Video processor
INTEGRATED CIRCUITS
DATA SHEET
TDA4685 Video processor with automatic cut-off control
Product specification Supersedes ...
Description
INTEGRATED CIRCUITS
DATA SHEET
TDA4685 Video processor with automatic cut-off control
Product specification Supersedes data of May 1993 File under Integrated Circuits, IC02 1997 Jun 20
Philips Semiconductors
Product specification
Video processor with automatic cut-off control
FEATURES Operates from an 8 V DC supply Black level clamping of the colour difference, luminance and RGB input signals with coupling-capacitor DC level storage Two analog RGB inputs, selected either by fast switch signals or via I2C-bus; brightness and contrast control of both RGB inputs Saturation, contrast, brightness and white adjustment via I2C-bus Same RGB output black levels for Y/CD and RGB input signals Timing pulse generation from either a 2 or 3-level sandcastle pulse for clamping, vertical synchronization and cut-off timing pulses Automatic cut-off control or clamped output selectable via I2C-bus Automatic cut-off control with picture tube leakage current compensation Cut-off measurement pulses after end of the vertical blanking pulse or end of an extra vertical flyback pulse Two switch-on delays to prevent discolouration before steady-state operation Average beam current and peak drive limiting PAL/SECAM or NTSC matrix selection via I2C-bus Emitter-follower RGB output stages to drive the video output stages I2C-bus controlled DC output e.g. for hue-adjust of NTSC (multistandard) decoders. GENERAL DESCRIPTION The TDA4685 is a monolithic integrated circuit with a ...
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