AD9841AJSTZ

Overview

The AD9841AJSTZ is a single-channel analog front-end processor designed for CCD signal conditioning. It features a 20 MHz sampling rate and a 10-bit A/D converter with straight binary output coding. The device operates on a single 3 V supply, consuming 78 mW in normal mode. Key specifications include a maximum clock rate of 20 MHz, an operating temperature range of -20°C to +85°C, and a 48-lead LQFP package.

Feature Summary

• Integrates a complete signal chain including input clamp, correlated double sampler (CDS), Pixel Gain Amplifier (PxGA), variable gain amplifier (VGA), and black level clamp.
• Features a 6-bit PxGA for per-pixel color gain adjustment and a 10-bit VGA providing 2 dB to 36 dB gain control.
• Includes low noise clamp circuits and an analog preblanking function for accurate signal processing.
• Configurable via a 3-wire serial digital interface for programmable gain, black level adjustment, and power-down modes.

Applications

• Digital Still Cameras
• Digital Video Camcorders

Procurement Notes

Verify the component status as discontinued before initiating procurement. Confirm that the JSTZ suffix denotes the specific commercial temperature grade (-20°C to +85°C) and lead-free packaging variant. Ensure compatibility with existing system designs given the end-of-life status.

Selection Notes

Select this model over the AD9842A when a 10-bit resolution is sufficient for the application. Verify that the 20 MHz maximum clock rate meets the CCD array timing requirements. Ensure the design accommodates the 48-lead LQFP footprint and single 3 V supply constraints.

Part Context

This component belongs to the AD9841A/AD9842A family of complete CCD signal processors. It shares the same architecture and pinout as the AD9842A, differing primarily in ADC resolution. Both devices are designed for interlaced and progressive scan area CCD arrays.

Replacement Considerations

Public confirmed substitute part numbers: AD9842AJSTZ.