AD9848

a FEATURES AD9848: 10-Bit, 20 MHz Version AD9849: 12-Bit, 30 MHz Version Correlated Double Sampler (CDS) –2 dB to +10 dB Pixel Gain Amplifier (PxGA®) 2 dB to 36 dB 10-Bit Variable Gain Amplifier (VGA) 10-Bit 20 MHz A/D Converter (AD9848) 12-Bit 30 MHz A/D Converter (AD9849) Black Level Clamp with Variable Level Control Complete On-Chip Timing Driver Precision Timing™ Core with 1 ns Resolution @ 20 MSPS On-Chip 3 V Horizontal and RG Drivers (AD9848) On-Chip 5 V Horizontal and RG Drivers (AD9849) 48-Lead LQFP Package APPLICATIONS Digital Still Cameras CCD Signal Processors with Integrated Timing Driver AD9848/AD9849 PRODUCT DESCRIPTION The AD9848 and AD9849 are highly integrated CCD signal processors for digital still camera applications. Both include 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 approximately 1 ns resolution. The AD9848 is specified at pixel rates of 20 MHz, and the AD9849 is specified at 30 MHz. The analog front end includes black level clamping, CDS, PxGA, VGA, and a 10-bit or 12-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 48-lead LQFP, the AD9848 and AD9849 are specified over an operating temperature range of –20°C to +85°C. CCDIN FUNCTIONAL BLOCK DIAGRAM VRT VRB CDS 4؎6dB PxGA 2dB TO 36dB VGA VREF AD...