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AD9928 Datasheet(PDF) 1 Page - Analog Devices |
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AD9928 Datasheet(HTML) 1 Page - Analog Devices |
1 / 2 page Dual Channel 14-Bit CCD Signal Processor with V-Driver and Precision Timing Generator AD9928 Rev. SpD Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. 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 ©2009 Analog Devices, Inc. All rights reserved. FEATURES Registers similar to AD9920A and AD9990 Timing generator with 18-channel V-driver Serial data output with reduced range LVDS interface 1.8 V dual AFE core Internal LDO regulators for compatibility with 3 V systems Correlated double sampler (CDS) with −3 dB, 0 dB, +3 dB, and +6 dB gain 6 dB to 42 dB, 10-bit variable gain amplifier (VGA) 14-bit, 40 MHz analog-to-digital converter (ADC) Black level clamp with variable level control Precision Timing core with ~390 ps resolution at 40 MHz On-chip 3 V horizontal and RG drivers General-purpose outputs (GPOs) for shutter support On-chip driver for external crystal 128-ball CSP_BGA package, 9 mm × 9 mm, 0.65 mm pitch APPLICATIONS Digital still cameras Medical imaging Industrial cameras GENERAL DESCRIPTION The AD9928 is a highly integrated CCD signal processor for digital still camera applications. It includes a dual analog front end with analog-to-digital conversion, combined with a full- function programmable timing generator and 18-channel vertical driver (V-driver) for a 2-channel output CCD. The timing generator is capable of supporting up to 24 vertical clock signals internally, and the on-chip V-driver supports up to 18 high voltage outputs. A Precision Timing™ core allows adjustment of high speed clocks with approximately 390 ps resolution at 40 MHz operation. The AD9928 also contains eight general- purpose outputs, which can be used for shutter and system functions. Each analog front end includes black level clamping, CDS, VGA, and a 14-bit ADC. The timing generator provides all the necessary CCD clocks: RG, H-clocks, V-clocks, sensor gate pulses, substrate clock, and substrate bias control. The AD9928 is specified over an operating temperature range of –25°C to +85°C. FUNCTIONAL BLOCK DIAGRAM AD9928 CDS VGA CLAMP CLAMP 14-BIT ADC SL SCK SDI CLI VREF_B 6dB TO 42dB 6dB TO 42dB HORIZONTAL DRIVERS VERTICAL TIMING CONTROL RG_A, RG_B H1A TO H4A, H1B TO H4B 24 REFT_B REFB_B PRECISION TIMING GENERATOR SYNC GENERATOR INTERNAL CLOCKS HD VD SYNC INTERNAL REGISTERS CCDIN_A –3dB, 0dB, +3dB, +6dB HL_A, HL_B CLO GPO1 TO GPO7 XV1 TO XV24 XSUBCK VERTICAL DRIVER SUBCK CDS VGA 14-BIT ADC CCDIN_B –3dB, 0dB, +3dB, +6dB TCLKP TCLKN DOUT0P_A DOUT0N_A DOUT1P_A DOUT1N_A DOUT0P_B DOUT0N_B DOUT1P_B DOUT1N_B V1A TO V15 XSUBCNT (GPO8) LDO REG_A LDO REG_B VREF_A REFT_A REFB_A 14 14 8 18 2 7 REDUCED RANGE LVDS OUTPUTS RST +1.8V +3V +1.8V +3V LDO_IN LDO_OUT LDO_IN LDO_OUT Figure 1. For more information on the AD9928, email Analog Devices, Inc., at afe.ccd@analog.com. |
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