O V ERVI EW

®

Phone: 949-450-8700

Fax: 949-450-8710

E-mail: info@broadcom.com

Web: www.broadcom.com

BROADCOM CORPORATION

16215 Alton Parkway, P.O. Box 57013

Irvine, California 92619-7013

© 2003 by BROADCOM CORPORATION. All rights reserved.

2004-PB02-R

10/24/03

or its subsidiaries in the United States and certain other countries. Bluetooth™ is a trademark owned by

Bluetooth SIG. All other trademarks mentioned are the property of their respective owners.

The BCM2004 Bluetooth transceiver is an integrated radio transceiver

that is optimized for use in QUALCOMM MSM-based wireless systems.

The transceiver is Bluetooth 1.1 and 1.2 compliant and is designed to

enable simultaneous operation with any of the radios options, including

GPS, WCDMA, CDMA, and GSM/GPRS.

The BCM2004 is a high-performance radio implemented in digital

CMOS. It incorporates fractional-N frequency generation technology to

synthesize all industry standard reference frequencies for mobile phone

applications. A proprietary self-calibrating VCO structure allows for

both excellent phase noise and fast frequency hopping covering the

entire band.

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.

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 GFSK transmit signal is first generated at baseband in a proprietary

modulator. It is then filtered and upconverted to RF using the quadrature

LO signals. Four output power levels are digitally programmable from

full power to low power in 4-dB steps.

The BCM2004 has a fully integrated T/R switch and associated

matching circuits. This eliminates the need for any external inductors or

active components.

The BCM2004 is controlled via a QUALCOMM proprietary baseband

interface. 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.