Overview

The LV1035M is a Dolby ProLogic surround signal-processing IC that combines the functionality of the LV1016 and LA2786 products. The LV1035M allows systems that provide both Dolby ProLogic surround functionality and a wide range of additional digital surround functions to be constructed with a single IC.

Features

• ProLogic surround decoder implemented in a single chip

• Wide dynamic range

• All modes can be controlled over a serial data control interface using clock, data, enable signals.

Functions

• Adaptive matrix

• Center mode control (normal, phantom, and wide)

• 4-channel/3-channel logic control

• Auto-balance (on/off)

• ProLogic off mode (bypass and full bypass)

• Center trim (0 to –31 dB) in 1-dB steps

• On-chip memory (8K SRAM)

• Variable delay time (50, 40, 30, 25, 20, 15 ms)

• New A/D and D/A converter circuits adopted.

• Dolby B noise reduction

• On-chip I/O filters

• Built-in VDD circuit

• Surround trim (0 to –31 dB) in 1-dB steps

• Input and output muting functions