bcm4505 Broadcom Corp., bcm4505 Datasheet - Page 2

• Manufacturer Part Number: bcm4505
• Description: Bcm4505 - Advanced Modulation Satellite Receiver
• Manufacturer: Broadcom Corp.

The BCM4505 is a fully integrated satellite receiver single-chip solution
targeted at multituner advanced modulation satellite receiver systems
and ideally suited for new-generation satellite receivers and integrated
multifunction Home Media Centers.
The BCM4505 integrates a CMOS tuner and advanced modulation
decoder supporting DVB-S2 Broadcast, DVB-S, DIRECTV
Turbo applications. The highly integrated tuner section is based on
existing volume-production Broadcom technologies and a direct-
conversion technology to reduce external components and increase
performance.
The BCM4505 is designed to support the full 1-45 Msps DVB operating
range with support for 250 to 2150 MHz input frequencies.
It contains two 8-bit A/D converters, all-digital variable-rate QPSK/
8PSK receivers, an advanced modulation LDPC/BCH and Turbo FEC
decoder, and a DVB-S compliant FEC decoder. All required RAM is
integrated and all required clocks are generated on-chip from a single
reference crystal. The baseband IQ analog waveforms from the tuner
Broadcom
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owners.
BROADCOM CORPORATION
5300 California Avenue
Irvine, California 92617
© 2007 by BROADCOM CORPORATION. All rights reserved.
4505-PB00-R
RF In
LNB
FSK
®
, the pulse logo, Connecting everything
09/04/07
DiSEqC
FSK Transceiver
®
QPSK/
Tuner
8PSK
®
, and the Connecting everything logo are among
A/D
A/D
BCM4505 Block Diagram
®
, and 8PSK
Variable
Demod
Rate
O V E R V I E W
section are sampled by the integrated 8-bit A/D converters and
resampled by the integrated interpolative digital filter banks.
Optimized soft decisions are then fed into either a DVB-S-compliant
FEC decoder, or an advanced-modulation DVB-S2 LDPC/BCH or
Turbo decoder. The final error-corrected output is delivered in MPEG-2
transport format. The output clock is generated by an on-chip PLL for
low-jitter operation and glueless integration with Broadcom's high
definition audio video subsystems, such as the BCM7401 and the
BCM7402.
The communication link sections include an on-chip microcontroller for
all system configuration, acquisition, control, monitoring and diagnostics
functions, as well as an integrated DiSEqC 2.x controller for 2-way
communication with an LNB, and a single FSK transceiver for
communication with ODUs that support multiple LNB configurations
over a single coax connection.
The BCM94505 reference design is available for easy system design and
testing using the BCM4505 advanced modulation receiver chip.
Schematics, Gerber files, and evaluation software are available.
Equalizer
Acquisition Processor
8PSK Turbo Decoder
LDPC/BCH Decoder
DVB-S Decoder
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com
MPEG TS
I
2
C/SPI