AD9943KCPZ

Overview

The AD9943KCPZ 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, an optical black clamp circuit, and a 10-bit 25 MSPS A/D converter. The device operates from a single 3 V supply, typically dissipating 79 mW, and includes programmable features such as gain adjustment, black level control, input clock polarity, and power-down modes accessed via a 3-wire serial digital interface.

Feature Summary

• Integrates a correlated double sampler (CDS) and a low noise optical black clamp circuit for signal conditioning.
• Includes a digitally controlled variable gain amplifier (VGA) with 10-bit resolution for precise gain adjustment.
• Features a 10-bit pipelined A/D converter with guaranteed no missing codes and a 2 V full-scale input range.
• Provides a 3-wire serial digital interface for programming internal registers including gain, offset, and timing.

Applications

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

Procurement Notes

Verify the specific ordering suffix KCPZ corresponds to the standard 32-lead LFCSP package variant. Confirm that the component meets RoHS3 compliance requirements if applicable to your manufacturing standards. Check for any specific moisture sensitivity level (MSL) handling instructions required during assembly, as indicated in the datasheet specifications.

Selection Notes

Select the AD9943KCPZ when a 10-bit resolution is sufficient for the CCD application, distinguishing it from the 12-bit AD9944 variant. Ensure the system design supports a single 3 V supply voltage and accommodates the 32-lead LFCSP package dimensions. Verify that the maximum sampling rate of 25 MHz aligns with the target CCD pixel clock frequency.

Part Context

The AD9943KCPZ belongs to the Analog Devices AD9943/AD9944 family of complete CCD signal processors. These devices are designed to simplify the analog front-end design for CCD imaging systems by integrating essential signal conditioning functions into a single chip, reducing component count and board space requirements.

Replacement Considerations

The AD9944KCPZ serves as a direct pin-compatible alternative offering 12-bit ADC resolution instead of 10-bit. Designers requiring higher dynamic range may consider this substitution while maintaining the same package and interface compatibility.