AD669ARZ-REEL

Overview

The AD669ARZ-REEL is a monolithic 16-bit Digital-to-Analog Converter (DAC) from Analog Devices, manufactured using the BiMOS II process. This technology integrates low-power CMOS logic with high-precision bipolar linear circuits on a single chip. The device features an on-chip output amplifier and a buried Zener reference, eliminating external component requirements for basic operation. It accepts 16-bit parallel data inputs via double-buffered latches, which facilitate synchronized updates in multi-DAC systems. Key electrical specifications include a settling time of 6 µs, a signal-to-noise ratio (SNR) of 83 dB, and a total harmonic distortion plus noise (THD+N) of 0.009%. The unit operates within a temperature range of -40°C to +85°C and is supplied in a tape-and-reel packaging format.

Feature Summary

• Monolithic 16-bit resolution with ±2 LSB integral and differential nonlinearity errors.
• Integrated high-stability buried Zener reference and current-switching architecture.
• Double-buffered latch structure enabling glitch-free synchronous updates across multiple channels.
• Low output noise voltage of 120 nV/√Hz and fast 40 ns write pulse capability.

Applications

• High-fidelity audio processing systems requiring low THD+N.
• Precision test and measurement equipment utilizing stable DC references.
• Industrial control loops demanding 15-bit monotonicity over temperature.
• Multi-channel data acquisition systems requiring synchronized DAC updates.

Procurement Notes

Verify the specific suffix 'REEL' confirms tape-and-reel packaging rather than tube or tray formats when sourcing. Confirm the 'A' grade designation aligns with the required operating temperature range of -40°C to +85°C. Ensure compatibility with standard 5V digital logic levels for the parallel interface. Check for moisture sensitivity level (MSL) requirements if storage conditions exceed manufacturer guidelines prior to assembly.

Selection Notes

Select this component for applications requiring integrated reference and amplifier functionality to reduce board space. The parallel interface necessitates sufficient microprocessor GPIO lines or shift registers. Consider the 625 mW power dissipation limit for thermal management in enclosed enclosures. Verify that the 167 kS/s update rate meets the bandwidth requirements of the target analog signal path.

Part Context

The AD669 belongs to the DACPORT family, characterized by complete D/A conversion functions on a single die. The ARZ variant denotes the commercial temperature grade and RoHS-compliant lead-free construction. The REEL suffix indicates bulk packaging for automated surface-mount assembly, distinct from the manual-handling tube packaging found in other variants like the AD669BRZ.

Replacement Considerations

Direct pin-compatible replacements within the same family include the AD669AR and AD669BR. For serial interface alternatives, consider the AD660 series, though architectural differences require interface redesign. Cross-brand equivalents may exist but require verification of pinout, voltage ranges, and linearity specifications against the original datasheet.