Dual-Channel, 14-Bit CCD Signal Processor with Precision Timing Core AD9978 FEATURES GENERAL DESCRIPTION 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 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. APPLICATIONS Digital video cameras Digital still cameras Digital copiers Multifunction printers High speed industrial cameras Packaged in a space-saving, 6 mm × 6 mm, 40-lead LFCSP, the AD9978 is specified over an operating temperature range of −25°C to +85°C. FUNCTIONAL BLOCK DIAGRAM AD9978 VREF INP_A INM_A INP_B INM_B 6dB TO 42dB CDS/ SHA ADC VGA –3dB, 0dB, +3dB, +6dB CLAMP –3dB, 0dB, +3dB, +6dB CLAMP LVDS SERIALIZER 6dB TO 42dB CDS/ SHA VGA ADC DOUT0P DOUT0N DOUT1P DOUT1N TCLKP TCLKN DOUT2P DOUT2N DOUT3P DOUT3N INTERNAL CLOCKS PRECISION TIMING CORE CLI SYNC GENERATOR HD VD INTERNAL REGISTERS SL SDATA SCK 06810-001 CLK_OUT Figure 1. For more information about the AD9978, contact Analog Devices via email at [email protected]. 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. 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 ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06810F-0-9/08(SpB) Rev. SpB | Page 2 of 2