BCM3419 Datasheet, PDF (1/1 Pages) Broadcom Corporation. – ADVANCED LOW IF DIRECT CONVERSION CABLE TUNER

BCM3419
®
ADVANCED LOW IF DIRECT CONVERSION CABLE TUNER
FEATURES
• Single-chip direct conversion silicon tuner completes system
design with Broadcom cable modem
• DOCSIS^®/EuroDOCSIS™ 1.0/1.1/2.0
• Supports 64, 256, and 1024 QAM
• Input frequency range of 50 MHz through 860 MHz
IF (intermediate frequency) output range of 4 MHz, 4.5 MHz,
and 5 MHz
• For use in 6-MHz, 7-MHz, and 8-MHz systems
• High linearity across entire frequency range
• Differential signals for high noise immunity
• Integrated and cost-effective BOM:
• True single-chip tuner
• Single 3.3V supply voltage
• Fully integrated oscillator
• Fully integrated channel selectivity
• Symmetrical IF output for direct connection to channel decoder
• RSSI (Received Strength Signal Indicator) information
provided through I²C bus
• Standby mode
• 40-pin MLF package
SUMMARY OF BENEFITS
• Extreme integration level leads to highly cost-effective BOM
• Eliminates significant external components:
• SAW (Surface Acoustic Wave) IF filters
• RSSI measurement components
• IF amplifiers
• Oscillator components
• Package optimization enables low-cost 2-layer system PCB
• Minimal in-house RF expertise required
• Support for DOCSIS/EuroDOCSIS 2.0 enables one device
solution to be used worldwide
• Superior alternative to can tuners
• High quality and reliability (no hand tweaking)
• Enables lower profile and smaller designs
• Proven reference design for quick time-to-market
• Simplified manufacturing flow
• Single supply voltage provides low-cost operation
• Low-power consumption
•
APPLICATIONS
• Cable Modems
• Cable Gateways
• Voice Cable Modems
Tuner Application Example (Cable Modem)