HSP50306 - Intersil Corporation

HSP50306 Digital QPSK Demodulator

The HSP50306 is a 6-bit QPSK demodulator chip designed for use in high signal to noise environments which have some multipath distortion. The part recovers 2.048 MBPS data from samples of a QPSK modulated 10.7MHz or 2.1MHz carrier. The chip coherently demodulates the waveform, recovers symbol timing, adaptively equalizes the signal to remove multipath distor.

Features

• 25.6MHz or 26.97MHz Clock Rates
• Single Chip QPSK Demodulator with 10kHz Tracking Loop
• Square Root of Raised Cosine (α = 0.4) Matched Filtering
• 2.048 MBPS Reconstructed Output Data Stream
• Bit Synchronization with 3kHz Loop Bandwidth
• Internal Equalization for Multipath Distortion
• 6-Bit Real Input: Digitized 10.7MHz or 2.1MHz IF
• Level Detection for External IF AGC Loop
• 0.1s Acquisition Time
• 10-9 BER
• <116mA on +5.0V Supply Applications
• Cable Data Link Receivers
• Cable Control Channel Receivers Ordering Information PART NUMBER HSP50306SC-27 HSP50306SC-2796 HSP50306SC-25 H.