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AD9948KCPZRL Fiches technique(PDF) 1 Page - Analog Devices |
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AD9948KCPZRL Fiches technique(HTML) 1 Page - Analog Devices |
1 / 28 page 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 companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved. AD9948 10-Bit CCD Signal Processor with Precision Timing™ Core FUNCTIONAL BLOCK DIAGRAM CLAMP DOUT CCDIN REFT REFB INTERNAL REGISTERS 6dB TO 42dB SYNC GENERATOR SDATA SCK SL HBLK 10 VGA AD9948 PRECISION TIMING CORE 10-BIT ADC VREF INTERNAL CLOCKS PxGA CDS HORIZONTAL DRIVERS 4 RG H1–H4 HD VD CLI CLP/PBLK 0dB TO 18dB FEATURES Correlated Double Sampler (CDS) 0 dB to 18 dB Pixel Gain Amplifier ( PxGA®) 6 dB to 42 dB 10-Bit Variable Gain Amplifier (VGA) 10-Bit 25 MSPS A/D Converter Black Level Clamp with Variable Level Control Complete 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 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 800 ps resolution. The analog front end includes black level clamping, CDS, PxGA, 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. |
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