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FEATURES 18 MSPS Correlated Double Sampler (CDS) 6 dB to 40 dB 10-Bit Variable Gain Amplifier (VGA) Low Noise Clamp Ci...
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FEATURES 18 MSPS Correlated Double Sampler (CDS) 6 dB to 40 dB 10-Bit Variable Gain Amplifier (VGA) Low Noise Clamp Circuits Preblanking Function 10-Bit 18 MSPS A/D Converter 3-Wire Serial Digital Interface 3 V Single Supply Operation Low Power
CMOS 48-Lead LQFP Package APPLICATIONS PC Cameras Digital Still Cameras
Complete 10-Bit 18 MSPS CCD Signal Processor AD9804
FUNCTIONAL BLOCK DIAGRAM
PBLK AVDD AVSS CLPOB DRVDD CLP 6dB TO 40dB CDS VGA 10-BIT ADC 10 DOUT DRVSS
CCDIN
CLP BANDGAP REFERENCE CLPDM 10 INTERNAL BIAS
VR T VRB
VGA GAIN REGISTER
CML
DVDD
AD9804
DIGITAL INTERFACE
INTERNAL TIMING
DVSS
PRODUCT DESCRIPTION
The AD9804 is a complete analog signal processor for CCD applications. It features an 18 MHz single-channel architecture designed to sample and condition the outputs of interlaced and progressive scan area CCD arrays. The AD9804’s signal chain consists of an input clamp, correlated double sampler (CDS), digitally controlled VGA, black level clamp, and a 10-bit A/D converter. The internal VGA gain register is programmed through a 3-wire serial digital interface.
SL SCK
SDATA SHP SHD DATACLK
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