AD9943KCP

Overview

The AD9943KCP is a complete analog signal processor for CCD applications, featuring a 25 MHz single-channel architecture. It integrates a correlated double sampler (CDS), a digitally controlled variable gain amplifier (VGA) with 6 dB to 40 dB range, and a black level clamp. The device includes a 10-bit A/D converter operating at up to 25 MSPS with no missing codes guaranteed. It operates from a single 3 V supply, typically dissipating 79 mW in normal mode and 150 µW in power-down mode. The unit is housed in a space-saving 32-lead 5 mm × 5 mm LFCSP package.

Feature Summary

• Integrates a 25 MSPS correlated double sampler (CDS) for noise rejection.
• Features a 10-bit variable gain amplifier (VGA) with programmable gain control.
• Includes a low-noise optical black clamp circuit for DC restoration.
• Utilizes a 3-wire serial digital interface for internal register programming.

Applications

• Digital still cameras
• Digital video camcorders
• PC cameras
• Portable CCD imaging devices
• CCTV cameras

Procurement Notes

Verify the specific ordering suffix when sourcing components. The provided model designation lacks the standard packaging or temperature grade suffixes found in official documentation. Confirm whether the required unit is the tape-and-reel variant (AD9943KCPZRL) or the tray-packaged version (AD9943KCPZ). Ensure the component meets the specified -20°C to +85°C operating temperature range before integration.

Selection Notes

Select this component for applications requiring a complete analog front end for interlaced or progressive scan area CCD arrays. The AD9943 provides 10-bit resolution, whereas the AD9944 offers 12-bit resolution; choose based on image quality requirements. Consider the 3 V single-supply operation and low power consumption for portable designs. Verify compatibility with the target system's timing generator and serial interface constraints.

Part Context

The AD9943 is part of the AD9943/AD9944 family of complete analog signal processors designed specifically for CCD applications. These devices are engineered to sample and condition outputs from CCD arrays, offering integrated signal processing capabilities including CDS, VGA, and ADC functions within a compact package.

Replacement Considerations

The AD9944KCPZ serves as a direct functional substitute with identical pinout and features but provides 12-bit ADC resolution instead of 10-bit. Verify that the increased resolution aligns with system requirements and that no software adjustments are needed for the additional data bits.