SI4031-B1-FM Silicon Laboratories Inc, SI4031-B1-FM Datasheet - Page 32

• 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

Si4030/31/32-B1
5.2.1. Output Power Selection
With the Si4032, the output power is configurable in 3 dB steps with the txpow[2:0] field in "Register 6Dh. TX
Power." Extra output power can allow the use of a cheaper, smaller antenna reducing the overall BOM cost. The
higher power setting of the chip achieves maximum possible range, but of course comes at the cost of higher TX
current consumption. However, depending on the duty cycle of the system, the effect on battery life may be
insignificant. Contact Silicon Labs Support for help in evaluating this tradeoff.
The +13 dBm output power of the Si4030/31 is targeted at systems that require lower output power. The PA still
offers high efficiency and a range of output power from –8 to +13 dBm.
32
Add R/W Function/Description
6D
R/W
TX Power
txpow[2:0]
txpow[2:0]
D7
000
001
010
011
100
101
110
000
001
010
011
100
101
110
111
111
D6
D5
Rev 1.1
Si4030/31 Output Power
Si4032 Output Power
D4
+14 dBm
+17 dBm
+20 dBm
+10 dBm
+13 dBm
+11 dBm
+1 dBm
+2 dBm
+5 dBm
+8 dBm
+1 dBm
+4 dBm
+7 dBm
–8 dBm
–5 dBm
–2 dBm
D3
txpow[2]
D2
txpow[1]
D1
txpow[0]
D0
POR Def.
07h