AD660BR-REEL

Overview

The AD660BR-REEL is a monolithic 16-bit digital-to-analog converter (DAC) from Analog Devices, part of the DACPORT family. It integrates an on-chip buried Zener voltage reference, double-buffered latches, and a high-performance output amplifier. The device utilizes a BiMOS II process to combine low-power CMOS logic with precision bipolar linear circuitry. Key electrical specifications include ±1 LSB integral linearity, 15-bit monotonicity over temperature, and a settling time of 13 µs. It operates with analog supply voltages ranging from ±13.5 V to ±16.5 V and a digital supply of 5 V. The component is housed in a 24-pin SOIC package.

Feature Summary

• Complete 16-bit DAC functionality with on-chip 10.000 V buried Zener reference (±0.1% accuracy).
• Double-buffered latch architecture eliminates data skew and allows simultaneous multi-DAC updates.
• Flexible digital interface supporting serial (MSB/LSB first) or byte input modes with daisy-chain capability.
• Low glitch energy of 15 nV-s and total harmonic distortion plus noise (THD+N) of 0.009%.

Applications

• High-resolution industrial process control systems requiring precise voltage generation.
• Multi-channel data acquisition systems utilizing daisy-chain serial configurations.
• Precision test and measurement equipment demanding low distortion and high linearity.
• Programmable power supplies and waveform generators.

Procurement Notes

Verify the specific suffix for the reel variant, as standard datasheets often list the tube-packaged AD660BR. Confirm current production status, as older DACPORT models may be subject to obsolescence notices. Ensure the design supports the required ±13.5 V to ±16.5 V analog supply rails and 5 V digital logic levels. Check for RoHS compliance if environmental regulations apply to the final assembly.

Selection Notes

Select this component when 16-bit resolution and high accuracy are critical. The integrated reference simplifies design by removing external precision components. Consider the 24-pin SOIC package constraints for PCB layout. Verify that the SPI-compatible serial interface matches the host microcontroller's capabilities. Evaluate the need for double buffering if multiple outputs must update simultaneously to prevent transient errors.

Part Context

The AD660BR-REEL belongs to the Analog Devices DACPORT series, designed for applications requiring high precision and ease of integration. The 'BR' designation indicates the commercial temperature range (-40°C to +85°C) and SOIC package. The '-REEL' suffix specifies tape-and-reel packaging for automated surface-mount assembly. This model represents a mature technology leveraging BiMOS II processes for stability and performance.

Replacement Considerations

Direct pin-compatible replacements within the same family include the AD660ARZ or AD660BRZ for lead-free variants. For system upgrades, consider newer DACPORT models such as the AD7314 or AD7380, though interface and pinout differences may require schematic modifications. Verify that any substitute maintains the required 16-bit resolution and dual-supply operation.