AD9807

a FEATURES Pin Compatible 12-Bit and 10-Bit Versions 12-Bit/10-Bit 6 MSPS A/D Converter Integrated Triple Correlated Double Sampler 3-Channel, 2 MSPS Color Mode 1 ؋ – 4؋ Analog Programmable Gain Amplifier Pixel-Rate Digital Gain Adjustment Pixel-Rate Digital Offset Adjustment Internal Voltage Reference No Missing Codes Guaranteed Microprocessor-Compatible Control Interface +3.3 V/+5 V Digital I/O Compatibility Low Power CMOS: 500 mW 64-Pin PQFP Surface Mount Package Complete 12-Bit/10-Bit 6 MSPS CCD/CIS Signal Processors AD9807/AD9805 FUNCTIONAL BLOCK DIAGRAM VREF PIXEL PIXEL OFFSET GAIN AD9807/AD9805 VINR RED CDS PGA REF GREEN VING CDS PGA MUX ADC 12-10 GAIN REGISTERS 8-10 12-10 – X DOUT CSB VINB BLUE CDS PGA INPUT OFFSET CONFIG REGS ODD EVEN MPU MPU PORT PORT RD WR A2 A1 A0 CDSCLK1 CDSCLK2 ADCCLK PRODUCTION DESCRIPTION The AD9807 and AD9805 are complete CCD/CIS imaging decoders and signal processors on a single monolithic integrated circuit. The input of the AD9807/AD9805 allows direct ac coupling of the charge-coupled device (CCD) or contact image sensor (CIS) output(s). The AD9807/AD9805 includes all the circuitry to perform three-channel correlated double sampling (CDS) and programmable gain adjustment of the CCD output; a 12-bit or 10-bit analog-to-digital converter (ADC) quantizes the analog signal. After digitization, the on-board digital signal processor (DSP) circuitry allows pixel rate offset and gain correction. The DSP also corrects odd/even CCD reg...