AD9944KCP

Overview

The AD9944KCP is a complete analog signal processor for CCD applications, featuring a single-channel architecture designed to sample and condition outputs from interlaced and progressive scan area CCD arrays. 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 true 12-bit, 25 MSPS A/D converter with no missing codes guaranteed. It operates from a single 3 V supply, typically dissipating 79 mW, and is housed in a space-saving 32-lead 5 mm × 5 mm LFCSP package.

Feature Summary

• Integrates a 12-bit, 25 MSPS pipelined A/D converter with guaranteed no missing codes.
• Includes a correlated double sampler (CDS) and low noise optical black clamp circuit.
• Features a digitally controlled variable gain amplifier (VGA) with 10-bit resolution control.
• Operates from a single 3 V power supply with programmable power-down modes.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current data sheet to confirm package type and temperature range. Confirm availability status as distribution channels may vary. Ensure the component matches the required 32-lead LFCSP form factor and 3 V single-supply operation specifications for your design.

Selection Notes

Select the AD9944KCP when a 12-bit resolution is required for CCD signal processing at speeds up to 25 MHz. Compare against the AD9943 if 10-bit resolution suffices, as both share identical pinouts and functionality except for ADC bit depth. Ensure the system timing generator supports the necessary SHP, SHD, and DATACLK clock requirements.

Part Context

The AD9944 is part of the Analog Devices AD9943/AD9944 family of complete analog front-end processors. While the AD9943 offers 10-bit resolution, the AD9944 provides true 12-bit conversion. Both devices share the same signal chain architecture, including CDS, VGA, and black level clamp, making them interchangeable in terms of interface and control logic.

Replacement Considerations

The AD9943 serves as a lower-resolution alternative within the same package and interface scheme. Verify that the 12-bit output width of the AD9944 is compatible with the downstream digital image processing ASIC or microprocessor input pins.