AD9807 General 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 correc-tion. The DSP also corrects odd/even CCD register imbalance errors. A parallel control bus provides a simple interface to 8-bit microcontrollers. The AD9807/AD9805 comes in a space saving 64-pin plastic quad flatpack (PQFP) and is specified over the commercial (0°C to +70°C) temperature range. By disabling the CDS, the AD9807/AD9805 are also suitable for non-CCD applications, or applications that do not require CDS, such as CIS signal processing.
AD9807 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
AD9807 Connection Diagram
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