RF3000PCBA RFMD [RF Micro Devices], RF3000PCBA Datasheet - Page 7

• Manufacturer Part Number: RF3000PCBA
• Description: SPREAD-SPECTRUM BASEBAND MODEM
• Manufacturer: RFMD [RF Micro Devices]

Figure 4. 2.4GHz IEEE802.11b Chipset Diagram
Figure 4 shows the complete 2.4GHz chipset, and where the RF3000 fits into the system. Figure 5 shows a simplified
block diagram of the RF3000. The RF3000 is a complete spread-spectrum transceiver, allowing PSK system operation.
The RF3000 performs all of the functions necessary to modulate a digital data source for transmission in a wireless envi-
ronment. The RF3000: handles preamble and header generation and extraction; automatic gain control; clear channel
assessment; antenna diversity; and, implements an equalizer to handle multi-path events at high data rates.
Rev A4 031216
IF
RF
VCO
IF
Driver
RFMD 2.4 GHz WLAN
System Block Diagram
PA
VCO
RF
Fc = 2442
MHz
RX
TX
÷2
+45°
-45°
Fc = 374 MHz
SAW
IF Amp
TX
General Description
Σ
RX
(f
Active Selectable LPF
C
= 1 MHz to 35 MHz)
Base Band Amp.
0-30 dB Gain
Selectable
Filter
Filter
RF2948
LPF
Fc = 2442
MHz
Dual Gain Modes
VREF_1
LNA
Select
Gain
RX Q DATA
TX Q DATA
ANT Select
RX I DATA
TX I DATA
RX VGC
TX VGC
VREF
Data Converter
RF3000
Reference
RXVGC
TXVGC
I-OUT
Q-OUT
Q-IN
DAC
DAC
ADC
I-IN
ADC
DAC
DAC
Switch
T/R
CCA
Fc = 2442
Filter
Mode Control
Mhz
Control
Port
Preamble/
RF3000
Header
802.11
Preamble/
Header
802.11
Tx Length
Tx Signal
Service
VGC
Diversity
RX
Switch
Antenna 1
LNA GS
RX DATA
RX RDY
DATA CLK
SPI
TX RDY
TX DATA
RX PE
TX PE
MCLK
CCA
Antenna 2
11-327