SI4205-BM Silicon Laboratories Inc, SI4205-BM Datasheet - Page 25

• Manufacturer Part Number: SI4205-BM
• Description: IC TXRX TRI-BAND 32LGA
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4205-BM

• Frequency: 850MHz, 900MHz, 1.8GHz, 1.9GHz
• Modulation Or Protocol: GSM
• Applications: Cellular, GSM Cellular Radio
• Voltage - Supply: 2.7 V ~ 3.3 V
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Package / Case: 32-LGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Operating Temperature: -
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -
• Current - Transmitting: -
• Current - Receiving: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

Register 05h. Receive Gain
Name
Bit
17:14
13:8
6:4
3:2
1:0
Bit
7
D17 D16 D15 D14 D13 D12 D11 D10
0
0
DGAIN[5:0]
AGAIN[2:0]
LNAG[1:0]
LNAC[1:0]
Reserved
Reserved
0
Name
0
Program to zero.
Digital PGA Gain Control.
00h = 0 dB (default).
01h = 1 dB.
...
3Fh = 63 dB.
Note: See “AN51: Aero Transceiver AGC Strategy” for details on setting the gain
Program to zero.
Analog PGA Gain Control.
000 = 0 dB (default).
001 = 4 dB.
010 = 8 dB.
011 = 12 dB.
100 = 16 dB.
101 = Reserved.
110 = Reserved.
111 = Reserved.
Note: See “AN51: Aero Transceiver AGC Strategy” for details on setting the gain
LNA Bias Current Control.
00 = Minimum current (default).
01 = Maximum current.
10 = Reserved.
11 = Reserved.
Note: Program these bits to the same value as LNAG[1:0].
LNA Gain Control.
00 = Minimum gain (default).
01 = Maximum gain.
10 = Reserved.
11 = Reserved.
Notes:
1. Program these bits to the same value as LNAC[1:0].
2. See “AN51: Aero Transceiver AGC Strategy” for details on setting the gain
DGAIN[5:0]
registers.
registers.
registers.
Rev. 1.0
D9
D8
D7
0
Function
D6
AGAIN[2:0]
D5
D4
D3
LNAC[1:0]
D2
Aero I
D1
LNAG[1:0]
D0
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