Part # AD9945 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD9945 Complete 12-Bit 40 MHz CCD Signal Processor Data Sheet (REV. A)

Part Details:

Complete 12-Bit 40 MHz CCD Signal Processor AD9945 FEATURES GENERAL DESCRIPTION 40 MSPS Correlated Double Sampler (CDS) The AD9945 is a complete analog signal processor for CCD 6 dB to 40 dB 10-Bit Variable Gain Amplifier (VGA) applications. It features a 40 MHz single-channel architecture Low Noise Optical Black Clamp Circuit designed to sample and condition the outputs of interlaced and Preblanking Function progressive scan area CCD arrays. The AD9945 s signal chain 12-Bit 40 MSPS A/D Converter consists of a correlated double sampler (CDS), a digitally con- No Missing Codes Guaranteed trolled variable gain amplifier (VGA), a black level clamp, and a 3-Wire Serial Digital Interface 12-bit A/D converter. 3 V Single-Supply Operation The internal registers are programmed through a 3-wire serial digital Low Power: 140 mW @ 3 V Supply interface. Programmable features include gain adjustment, black Space-Saving 32-Lead 5 mm 5 mm LFCSP level adjustment, input clock polarity, and power-down modes. APPLICATIONS The AD9945 operates from a single 3 V power supply, typi- Digital Still Cameras cally dissipates 140 mW, and is packaged in a space-saving Digital Video Camcorders 32-lead LFCSP. PC CamerasPortable CCD Imaging DevicesCCTV Cameras FUNCTIONAL BLOCK DIAGRAM REFT REFB PBLK AD9945 BAND GAP DRVDD REFERENCE DRVSS 6dB TO 40dB 12 12-BIT CDS VGA DOUT CCDIN ADC CLP AVDD 10 CLPOB AVSS CONTROL REGISTERS

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AD9945.pdf Datasheet