AD669SQ

Overview

The AD669SQ is a complete 16-bit monolithic DACPORT® number-to-analog converter manufactured on Analog Devices’ BiMOS II process. It integrates current switches, decoding logic, an output amplifier, and a buried Zener reference voltage source within a single chip. The SQ grade operates over an extended temperature range of –55°C to +125°C and utilizes a hermetic 28-pin cerdip package. Key electrical specifications include ±0.003% integral nonlinearity, ±0.003% maximum differential nonlinearity, and 15-bit monotonicity across the full temperature range. The device features a pin-programmable output range selectable between 0 V to +10 V unipolar or –10 V to +10 V bipolar configurations.

Feature Summary

• Complete 16-bit D/A function with on-chip output amplifier and high-stability buried Zener reference
• Monolithic BiMOS II construction ensuring 15-bit monotonicity over temperature
• Double-buffered latches eliminate data skew errors and enable simultaneous multi-DAC updates
• Pin-programmable unipolar (0 V to +10 V) or bipolar (–10 V to +10 V) output ranges

Applications

• Signal generation applications requiring low THD+N and high SNR
• Multi-DAC systems requiring simultaneous data updating via double-buffered architecture
• Precision control systems operating in extreme environments (-55°C to +125°C)
• Microprocessor interfaces utilizing TTL/LSTTL/5 V CMOS compatible digital inputs

Procurement Notes

Verify that the specific orderable part number includes the 'SQ' suffix to confirm the –55°C to +125°C temperature rating and hermetic cerdip packaging. Standard grades such as AN, AR, BN, or BR operate at –40°C to +85°C and utilize plastic DIP or SOIC packages. Confirm MIL-STD-883 compliance requirements separately, as this typically corresponds to the AD669/883B variant rather than the commercial SQ grade.

Selection Notes

Select the AD669SQ when operation beyond standard industrial temperatures is required. The SQ grade provides specified performance from –55°C to +125°C, whereas AN, AR, BN, and BR grades are limited to –40°C to +85°C. Ensure the application can accommodate the 28-pin cerdip package dimensions. For military-grade reliability standards, consult the AD669/883B datasheet instead of the commercial SQ specification.

Part Context

The AD669 family comprises seven distinct grades differentiated by temperature range and package type. The SQ version specifically denotes the high-temperature commercial grade housed in a hermetic ceramic dual in-line package. Other variants include plastic DIP (AN, BN), SOIC (AR, BR), and Cerdip (AQ, BQ). All versions share the same core 16-bit DACPORT architecture but vary in environmental robustness and physical form factor.

Replacement Considerations

Public confirmed substitute part numbers: AD3541RNEW, AD3542RNEW, LTC2686, LTC2688-16, AD5766, AD5753, AD5767, LTC2664-12, LTC2664-16, LTC2666-12, LTC2666-16, AD5761, AD5721, AD5761R, AD5721R, LTC2668-12, LTC2668-16, AD5760, AD5780, AD5790, AD5512A, AD5542A, AD5781, AD5791, AD5724R, AD5722R, AD5732R, AD5734R, AD5752R, AD5754R, AD5762R.