Preliminary Data

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to

change without notice.

July 2007

Rev 2

1/35

35

VL6522

VGA resolution USB2.0 web camera sensor

Features

Σ - Δ ADC and

processing

and control

– Automatic exposure

– Automatic white balance

– Dark level compensation

– Lens shading correction

– Image sub-sampling

– Flicker cancellation

– Sharpening

– Gamma correction

– RGB to YUV 422

– Audio class compliance PCM16

– Preamplifier + ADC + processing

– Audio rates of 8 kHz to 48 kHz, 16 bits

– Audio dynamic range from mic. input to

USB data output > 60 dB

Description

The VL6522 is a VGA imager on chip (IOC),

fabricated in a high performance 0.18 µm CMOS

imaging process. The device produces a YUV

frames per second, and supports a microphone

input.

Video and audio data is output via a USB2.0 high

speed (480 Mbps) interface and allows simple

interfacing to a host PC using generic audio and

video class drivers under the appropriate

operating system (Windows XP). Audio/video

class compliance and vendor command sets

allow development of other O/S drivers with

relative ease.

Figure 1.

Functional block diagram

a.

60 fps max at QVGA resolution, 30 fps max at VGA

resolution

USB2

interface

OSC, PLL

Power

management

VGA pixel array

+

ADC readout

Audio

pre-amplifier

+

ADC

audio

data

pixel video

data

Digital processing

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