AD9940

The AD9940 is a high speed, correlated double sampler for high speed digital imaging applications. Integrated with a programmable timing driver using the Precision Timing core, the AD9940 features a 56 MHz CDS amplifier with 6 dB of fixed gain, an internal voltage reference supply, and timing control for all the high speed clocks necessary for CCD imaging systems. The Precision Timing core allows adjustment of high speed clocks with a resolution of 0.37 ns. Output buffers are also included, providing drive strength for PCB traces and direct connection to an image signal processor such as the AD9941.

The AD9940 is ideal for applications that need to place the CDS and VGA/ADC circuits on separate PC boards. The fully differential outputs of the AD9940 provide good signal integ-rity when interfaced with the differential input AD9941. The AD9940 operates from a single 2.7 V power supply, typically dissipates 105 mW (excluding the H/RG drive current), and is packaged in 48-lead LQFP and 48-lead LFCSP packages.

Applications

• Professional HDTV camcorders
• Professional/high end digital cameras
• Broadcast cameras
• Industrial high speed cameras
• High speed data-acquisition systems