Overview

The LA7265W is a single-chip IC that provides the signal processing required by black and white CCD cameras. This IC is optimal for surveillance cameras, door intercom cameras, and personal computer input cameras due to its ultraminiature package, low current drain, wide dynamic range, and high AGC gain.

Features

• CCD clamping used to provide a wide dynamic range: The LA7265W can handle a 1.5 Vp-p CCD signal data level.

• Reduced sampling noise provided by a built-in CDS capacitor.

• Variable AGC gain: up to a maximum of 32 dB.

• Backlight correction provided by weighting the iris and AGC levels.

• Three different gamma correction circuits, including Scurve gamma correction

• Knee characteristics are added to the gamma correction to prevent incorrect white rendering in low light situations.

• Automatic aperture adjustment according to the brightness

• Reduced current drain (under 40 mA)

• Ultraminiature package (SQFP48)

• Reduced external component count (50 as compared to the earlier Sanyo LA7261M)

• Reduced number of adjustment points (two points)

Functions

• CCD clamping

• CDS (built-in S/H capacitor)

• IRIS amplifier

• AGC backlight correction

• S-curve gamma correction

• Aperture correction

• Variable setup

• Sync addition

• CCD clipping

• IRIS window

• AGC amplifier

• Gamma correction (0.45, 1.0 and variable)

• 1H interpolation switch

• Aperture low illumination suppression

• Variable W.C.

• 75 Ω drivers