SI1011-A-GM Silicon Laboratories Inc, SI1011-A-GM Datasheet - Page 269

• Manufacturer Part Number: SI1011-A-GM
• Description: IC TXRX MCU + EZRADIOPRO
• Manufacturer: Silicon Laboratories Inc

Specifications of SI1011-A-GM

• Package / Case: 42-QFN
• Frequency: 240MHz ~ 960MHz
• Data Rate - Maximum: 256kbps
• Modulation Or Protocol: FSK, GFSK, OOK
• Applications: General Purpose
• Power - Output: 20dBm
• Sensitivity: -121dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 18.5mA
• Current - Transmitting: 85mA
• Data Interface: PCB, Surface Mount
• Memory Size: 8kB Flash, 768B RAM
• Antenna Connector: PCB, Surface Mount
• Number Of Receivers: 1
• Number Of Transmitters: 1
• Wireless Frequency: 240 MHz to 960 MHz
• Interface Type: UART, SMBus, SPI, PCA
• Output Power: 20 dBm
• Operating Supply Voltage: 0.9 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 4 mA
• Minimum Operating Temperature: - 40 C
• Modulation: FSK, GFSK, OOK
• Protocol Supported: C2, SMBus
• Core: 8051
• Program Memory Type: Flash
• Program Memory Size: 8 KB
• Data Ram Size: 768 B
• Supply Current (max): 4 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1872-5

Add R/W
23.5.7. Power Amplifier
The Si1010/1 contains an internal integrated power amplifier (PA) capable of transmitting at output levels
between +1 and +20 dBm. The Si1012/3/4/5 contains a PA which is capable of transmitting output levels
between –8 to +13 dBm. The PA design is single-ended and is implemented as a two stage class CE
amplifier with a high efficiency when transmitting at maximum power. The PA efficiency can only be opti-
mized at one power level. Changing the output power by adjusting txpow[2:0] will scale both the output
power and current but the efficiency will not remain constant. The PA output is ramped up and down to pre-
vent unwanted spectral splatter.
In the Si1002/3 the TX and RX may be tied directly. See the TX/RX direct-tie reference design available on
the
Power must be set to 1.
23.5.7.1. Output Power Selection
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, greatly 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.
6D
Silicon Labs website
R/W
Description
Function/
TX Power
for more details. When the direct tie is used the lna_sw bit in Register 6Dh, TX
reserved reserved reserved reserved lna_sw txpow[2]
D7
txpow[2:0]
txpow[2:0]
000
001
010
011
100
101
110
111
000
001
010
100
101
011
110
111
D6
D5
Rev. 1.0
Si10x0/1 Output Power
Si10x2/3/4/5 Output
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
Power
D3
Si1010/1/2/3/4/5
D2
txpow[1] txpow[0]
D1
D0
POR
Def.
18h
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