LTC2666CUH-12#PBF

Overview

The LTC2666CUH-12#PBF is an octal, 12-bit digital-to-analog converter (DAC) featuring SoftSpan technology for independently programmable output ranges up to ±10V. It integrates a precision reference with a maximum temperature coefficient of 10ppm/°C and includes an 8:1 analog multiplexer. The device operates on a single 5V analog supply (VCC) and bipolar supplies ranging from ±4.5V to ±15.75V, or in single-supply mode with V– tied to ground. It utilizes a 3-wire SPI/Microwire-compatible serial interface compatible with logic levels as low as 1.71V.

Feature Summary

• Octal architecture with 12-bit resolution and guaranteed monotonicity over temperature
• SoftSpan capability allowing independent programming of five output ranges: 0V to 5V, 0V to 10V, ±2.5V, ±5V, and ±10V
• Integrated 2.5V precision reference with 10ppm/°C maximum temperature coefficient
• Built-in 8:1 analog multiplexer and A/B toggle register capability via software or dedicated pin

Applications

• Optical networking systems
• Precision instrumentation
• Data acquisition systems
• Automatic test equipment
• Process control and industrial automation

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm that the 'C' grade designation corresponds to the commercial operating temperature range of 0°C to 70°C. Ensure the QFN package thermal pad is properly soldered to the PCB for electrical connection to the V– supply.

Selection Notes

Select this model for applications requiring multiple channels with distinct voltage spans. The 12-bit resolution offers a balance between cost and performance compared to the 16-bit variant. Verify that the system power supplies can accommodate the required V+ and V– rails or single-supply configuration based on the desired output swing.

Part Context

This component belongs to the LTC2666 family of SoftSpan DACs. The CUH-12#PBF designation specifies the Commercial temperature grade, UH 32-lead QFN package, 12-bit resolution, and Lead-Free finish. Other variants include Industrial (I) and Automotive (H) grades with extended temperature ranges.

Replacement Considerations

Direct replacements within the same package and pinout include the LTC2666IUH-12#PBF for industrial temperatures and LTC2666HUH-12#PBF for automotive temperatures. For higher resolution requirements, the LTC2666-16 series is available but may require verification of settling time specifications.