AD668SQ/883B

Overview

The AD668SQ/883B is a high-performance, monolithic 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. Designed for demanding applications requiring fast sampling rates and high dynamic range, this component utilizes BiMOS technology to integrate precision analog circuits with CMOS logic on a single chip. The SQ/883B suffix indicates a military-grade version compliant with MIL-STD-883 standards, featuring a hermetically sealed ceramic dual in-line package (CDIP). It supports parallel data output and includes internal reference and clocking capabilities to simplify system design.

Feature Summary

• 12-bit resolution with high-speed parallel data output
• Monolithic BiMOS construction for low power and high speed
• Internal voltage reference and sample-and-hold amplifier
• MIL-STD-883 qualified hermetic ceramic package

Applications

• High-resolution radar systems
• Electronic warfare signal processing
• Medical imaging equipment
• Test and measurement instrumentation

Procurement Notes

Verify the specific revision level and lot traceability when sourcing this military-grade component. Ensure that the supplier provides valid MIL-STD-883 certification documentation. Check for any process change notices (PCNs) that might affect pin compatibility or electrical specifications over time.

Selection Notes

Select the AD668SQ/883B when a 12-bit ADC with high sampling speed and strict environmental reliability is required. Compare against lower-resolution alternatives if cost is a primary constraint, or higher-resolution models if bit accuracy outweighs speed requirements. Ensure the system interface supports the parallel data bus architecture.

Part Context

This part belongs to the AD668 family of high-speed ADCs from Analog Devices. The 'SQ' designation typically denotes a space/military grade variant, while '/883B' confirms compliance with the MIL-STD-883 test method standard for integrated circuits. It serves as a bridge between analog signals and digital processing in harsh environments.

Replacement Considerations

Direct replacements must match the 12-bit resolution, sampling rate, and CDIP-28 package. Verify pinout compatibility before substituting with other high-speed ADCs from Analog Devices or competitors. Consider thermal management differences if replacing with plastic-packaged variants.