ADCDS-1405

The ADCDS-1405 is an application-specific video signal processor designed for electronic-imaging applications that employ CCD's (charge coupled devices) as their photodetector. The ADCDS-1405 incorporates a "user configurable" input amplifier, a CDS (correlated double sampler) and a sampling A/D converter in a single package, providing the user with a complete, high performance, lowcost, low-power, integrated solution.

The key to the ADCDS-1405's performance is a unique, highspeed, high-accuracy CDS circuit, which eliminates the effects of residual charge, charge injection and "kT/C" noise on the CCD's output floating capacitor, producing a "valid video" output signal. The ADCDS-1405 digitizes this resultant "valid video" signal using a high-speed, low-noise sampling A/D converter.

The ADCDS-1405 requires only the rising edge of start convert pulse to initiate its conversion process. Additional features of the ADCDS-1405 include gain adjust, offset adjust, precision +2.4V reference, and a programmable analog bandwidth function.