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AD9842A Datasheet

Part NameDescriptionManufacturer
AD9842A Complete 20 MSPS CCD Signal Processors ADI
Analog Devices ADI
Other PDF  not available.
AD9842A image

The AD9841A and AD9842A are complete analog signal processors for CCD applications. Both products feature a 20 MHz single-channel architecture designed to sample and condition the outputs of interlaced and progressive scan area CCD arrays. The AD9841A/AD9842A’s signal chain consists of an input clamp, correlated double sampler (CDS), Pixel Gain Amplifier (PxGA), digitally controlled variable gain amplifier (VGA), black level clamp, and A/D converter. The AD9841A offers 10-bit ADC resolution, while the AD9842A contains a true 12-bit ADC. Additional input modes are provided for processing analog video signals.
The internal registers are programmed through a 3-wire serial digital interface. Programmable features include gain adjustment, black level adjustment, input configuration, and power-down modes. The AD9841A and AD9842A operate from a single 3 V power supply, typically dissipate 78 mW, and are packaged in a 48- lead LQFP.

   20 MSPS Correlated Double Sampler (CDS)
   4 dB ± 6 dB 6-Bit Pixel Gain Amplifier (PxGA®)
   2 dB to 36 dB 10-Bit Variable Gain Amplifier (VGA)
   Low Noise Clamp Circuits
   Analog Preblanking Function
   10-Bit (9841) or 12-Bit (9842) 20 MSPS A/D Converter
   Auxiliary Inputs with VGA and Input Clamp
   3-Wire Serial Digital Interface
   3 V Single Supply Operation
   Low Power: 65 mW @ 2.7 V Supply
   48-Lead LQFP Package

   Digital Still Cameras
   Digital Video Camcorders

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