AD9944KCPZ

Overview

The AD9944KCPZ is a complete analog signal processor for CCD applications, featuring a 12-bit, 25 MSPS A/D converter. It integrates a correlated double sampler (CDS), a variable gain amplifier (VGA) with 6 dB to 40 dB range, and an optical black clamp circuit. The device operates from a single 3 V supply, typically dissipating 79 mW. It utilizes a 3-wire serial digital interface for register programming and is housed in a space-saving 32-lead 5 mm × 5 mm LFCSP package.

Feature Summary

• Integrates a 12-bit pipelined ADC with guaranteed no missing codes.
• Includes a digitally controlled VGA offering 10-bit resolution gain adjustment.
• Features an on-chip optical black clamp loop for low-frequency offset tracking.
• Provides programmable timing drivers and internal power-on reset functionality.

Applications

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

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or direct manufacturer channels. Confirm the specific suffix KCPZ corresponds to the lead-free 32-lead LFCSP package variant. Request original datasheets and material declarations to ensure compliance with current RoHS standards before finalizing procurement agreements.

Selection Notes

Select the AD9944KCPZ when a 12-bit resolution is required for CCD signal processing at speeds up to 25 MHz. Ensure the system design accommodates the 32-lead LFCSP footprint and provides adequate thermal dissipation for the exposed pad. Verify that the host controller supports the 3-wire serial interface protocol for necessary register configuration and control operations.

Part Context

The AD9944 belongs to the AD994x family of CCD signal processors, sharing architectural similarities with the AD9943. While the AD9943 offers 10-bit resolution, the AD9944 provides enhanced 12-bit performance within the same 32-lead LFCSP package. Both devices target similar imaging applications but differ primarily in ADC resolution and associated noise specifications.

Replacement Considerations

The AD9943KCPZ serves as a lower-resolution alternative within the same package. For tape and reel packaging options, the AD9944KCPZRL variant is available. No other direct functional substitutes are documented in the provided source material.