AD9822JRSZ

Overview

The AD9822JRSZ is a complete analog signal processor for CCD imaging applications, featuring a 3-channel architecture designed to sample and condition outputs of trilinear color CCD arrays. It integrates a 14-bit ADC operating at up to 15 MSPS in 3-channel mode or 12.5 MSPS in 1-channel mode. The device includes input clamp circuitry, correlated double sampling (CDS), programmable gain amplifiers (PGA) with gains from 1× to 5.7×, and offset DACs adjustable from -350 mV to +350 mV. It operates on a single 5 V supply, consuming typically 385 mW, and provides multiplexed byte-wide digital output via a 3-wire serial interface.

Feature Summary

• Integrates three independent channels with input clamps, CDS amplifiers, offset DACs, and PGAs multiplexed to a high-performance 14-bit ADC.
• Supports flexible operation modes including 3-channel CDS, 3-channel SHA, 1-channel CDS, and 1-channel SHA.
• Features a 3-wire serial digital interface for programming gain, offset, and operating modes.
• Includes internal voltage reference and input clamp circuitry with selectable bias levels.

Applications

• Flatbed document scanners
• Film scanners
• Digital color copiers
• Multifunction peripherals

Procurement Notes

Verify the specific suffix JRSZ corresponds to the 28-lead SSOP package variant. Confirm RoHS compliance status as per current manufacturer documentation. Check component availability and lifecycle status through authorized distributors, as lead times and stock levels fluctuate. Ensure ESD precautions are observed during handling due to device sensitivity.

Selection Notes

Select this component for applications requiring simultaneous processing of trilinear CCD signals with integrated signal conditioning. Verify that the required sampling rate fits within the 15 MSPS limit for 3-channel operation or 12.5 MSPS for 1-channel mode. Ensure the system design accommodates the single 5 V power supply requirement and the specific pinout of the 28-SSOP package.

Part Context

The AD9822 belongs to Analog Devices' family of CCD/CIS signal processors. The JRSZ suffix specifically denotes the 28-lead SSOP package version, distinguishing it from the SOIC package variant. This component serves as an analog front-end solution, bridging image sensors and digital processing units in scanning and copying equipment.

Replacement Considerations

Public confirmed substitute part numbers: AD9826KRSZ (16-bit resolution, similar package).