AD9949

12-Bit CCD Signal Processor with Precision Timing Core AD9949 FEATURES New AD9949A supports CCD line length > 4096 pixels Correlated double sampler (CDS) 0 dB to 18 dB pixel gain amplifier (PxGA®) 6 dB to 42 dB 10-bit variable gain amplifier (VGA) 12-bit, 36 MSPS analog-to-digital converter (ADC) Black level clamp with variable level control Complete on-chip timing driver Precision Timing™ core with < 600 ps resolution On-chip 3 V horizontal and RG drivers 40-lead LFCSP package GENERAL DESCRIPTION The AD9949 is a highly integrated CCD signal processor for digital still camera applications. Specified at pixel rates of up to 36 MHz, the AD9949 consists of a complete analog front end with A/D conversion, combined with a programmable timing driver. The Precision Timing core allows adjustment of high speed clocks with < 600 ps resolution. The analog front end includes black level clamping, CDS, PxGA, VGA, and a 36 MSPS, 12-bit ADC. The timing driver provides the high speed CCD clock drivers for RG and H1 to H4. Operation is programmed using a 3-wire serial interface. Packaged in a space-saving, 40-lead LFCSP package, the AD9949 is specified over an operating temperature range of −20°C to +85°C. APPLICATIONS Digital still cameras High speed digital imaging applications FUNCTIONAL BLOCK DIAGRAM REFT REFB 0dB TO 18dB CCDIN CDS PxGA 6dB TO 42dB VGA VREF 12-BIT ADC 12 DOUT CLAMP INTERNAL CLOCKS HBLK CLP/PBLK RG H1 TO H4 4 HORIZONTAL DRIVERS PRECISION TIMING CORE CLI AD9949 ...