This part is a kind of semiconductor called ADC08B3000.
Function of this product has 3 GSPS A/D Converter.
Manufacturers : National Semiconductor
Image and pinout :

Some of the text within the PDF file :
ADC08B3000 High Performance, Low Power, 8-Bit, 3 GSPS A/D Converter with 4K Buffer ADVANCE INFORMATION June 2006 ADC08B3000 High Performance, Low Power, 8-Bit, 3 GSPS A/D Converter with 4K Buffer General Description Note: This product is currently in development. - ALL specifications are design targets and are subject to change. The ADC08B3000 is a single, low power, high performance CMOS analog-to-digital converter that digitizes signals to 8 bits resolution at sampling rates up to 3.4 GSPS. Consuming a typical 1.8 Watts at 3 GSPS from a single 1.9 Volt supply, this device is guaranteed to have no missing codes over the full operating temperature range. The unique folding and interpolating architecture, the fully differential comparator design, the innovative design [ ... ]
ADC08B3000 PDF Datasheet Download
