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AD9944

Features: ·25 MSPS correlated double sampler (CDS)·6 dB to 40 dB 10-bit variable gain amplifier (VGA)·Low noise optical black clamp circuit·Preblanking function·10-bit (AD9943), 12-bit (AD9944) 25 MSPS A/D converter·No missing codes guaranteed·3-wire serial digital interface·3 V single-supply oper...

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SeekIC No. : 004273719 Detail

AD9944: Features: ·25 MSPS correlated double sampler (CDS)·6 dB to 40 dB 10-bit variable gain amplifier (VGA)·Low noise optical black clamp circuit·Preblanking function·10-bit (AD9943), 12-bit (AD9944) 25 M...

AD9944 Data Sheet

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Part Number:
AD9944
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/4/27

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Product Details

Description



Features:

·25 MSPS correlated double sampler (CDS)
·6 dB to 40 dB 10-bit variable gain amplifier (VGA)
·Low noise optical black clamp circuit
·Preblanking function
·10-bit (AD9943), 12-bit (AD9944) 25 MSPS A/D converter
·No missing codes guaranteed
·3-wire serial digital interface
·3 V single-supply operation
·Space-saving 32-lead 5 mm × 5 mm LFCSP package


Application

·Digital still cameras
·Digital video camcorders
·PC cameras
·Portable CCD imaging devices
·CCTV cameras


Specifications

Parameter (With Respect To) Min Max Unit
AVDD (AVSS)
DVDD (DVSS)
DRVDD (DRVSS)
Digital Outputs (DRVSS)
SHP, SHD, DATACLK (DVSS)
CLPOB, PBLK (DVSS)
SCK, SL, SDATA DVSS (AVSS)
REFT, REFB, CCDIN
Junction Temperature
Lead Temperature (10 sec)		 −0.3
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3
−0.3


 +3.9
+3.9
+3.9
DRVDD + 0.3
DVDD + 0.3
DVDD + 0.3
DVDD + 0.3
AVDD + 0.3
150
300		 V
V
V
V
V
V
V
V
°C
°C



Description

The AD9943/AD9944 are complete analog signal processors for CCD applications. They feature a 25 MHz single-channel architecture designed to sample and condition the outputs of interlaced and progressive scan area CCD arrays. The signal chain for the AD9943/AD9944 consists of a correlated double sampler (CDS), a digitally controlled variable gain amplifier (VGA), and a black level clamp. The AD9943 offers 10-bit ADC resolution, while the AD9944 contains a true 12-bit ADC.

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 AD9943/AD9944 operate from a single 3 V power supply, typically dissipate 79 mW, and are packaged in space-saving 32-lead LFCSP packages.




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