BCM4390DKWBGT Datasheet, PDF (37/78 Pages) Cypress Semiconductor – WICED™ Wi-Fi IEEE 802.11 b/g/n SoC with Embedded Application Processor

BCM4390 Advance Data Sheet
WLAN Radio Subsystem
Section 8: WLAN Radio Subsystem
The BCM4390 includes an integrated single-band WLAN RF transceiver that has been optimized for use in
2.4 GHz WLAN systems. It has been designed to provide low-power, low-cost, and robust communications for
applications operating in the globally available 2.4 GHz unlicensed ISM band. The transmit and receive sections
include all on-chip filtering, mixing, and gain control functions.
A block diagram of the radio subsystem is shown in Figure 10. Note that integrated on-chip baluns (not shown)
convert the fully differential transmit and receive paths to single-ended signal pins.
Figure 10: Radio Functional Block Diagram
WL PA
WL PAD WL PGA WL TX G-Mixer
WL LNA WL G-LNA12
WL RX G-Mixer
WL TXLPF
WL RXLPF
WL DAC
WL ADC
WLAN BB
Voltage
Regulators
WL GTX
WL GRX
WL LOGEN
WL PLL
CLB
XO
LPO/Ext LPO/RCAL
Receiver Path
The BCM4390 has a wide dynamic range, direct conversion receiver that employs high order on-chip channel
filtering to ensure reliable operation in the noisy 2.4 GHz ISM band. The 2.4 GHz receive path has a dedicated
on-chip low-noise amplifier (LNA).
BROADCOM ®
February 5, 2014 • 4390-DS103-R
WICED Wi-Fi IEEE 802.11 SoC w/Embedded App Processor
Page 36
BROADCOM CONFIDENTIAL