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AD9942 Arkusz danych(PDF) 1 Page - Analog Devices |
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AD9942 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 36 page Dual-Channel, 14-Bit CCD Signal Processor with Precision Timing™ Core AD9942 Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other 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 ©2006 Analog Devices, Inc. All rights reserved. FEATURES 40 MHz correlated double sampler (CDS) 0 dB to 18 dB, 9-bit variable gain amplifier (VGA) 40 MSPS analog-to-digital converter (ADC) Optical black clamp (CLPOB) with variable level control Complete on-chip timing driver Precision Timing core with <550 ps resolution On-chip 3 V horizontal and RG drivers 4-phase H-clock mode 100-lead, 9 mm × 9 mm, CSP_BGA package APPLICATIONS Signal processor for dual-channel CCD outputs Digital still cameras Digital video cameras High speed digital imaging applications GENERAL DESCRIPTION The AD9942 is a highly integrated dual-channel CCD signal processor for digital still camera applications. Each channel is specified at pixel rates of up to 40 MHz. The AD9942 consists of a complete analog front end with analog-to-digital conversion, combined with a programmable timing driver. The Precision Timing core allows high speed clocks to be adjusted with 550 ps resolution. The analog front end uses black level clamping and includes a VGA, a 40 MSPS ADC, and a CDS. The timing driver provides the high speed CCD clock drivers for RG_A and RG_B, as well as the H1A to H4A and H1B to H4B outputs. The 6-wire serial interface is used to program the AD9942. Available in a space-saving, 9 mm × 9 mm, CSP_BGA package, the AD9942 is specified over an operating temperature range of −25°C to +85°C. FUNCTIONAL BLOCK DIAGRAM AD9942 SYNC GENERATOR PRECISION TIMING CORE INTERNAL CLOCKS HORIZONTAL DRIVERS RG_B RG_A H1A TO H4A 4 H1B TO H4B 4 HD_A VD_A HD_B VD_B INTERNAL REGISTERS SL_A SDATA_A SL_B SDATA_B SCK_A SCK_B CLI_A CLI_B CLAMP DOUT_A CCDIN_A 0dB ~ 18dB VGA ADC CDS 14 CLAMP DOUT_B CCDIN_B 0dB ~ 18dB VGA ADC CDS 14 REFT_B REFB_B VREF_B REFT_A REFB_A VREF_A Figure 1. |
Podobny numer części - AD9942_15 |
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Podobny opis - AD9942_15 |
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