AD669SQ/883B

Overview

The AD669SQ/883B is a complete 16-bit single-chip digital-to-analog converter manufactured by Analog Devices Inc. utilizing BiMOS II technology. It integrates an internal reference voltage source, output amplifier, current switches, decoding logic, and dual-buffered latches. The device ensures 15-bit monotonicity across the full temperature range with integral nonlinearity of ±0.003% and differential nonlinearity of ±0.003%. It features a low glitch impulse of 15 nV-s and total harmonic distortion plus noise of 0.009%. The SQ/883B variant operates within a military-grade temperature range of -55°C to +125°C and is housed in a 28-pin sealed ceramic DIP package.

Feature Summary

• 16-bit resolution with 15-bit guaranteed monotonicity over the entire operating temperature range
• Integrated high-stability embedded Zener reference voltage source and output amplifier
• Dual-buffered latch structure eliminates data skew errors and enables simultaneous multi-DAC updates
• Low glitch energy of 15 nV-s and THD+N of 0.009%

Applications

• High-precision servo control systems requiring wide temperature stability
• Military and aerospace instrumentation demanding MIL-STD-883 compliance
• Multi-channel data acquisition systems utilizing simultaneous update capabilities
• Precision waveform generation where low distortion is critical

Part Context

The AD669 belongs to the DACPORT family of monolithic D/A converters. The 'SQ' suffix denotes the military temperature grade (-55°C to +125°C) and the '/883B' indicates compliance with MIL-STD-883 standards for screening and testing. This specific part number represents the hermetically sealed ceramic DIP version designed for harsh environments.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify pin compatibility and performance specifications against alternative 16-bit DACs if sourcing this discontinued or limited-stock component.