AD9944KCPZRL

Overview

The AD9944KCPZRL is a complete analog signal processor for CCD applications, featuring a true 12-bit A/D converter. It operates at a maximum sampling rate of 25 MSPS with a single-channel architecture. The device includes a correlated double sampler (CDS), a variable gain amplifier (VGA) with 6 dB to 40 dB range, and an optical black clamp circuit. It functions on a single 3 V supply (2.7 V to 3.6 V), dissipating typically 79 mW. Configuration is managed via a 3-wire serial interface. The component is housed in a space-saving 32-lead 5 mm × 5 mm LFCSP package.

Feature Summary

• Integrated 12-bit pipelined ADC with guaranteed no missing codes
• Digitally controlled variable gain amplifier with 10-bit resolution
• On-chip optical black clamp loop for low-frequency noise tracking
• Single 3 V power supply operation with low power consumption

Applications

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

Procurement Notes

Verify the specific ordering suffix KCPZRL against the manufacturer's current documentation to confirm tape-and-reel packaging status. Confirm that the component meets RoHS3 compliance requirements as specified in the datasheet. Ensure the operating temperature range of -20°C to +85°C aligns with system thermal constraints before finalizing procurement.

Selection Notes

Select the AD9944KCPZRL when a 12-bit resolution is required for CCD signal processing. Compare it against the AD9943 if only 10-bit resolution is sufficient, noting the difference in clamp level ranges. Ensure the design supports the 3-wire serial interface timing requirements and provides adequate decoupling for the 3 V analog and digital supplies.

Part Context

The AD9944 is part of the Analog Devices AD9943/AD9944 family of complete CCD signal processors. It shares the same functional block diagram and pinout as the AD9943, differing primarily in ADC resolution and clamp capabilities. Both devices utilize the same 32-lead LFCSP package and are designed for interlaced and progressive scan area CCD arrays.

Replacement Considerations

The AD9943KCPZRL serves as a lower-resolution alternative within the same package. Verify compatibility regarding the 12-bit data output pins D0 and D1, which are active on the AD9944 but unused on the AD9943.