM

• Package / Case: 20-VQFN
• Frequency: 240MHz ~ 930MHz
• Applications: General Purpose
• Modulation Or Protocol: FSK, GFSK, OOK
• Data Rate - Maximum: 256 kbps
• Power - Output: 13dBm
• Current - Transmitting: 30mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 1.8 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Operating Frequency: 240 MHz to 930 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 1.8 V to 3.6 V
• Supply Current: 30 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

3.2. Operating Mode Control
There are three primary states in the Si4030/31/32 radio state machine: SHUTDOWN, IDLE, and TX (see
Figure 5). The SHUTDOWN state completely shuts down the radio to minimize current consumption. There are five
different configurations/options for the IDLE state which can be selected to optimize the chip to the applications
needs. "Register 07h. Operating Mode and Function Control 1" controls which operating mode/state is selected
with the exception of SHUTDOWN which is controlled by SDN pin 20. The TX state may be reached automatically
from any of the IDLE states by setting the txon bit in "Register 07h. Operating Mode and Function Control 1."
Table 10 shows each of the operating modes with the time required to reach TX mode as well as the current
consumption of each mode.
The Si4030/31/32 includes a low-power digital regulated supply (LPLDO) which is internally connected in parallel
to the output of the main digital regulator (and is available externally at the VR_DIG pin). This common digital
supply voltage is connected to all digital circuit blocks including the SPI and register space. The LPLDO has
extremely low quiescent current consumption but limited current supply capability; it is used only in the IDLE-
STANDBY and IDLE-SLEEP modes. The main digital regulator is automatically enabled in all other modes.
Shut Down State
Idle States:
TX State
Standby Mode
Sleep Mode
Sensor Mode
Ready Mode
Tune Mode
State/Mode
SHUT DWN
SHUTDOWN
Table 10. Operating Modes Response Time
Figure 5. State Machine Diagram
Response Time to TX
*Five Different Options for IDLE
16.8 ms
800 µs
800 µs
800 µs
200 µs
200 µs
Rev 1.1
NA
IDLE*
Current in State/Mode [µA]
85 mA @ +20 dBm,
30 mA @ +13 dBm
Si4030/31/32-B1
Si4030/31:
TX
Si4032:
450 nA
800 µA
8.5 mA
15 nA
1 µA
1 µA
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