AD9814JR

Overview

The AD9814JR is a complete analog signal processor for CCD imaging applications, featuring a 3-channel architecture designed to sample and condition outputs from trilinear color CCD arrays. It integrates input clamps, Correlated Double Samplers (CDS), offset DACs, and Programmable Gain Amplifiers (PGA) multiplexed into a 14-bit A/D converter. The device operates at up to 10 MSPS in 3-channel mode or 7 MSPS in 1-channel mode. Key specifications include a 14-bit ADC resolution with no missing codes guaranteed to 14 bits, PGA gain range of 1x to 5.8x, and programmable offset adjustment from -300 mV to +300 mV. It functions on a single +5 V supply with typical power dissipation of 330 mW.

Feature Summary

• Integrates three independent channels with input clamp, CDS, offset DAC, and PGA for simultaneous red, green, and blue signal processing.
• Features a high-performance 14-bit successive approximation A/D converter with guaranteed monotonicity and no missing codes.
• Supports flexible operation modes including 3-Channel CDS, 3-Channel SHA, 1-Channel CDS, and 1-Channel SHA via serial configuration.
• Includes internal voltage reference and 3-wire serial digital interface for programming gain, offset, and operating parameters.

Applications

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

Procurement Notes

Verify the specific grade suffix (J or K) required for your temperature range needs, as both fall within the commercial range. Confirm package availability since the AD9814 series has been discontinued by Analog Devices. Ensure ESD precautions are strictly followed during handling due to the device's sensitivity. Check for alternative components if long-term supply continuity is a critical design constraint.

Selection Notes

Select the AD9814JR when designing systems requiring integrated signal conditioning for trilinear CCD sensors. Choose this component over discrete solutions to reduce board space and simplify timing requirements for CDS operations. Consider the 28-lead SOIC package constraints and ensure adequate thermal management for the specified power dissipation levels under maximum clock rates.

Part Context

The AD9814 is part of Analog Devices' family of CCD signal processors, specifically targeting color imaging applications. It serves as a bridge between analog CCD outputs and digital processing units. The 'JR' suffix denotes the commercial temperature range variant housed in a standard 28-lead SOIC package, distinguishing it from other grades or packages within the broader AD9814 product line.

Replacement Considerations

The AD9814 series is listed as obsolete/discontinued. No direct public substitute part numbers are confirmed in the provided documentation. Designers should evaluate newer generation CCD signal processors or integrate discrete CDS and ADC components to maintain functionality.