AD9948 Datasheet | Analog Devices

FEATURES Correlated Double Sampler (CDS) 0 d B to 18 d B Pixel Gain Amplifier (Px GA®) 6 d B to 42 d B 10-Bit Variable Gain Amplifier (VGA) 10-Bit 25 MSPS A/D Converter Black Level Clamp with Variable Level Control plete On-Chip Timing Driver Precision Timing Core with 800 ps Resolution On-Chip 3 V Horizontal and RG Drivers 40-Lead LFCSP Package APPLICATIONS Digital Still Cameras High Speed Digital Imaging Applications GENERAL DESCRIPTION The AD9948 is a highly integrated CCD signal processor for digital still camera applications. Specified at pixel rates of up to 25 MHz, the AD9948 consists of a plete analog front end with A/D conversion, bined with a programmable timing driver. The Precision Timing core allows adjustment of high speed clocks with 800 ps resolution. The analog front end includes black level clamping, CDS, Px GA, VGA, and a 25 MHz 10-bit A/D converter. The timing driver provides the high speed CCD clock drivers for RG and H1- H4. Operation is programmed using a 3-wire serial interface. Packaged in a space-saving 40-lead LFCSP package, the AD9948 is specified over an operating temperature range of - 20° C to +85° C. FUNCTIONAL BLOCK DIAGRAM REFT REFB 0d B TO 18d B CDS Px GA 6d B TO 42d B VGA VREF 10-BIT ADC 10 DOUT CCDIN CLAMP INTERNAL CLOCKS HBLK CLP/PBLK RG H1- H4 4 HORIZONTAL DRIVERS PRECISION TIMING CORE SYNC GENERATOR INTERNAL REGISTERS SCK SDATA REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective panies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 .analog. Fax: 781/326-8703 © 2003 Analog Devices, Inc....