Overview
The LA9520V is a receiver IC developed for free-space infrared transmission of stereo audio and video signals. It integrates all the required functions for reception, including I/V conversion for the received signal, a preamplifier, ALC, audio signal demodulation, and video signal demodulation functions, on a single chip. An AV coupler system can be implemented easily using this IC and a transmitter IC (such as the LA9511W or LA9512W).

Functions and Features
[Input Block]
• I/V conversion featuring excellent wideband characteristics
• Preamplifier ALC with wide ALC operating range

[Audio Block]
• Audio demodulator: Built-in 4.3 and 4.8 MHz demodulation circuits.
• Muting function: Mutes the output stage when there is no input signal. The muting function operating level can be adjusted from an input pin.
• Output amplifiers: The right and left levels can be adjusted by applying voltages to input pins. Electronic volume control support.

[Video Block]
• Video demodulator
• Video amplifier: Supports 75 Ω drive. Adjustable output level: supports an electronic volume control.
• Muting function: Mutes the output stage when there is no input signal. The muting function operating level can be adjusted from an input pin.
• Filter: Removes unneeded high-frequency components.