AD9846A

a FEATURES 30 MSPS Correlated Double Sampler (CDS) 4 dB ؎ 6 dB 6-Bit Pixel Gain Amplifier ( PxGA®) 2 dB to 36 dB 10-Bit Variable Gain Amplifier (VGA) Low Noise Clamp Circuits Analog Preblanking Function 10-Bit 30 MSPS A/D Converter Auxiliary Inputs with VGA and Input Clamp 3-Wire Serial Digital Interface 3 V Single Supply Operation Low Power: 100 mW @ 2.7 V 48-Lead LQFP Package APPLICATIONS Digital Still Cameras Digital Video Camcorders Industrial Imaging Complete 10-Bit 30 MSPS CCD Signal Processor AD9846A PRODUCT DESCRIPTION The AD9846A is a complete analog signal processor for CCD applications. It features a 30 MHz single-channel architecture designed to sample and condition the outputs of interlaced and progressive scan area CCD arrays. The AD9846A’s signal chain consists of an input clamp, correlated double sampler (CDS), Pixel Gain Amplifier (PxGA), digitally controlled variable gain amplifier (VGA), black level clamp, and a 10-bit A/D converter. Additional input modes are provided for processing analog video signals. The internal registers are programmed through a 3-wire serial digital interface. Programmable features include gain adjustment, black level adjustment, input configuration, and power-down modes. The AD9846A operates from a single 3 V power supply, typically dissipates 117 mW, and is packaged in a 48-lead LQFP. FUNCTIONAL BLOCK DIAGRAM PBLK AVDD AVSS HD VD CLPOB 4dB؎6 dB COLOR STEERING 2dB~36dB 2:1 MUX VGA DRVDD CLP DRVSS CCDIN CDS PxGA ADC 10 DOUT C...