BCM3450
®
Brief
SUMMARY OF BENEFITS
•
Provides power amplification and connection to coaxial
MoCA-enabled networks for Broadcom devices with
integrated MoCA MAC/PHYs (BCM7420, BCM7410,
BCM6816, BCM6819, BCM6829, BCM3320).
BCM3450 MOCA™ POWER AMPLIFIER/LOW-NOISE AMPLIFIER
FEATURES
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Single PA/LNA for MoCA™ networks
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Gigabit Passive Optical Network(GPON) to MoCA bridge
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Home MoCA WAN networks
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Broadband home router (BHR)
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PA
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Wideband with 30 dB gain range
Low Power 1.2W
Output Power of 2 dBm (programmable up to 5 dBm)
ACPR of 50 dBr @ 30 MHz offset
Wideband with 25 dB gain range
Low Power 600 mW
Typical noise figure of 8 dB
Conversion gain of 21 dB
Input return loss of 10 dB
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Superior ‘reach’ over in-home cable environments.
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Handles loss through multiple splitters
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Supports long line runs
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Superior Signal/Noise ratio for reliable performance.
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Low power control to meet Energy Star requirements and
simplify power supply design.
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LNA
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BSC interface provides flexible programmability.
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High-speed LNA/PA gain control interface
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Individual block power-up/power-down capability
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Single 3.3V Power Supply
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Two-wire Broadcom Serial Control (BSC)
BCM3450 Power Amplifier/Low-Noise Amplifier
Cable
Triplexer
Triplexer
BCM6816
BCM6816
SerDes
GPON Fiber
BCM3255
BCM3422
RF OVLY
BCM3450
BCM3450
CAB In
BCM3422
BCM7420
Diplexer
Diplexer
CAB Out
1500+ DMIPS
Dual HD AVC,VC-1,MP2, DiVX
3D, 1394a, dual SATA II
1080p60, MoCA 1.1+
MoCA 1.1
240 Mbps
DOCSIS 2.0+ CB
SCTE55 008
3x 1024 QAM
800 DMIPS
BCM3422
BCM3450
GPON Bridge Example
Example Home Gateway Solution
OVERVIEW
LNA/PA IC (BCM3450)
In from Triplexer
LNA Input/
PA Output
Balun (ext)
LNA
1
st
stage
LNA
2
nd
stage
LNA Output
PA
PA Input
CHOKE_VDD_OUT
CHOKE_VDD_IN
LNA_BIAS
Gain Control
Interface
IIC
GAIN_DATA
GAIN_CLK
100 MHz
BCM3450 Reference Design
The BCM3450 is a highly integrated Low Noise Amplifier (LNA) and
power amplifier (PA) designed to substantially reduce the complexity of
MoCA™ interfaces found in emerging networked set-top boxes and
consumer appliances. No external transmit/receive switching is required.
It provides additional consumer benefits by extending in-home “reach”
into difficult and diverse home network topologies. The BCM3450
delivers that reach while reducing the required power to do so. The
BCM3450 provides similar benefits for Gigabit Passive Optical
Networks (GPON)
The wideband PA is capable of delivering output power of 2 dBm with
ACPR of 50 dBr at 30 MHz offset. The PA gain is programmable and
the range spans 30 dB. The wideband LNA has a noise figure of 8 dB
with a conversion gain of 21 dB. The LNA gain is also programmable
with a range of 25 dB. The gain of the PA and LNA can be changed
through a high-speed serial interface indicated above as the
GAIN_DATA and the GAIN_CLK.
The BCM3450 requires a single 3.3V power supply and the power
dissipation for the PA and LNA are 1.2W and 0.6W, respectively.
The BCM3450 is used in conjunction with the Broadcom’s MoCA
MAC/PHY integrated product line. The BCM3450 connects to the
coaxial MoCA via a triplexer and external balun to the LNA differential
input. The BSC port is used to manage LNA and PA performance
parameters and control the power from the MoCA MAC/PHY.
The BCM3450 is optimized to interface with the BCM7420, BCM7410,
BCM6816, BCM6819, BCM6829 and BCM3320.
The performance of the BCM3450 meets the MoCA 1.0, 1.1
requirements for both noise figure and linearity.
Ordering Information:
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BCM3450KMLG – commercial environment, lead free package
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BCM3450KML – commercial environment, leaded package
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BCM3450IMLG – industrial environment, lead free package
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BCM3450IML – industrial environment, leaded package
Broadcom
®
, the pulse logo,
Connecting everything
®
, and the Connecting everything logo are among
the trademarks of Broadcom Corporation and/or its affiliates in the United States, certain other countries
and/or the EU. Any other trademarks or trade names mentioned are the property of their respective
owners.
®
BROADCOM CORPORATION
5300 California Avenue
Irvine, California 92617
© 2008 by BROADCOM CORPORATION. All rights reserved.
3450-PB00-R
12/01/08
Phone: 949-926-5000
Fax: 949-926-5203
E-mail: info@broadcom.com
Web: www.broadcom.com
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