Overview

The LA7710 is a SECAM (audio IF, electronic volume control, AF preamplifier) / PAL (quasi-parallel audio IF circuit) dual system IC that is packaged in a 16-pin DIP package. The LA7710 is applicable to the SECAM or PAL system by changing over the AGC system (pin 3 is brought to open state or grounded).

Features

• Used as SECAM audio IF circuit by bringing pin 3 to open state. Also used as PAL quasi-parallel audio IF circuit by grounding pin 3.

• Electronic volume control : 0dB output available.

Functions

• IF amplifier.

• Detector.

• IF AGC (peak AGC, average AGC).

• Electronic volume control.

• AF preamplifier.

• PAL/SECAM switch.