AD660SQ

Overview

The AD660SQ is a single 16-bit monolithic digital-to-analog converter from the DACPORT family, manufactured using BiMOS II technology. It integrates an on-chip buried Zener voltage reference, double-buffered latches, and a buffered output amplifier. The device supports serial or byte input interfaces and offers pin-programmable unipolar (0 V to 10 V) or bipolar (−10 V to +10 V) output ranges. Designed for military specifications under MIL-STD-883, it operates within a temperature range of −55°C to +125°C in a 24-lead CERDIP package.

Feature Summary

• 16-bit resolution with ±1 LSB integral nonlinearity and 15-bit monotonicity over temperature.
• Integrated laser-trimmed 10.000 V buried Zener reference with ±15 ppm/°C drift.
• Double-buffered latches enable simultaneous multi-DAC updates and eliminate data skew.
• Asynchronous clear function sets output to 0 V regardless of mode.

Applications

• Military-grade data acquisition systems requiring high reliability.
• Precision instrumentation with strict linearity and monotonicity requirements.
• Multi-channel DAC arrays utilizing daisy-chain serial configurations.
• Harsh environment applications operating between −55°C and +125°C.

Procurement Notes

Verify that the specific part number includes the required MIL-STD-883 compliance documentation if military qualification is mandatory. Confirm the package type is the 24-lead CERDIP variant suitable for the specified temperature range. Check for any specific lot traceability requirements associated with the SQ grade designation.

Selection Notes

Select the AD660SQ when extended temperature operation down to −55°C is required, as opposed to the commercial AN/BN grades rated for −40°C. Ensure the application benefits from the integrated reference and buffer to minimize external component count. Consider the R-2R architecture and SPI-compatible interface for system integration compatibility.

Part Context

The AD660 belongs to Analog Devices' DACPORT family, which combines high-precision bipolar linear circuits with low-power CMOS logic on a single chip. The SQ grade specifically denotes the ceramic DIP package version designed for ruggedized and military environments, distinct from the plastic DIP (AN/BN) and SOIC (AR/BR) variants.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.