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AD9945:  Complete 12-Bit 40 MHz CCD Signal Processor

Product Details

The AD9945 is a complete analog signal processor for CCD applications. It features a 40 MHz single-channel architecture designed to sample and condition the outputs of interlaced and progressive scan area CCD arrays.

The AD9945’s signal chain consists of a correlated double sampler (CDS), a digitally controlled variable gain amplifier (VGA), a black level clamp, and a 12-bit A/D converter.

The internal registers are programmed through a 3-wire serial digital interface. Programmable features include gain adjustment, black level adjustment, input clock polarity, and power-down modes. The AD9945 operates from a single 3 V power supply, typically dissipates 140 mW, and is packaged in a space-saving 32-lead LFCSP.


  • 40 MSPS Correlated Double Sampler (CDS)
  • 6 dB to 40 dB 10-Bit Variable Gain Amplifier (VGA)
  • Low Noise Optical Black Clamp Circuit
  • Preblanking Function
  • 12-Bit 40 MSPS A/D Converter
  • No Missing Codes Guaranteed
  • 3-Wire Serial Digital Interface
  • 3 V Single-Supply Operation
  • Low Power: 140 mW @ 3 V Supply
  • Space-Saving 32-Lead
    5 mm x 5 mm LFCSP

Functional Block Diagram for AD9945


Title Content Type File Type
AD9945: Complete 12-Bit 40 MHz CCD Signal Processor Data Sheet (Rev C, 05/2013) (PDF, 1840 kB) Data Sheets PDF
Design A Clock-Distribution Strategy With Confidence
by Demetrios Efstathiou (Electronic Design, April 27, 2006)
Technical Articles HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

AD9945 Model Options
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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