QAM解调器IC，具有A / D转换器 QAM demodulator IC with A/D converter
Description
The is a complete single-chip QAM quadrature amplitude modulation demodulation and FEC forward error correction solution that performs sampled IF to transport stream MPEG-2 or MPEG-4 block processing of QAM signals. It is intended for the digital transmission of compressed television, sound, and data services over cable.
Features
■ Decodes ITU-T J.83-Annexes A/C and DVB-C bit streams
■ Processes Japanese transport stream multiplex frame TSMF
■ High-performance integrated A/D converter suitable for direct IF architecture in all QAM quadrature amplitude modulation modes
■ Supports 16, 32, 64, 128 and 256 point constellations
■ Small footprint package: 10 x 10 mm²
■ Very low power consumption
■ Full digital demodulation
■ Variable symbol rates
■ Front derotator for better low symbol rate performance and relaxed tuner constraints
■ Integrated matched filtering
■ Robust integrated adaptive pre and post equalizer
■ On-chip FEC A/C with ability to bypass individual blocks
■ 10 programmable GPIO
■ Two AGC outputs suitable for delayed AGC applications sigma-delta outputs
■ Integrated signal quality monitors, plus lock indicator and interrupt function mapped to GPIO pin
■ Improved signal acquisition
■ System clock generated on-chip from quartz crystal
■ Low frequency crystal operations 4, 16, 25 - 30 MHz
■ 4 I2C addresses
■ Easy control and monitoring via 2-wire fast I2C bus
■ Additional I2C bus I2C repeater dedicated to tuner control for minimum tuner disturbance
■ Programmable clock derived from system clock and available for external use
■ Parallel and serial output interfaces, with DVB common interface support
■ On chip voltage regulator
■ CMOS technology, 1.0 V operation
Applications
■ Japan, Europe, Asia cable set-top boxes
■ Cable modems
■ Cable ready TV
■ Cable PC card
■ Cable network module