BCM4356XKWBGT Datasheet, PDF (85/195 Pages) Cypress Semiconductor – Single-Chip 5G WiFi IEEE 802.11ac 2×2 MAC/ Baseband/Radio with Integrated Bluetooth 4.1, FM Receiver, and Wireless Charging

BCM4356 Advance Data Sheet
Receiver Path
Receiver Path
The BCM4356 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 or the entire 5 GHz U-NII band. An on-chip
low noise amplifier (LNA) in the 2.4 GHz path in core 0 is shared between the Bluetooth and WLAN receivers,
whereas the 5 GHz receive path and the core 1 2.4 GHz receive path have dedicated on-chip LNAs. Control
signals are available that can support the use of external LNAs for each band, which can increase the receive
sensitivity by several dB.
Transmit Path
Baseband data is modulated and upconverted to the 2.4 GHz ISM or 5 GHz U-NII bands, respectively. Linear
on-chip power amplifiers are included, which are capable of delivering high output power while meeting IEEE
802.11ac and IEEE 802.11a/b/g/n specifications, and without the need for external PAs. When using the internal
PAs, closed-loop output power control is completely integrated.
Calibration
The BCM4356 features dynamic and automatic on-chip calibration to continually compensate for temperature
and process variations across components. These calibration routines are performed periodically in the course
of normal radio operation. Examples of some of the automatic calibration algorithms are baseband filter
calibration for optimum transmit and receive performance, and LOFT calibration for carrier leakage reduction.
In addition, I/Q Calibration, R Calibration, and VCO Calibration are performed on-chip. No per-board calibration
is required in manufacturing test, which helps to minimize the test time and cost in large volume production.
Broadcom^®
May 8, 2015 • 4356-DS103-R
BROADCOM CONFIDENTIAL
Page 84