PRODUCT DESCRIPTION

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.

FEATURES

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

APPLICATIONS

Digital Still Cameras

Digital Video Camcorders

AD9841AJST屬于集成電路（IC） > 傳感器和檢測(cè)器接口。亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD9841AJST傳感器和檢測(cè)器接口該系列產(chǎn)品可執(zhí)行信號(hào)調(diào)節(jié)、數(shù)據(jù)轉(zhuǎn)換、激勵(lì)生成和/或各種將傳感器或變送器機(jī)構(gòu)連接到主機(jī)設(shè)備所需的其他功能。示例包括用于 CCD 圖像傳感器的控制器、用于 4-20 mA 接口和類似應(yīng)用的電流變送器、超聲變送器前端、惠斯通電橋接口等。