ANALOG DEVICES AD9978 handbook
Contents
1. ANALOG Dual Channel 14 Bit CCD Signal DEVICES Processor with Precision Timing Core AD9978 FEATURES Dual AFE channels 1 8 V analog and digital core supply voltage Serial data output with reduced range LVDS outputs Differential analog inputs CDS or SHA configuration CDS bypass with 3 dB 0 dB 3 dB and 6 dB gain 6 dB to 42 dB 10 bit variable gain amplifier VGA 14 bit 65 MHz analog to digital converter ADC Black level clamp with variable level control Precision Timing core with 240 ps resolution 65 MHz APPLICATIONS Digital video cameras Digital still cameras Digital copiers Multifunction printers High speed industrial cameras E 1 GENERAL DESCRIPTION The AD9978 is a highly integrated dual channel CCD signal processor for high speed digital video camera applications Each channel is specified at pixel rates of up to 65 MHz and consists of a complete analog front end with ADC conversion The Precision Timing core allows adjustment of the correlated double sampler CDS and sample and hold amplifier SHA clocks with 240 ps resolution at 65 MHz operation The AD9978 also contains a reduced range low voltage differential signaling LVDS interface for the dual channel data outputs Each analog front end includes black level clamping a CDS a VGA and a 65 MHz 14 bit ADC Operation is programmed using a 3 wire serial interface Packaged in a space saving 6 mm x 6 mm 40 lead LFCSP the AD9978 is sp2. ecified over an operating temperature range of 25 C to 85 C FUNCTIONAL BLOCK DIAGRAM j 3dB 0dB 3dB 6dB 3dB 0dB 3dB 6dB INTERNAL CLOCKS PRECISION TIMING CORE SYNC GENERATOR F HD CLK_OUT VD Figure 1 For more information about the AD9978 contact Analog Devices via email Rev SpB 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 Specifications subject to change without notice 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 owners DOUTOP DOUTON DOUT1P DOUT1N TCLKP TCLKN DOUT2P DOUT2N DOUT3P DOUT3N INTERNAL REGISTERS 06810 001 SL SDATA SCK at afe ccd analog com One Technology Way P O Box 9106 Norwood MA 02062 9106 U S A Tel 781 329 4700 www analog com Fax 781 461 3113 2007 2008 Analog Devices Inc All rights reserved AD9978 NOTES AN D NALI 2008 Analog Devices Inc All rights reserved Trademarks and ANALOG registered trademarks are the property of their respective owners D06810F 0 9 08 SpB DEVICES www analog com Rev SpB Page 2 of 2
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