BOARDCOM BCM2002X

BCM2002X
PRODUCT
Brief
®
BCM2002X 2.4 GHZ BLUETOOTHTM FRAC-N RADIO
B C M 2 0 0 2 X
S U M M A R Y
F E AT U R E S
• BQB qualified Bluetooth V1.1 radio transceiver
frequency generation
• •Fractional-N
Supports 12, 13, 19.2, 19.68, or 19.8 MHz reference
O F
B E N E F I T S
for mobile phone integration
• Ideal
• Designed to handle the very harsh environment of mobile
phones while maintaining high radio performance and
optimizing overall phone performance.
• In-band and out-of-band blocking performance significantly
exceeds Bluetooth requirements.
• Fractional-N frequency generation technology eliminates the
need for a dedicated reference crystal, which is an additional
source of RF noise.
frequencies
• Differential RF interface
-80 dBm receiver sensitivity under high
• Typical
interference environments
+3 dBm RF output power satisfied
• Typical
requirements for Class 2 operation
spurious emissions performance
• •Strong
Minimal filtering required to meet mobile phone integration
Monolithic implementation in a standard digital
• CMOS
process with minimal external components
requirements
•
blocking performance
• •Excellent
Minimal filtering required to meet mobile phone integration
requirements
• Highly linear receiver exceeds Bluetooth specifications
Meets FCC radiated emissions requirements without
• RF
filtering or shielding
Low
• power consumption
• Built-in digital RSSI
• Programmable PA gain
• 8mm x 8mm, 52-pin LPCC standard package
•
provides a manufacturable low-cost Bluetooth RF/IF
solution.
On-chip auto-calibration eliminates process variation
across components and mitigates temperature
variation, enabling the chips to be used in high-volume
mobile phone applications.
The BlueRF RXMODE2 unidirectional baseband
interface supports connection to a wide variety of
baseband devices.
Applications:
• • GSM, CDMA, GPRS, and WCDMA mobile phones
BCM2002X BlueRF Frac-N Radio Application Example
Baseband
Device
BRCLK
TX CLK
BRXD
FSK D
BTXD
TX D
BPKTCTRL
SL CTR L
BPAEN
PA RAMP
BRXEN
RX PU
BTXEN
BSEN
BXTLEN
TX PU
SYNTH PU
Ext Clk
(from Mobile Phone)
BCM2002X
XTAL PU
BnPWR
BPWR
BMISO
SRI DO
BMOSI
SRI DI
BOCLK
SRI C
BnDEN
SRI E
Loop
Filters
B C M 2 0 0 2 X
O V E R V I E W
BCM2002X Functional Block Diagram
RF Input
Demodulator
Bit Slicer
LO
Generation
Digital Output
Frac-N PLL
Loop
Filter
RF Output
Modulator
Calibration
The BCM2002X is a Bluetooth 1.1 compliant integrated radio
transceiver device operating in the 2.4 GHz band. It is ideal for
integration in mobile phone applications where the radio has
been designed to handle the harsh environments of mobile
phones to provide the highest communication link quality of
service.
The BCM2002X uses fractional-N frequency generation
technology to synthesize the different reference frequencies for
mobile phone applications. The fractional-N technology
eliminates the need for a dedicated reference crystal, which
lowers BOM cost and eliminates an additional RF noise source.
The receiver front-end consists of a low-noise amplifier and an
image reject mixer. Balanced mixer structures fed by accurate
quadrature LO signals allow an excellent noise figure and strong
image rejection.
Control
Interface
Digital Input
Control I/F
(BlueRF)
A low IF frequency allows for high performance amplifier and
filter designs in CMOS. The bandpass filter structure features
self-calibration circuitry that automatically adjusts circuit
elements to compensate for any process variation. This
eliminates tuning and ensures that process and temperature
variation are uniform across the devices. The IF amplifiers
provide a limiting function so that the following stages always
get a constant signal level regardless of the RF input level. An
RSSI signal is also generated in these amplifiers for the system
to determine signal strength. The signal is then filtered further,
demodulated, and finally sent to a bit slicer to generate logic
level data output.
The BCM2002X is controlled via a BlueRF unidirectional
interface. BlueRF is a Bluetooth industry-standard specification
that provides compatibility between Bluetooth RF and baseband
chips. This interface provides control for the various sections of
the chip, defines data transfers and allows access to the various
internal registers of the device.
Broadcom®, the Pulse logo®, and Connecting everything® are trademarks of Broadcom
Corporation and/or its affiliates in the United States and certain other countries. All other
trademarks mentioned are the property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2003 by BROADCOM CORPORATION. All rights reserved.
2002X-PB04-R-06.13.03
Phone: 949-450-8700
FAX: 949-450-8710
Email: info@broadcom.com
Web: www.broadcom.com