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...
AD9943: 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...
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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 |
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.