AL875 Datasheet, PDF (2/2 Pages) List of Unclassifed Manufacturers – Triple High Speed, 8-bit Analog-to-Digital Converter

The AL875 is a high-speed triple 8-bit monolithic analog-to-digital converter (ADC) designed for
digitizing RGB graphics/video signal or other applications. Its 110 MHz conversion rate can
support display resolution of up to 1280x1024 at 60Hz refresh rate.
The AL875 accepts 0.6~2.0V analog input range without using pre-amplifiers which may reduce the
overall S/N ratio. Digitized data is piped at the full clock rate to the 24-bit output port. The AL875
uses 3.3V power with 5V tolerant I/O and low power dissipation.
The sampling clock is provided by an external clock source, usually a PLL, which multiplies the
frequency of the input reference clock (usually a HSYNC signal) to generate the sampling clock.
The AL875 provides a programmable PLL divider up to 4096.
In addition, the input active horizontal and vertical starting and ending positions can be detected to
ensure that the whole picture fits into the displayable region of the screen. Through an I²C interface,
the AL875 is fully programmable to support various graphic resolutions.
Analog graphic/video signals such as RGB, YCbCr and YPbPr can be digitized by the AL875. The
digitized data can then be processed by the AL250/251 line doubler, AL300 LCD controller, or
other proprietary designs for various applications.
Ordering Information
Part number Package
AL875 100-pin QFP
Power supply
+3.3 volt
Maximum Operating Frequency
110MHz
For more information about the AL875 or other AverLogic products, please contact your local
authorized representatives, visit our website, or contact us directly.
DISTRIBUTED BY:
AVERLOGIC TECHNOLOGIES, INC. E-mail: [e-mail]
AVERLOGIC TECHNOLOGIES, CORP. E-mail: [e-mail]
URL: www.averlogic.com
URL: www.averlogic.com.tw
February 25, 2003