AD9944KCPRL

Overview

The AD9944KCPRL is a complete 12-bit, 25 MHz CCD signal processor designed for digital imaging applications. It integrates a correlated double sampler (CDS), a variable gain amplifier (VGA) with 6 dB to 40 dB range, an optical black clamp circuit, and a true 12-bit analog-to-digital converter (ADC). The device operates from a single 3 V supply, typically dissipating 79 mW in normal mode. It features a 3-wire serial interface for register configuration and is housed in a space-saving 32-lead 5 mm × 5 mm LFCSP package.

Feature Summary

• Integrates a 25 MSPS correlated double sampler and a low noise optical black clamp circuit for effective noise reduction.
• Includes a digitally controlled variable gain amplifier providing a programmable gain range of 6 dB to 40 dB.
• Features a true 12-bit pipelined ADC with guaranteed no missing codes and straight binary output coding.
• Supports system configuration via a 3-wire serial digital interface controlling gain, black level, and power modes.

Applications

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

Procurement Notes

Verify the specific suffix 'RL' against official documentation to confirm reel packaging status, as datasheets may list standard bulk options. Ensure compatibility with the 32-lead LFCSP footprint and thermal requirements. Confirm that the operating temperature range meets the application's environmental specifications before procurement.

Selection Notes

Select the AD9944 over the AD9943 when 12-bit resolution is required for higher dynamic range. Verify that the input signal amplitude fits within the 1.0 V p-p maximum range before saturation. Ensure the system timing generator can provide the necessary SHP, SHD, and DATACLK signals at up to 25 MHz.

Part Context

The AD9944 is part of the Analog Devices CCD signal processor family, paired with the 10-bit AD9943. Both devices share identical architectures and pinouts but differ in ADC resolution. They are designed to process interlaced and progressive scan area CCD arrays, offering a compact solution for analog front-end conditioning in portable imaging systems.

Replacement Considerations

The AD9943KCPZRL serves as a lower-resolution alternative if 10-bit performance is sufficient. No direct functional equivalents with different interfaces or resolutions are documented in the provided source material.