LTC2666CUH-12#TRPBF

Overview

The LTC2666CUH-12#TRPBF 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 2.5V reference with a maximum temperature coefficient of 10ppm/°C and includes an 8:1 analog multiplexer. The device operates on a single 4.5V to 5.5V analog supply (VCC) and supports bipolar supplies from ±4.5V to ±15.75V, or ground-referenced V– for single-supply applications. It utilizes a 3-wire SPI/Microwire-compatible interface operating at clock rates up to 50MHz with logic levels as low as 1.71V. Packaged in a 32-lead 5mm × 5mm QFN, this component is specified for the commercial temperature range of 0°C to 70°C.

Feature Summary

• Octal 12-bit resolution with independently programmable SoftSpan output ranges: 0V to 5V, 0V to 10V, ±2.5V, ±5V, and ±10V.
• Integrated precision 2.5V reference with 10ppm/°C max temperature coefficient; supports external reference input.
• Built-in 8:1 analog multiplexer and A/B toggle capability via dedicated pin or software command.
• Rail-to-rail output buffers driving ±10mA with guaranteed monotonicity over temperature.

Applications

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

Procurement Notes

Verify that the #TRPBF suffix indicates a tape and reel quantity of 2500 pieces. Confirm the 'C' grade designation corresponds to the commercial operating temperature range of 0°C to 70°C. Ensure the order matches the specific 12-bit resolution variant rather than the 16-bit version.

Selection Notes

Select this model when eight independent channels are required with flexible voltage ranges. The 12-bit resolution offers a balance between performance and cost compared to the 16-bit variant. Verify that the application requires the commercial temperature grade (0°C to 70°C); use the 'I' or 'H' suffixes if industrial (-40°C to 85°C) or extended (-40°C to 125°C) temperatures are needed.

Part Context

This part belongs to the LTC2666 family of SoftSpan DACs. The 'UH' suffix denotes the 32-lead QFN package. The '12' indicates 12-bit resolution, distinguishing it from the 16-bit models. The 'TRPBF' suffix specifies the tape and reel packaging format and lead-free finish.

Replacement Considerations

Direct functional replacements within the same package and specification include other LTC2666 variants such as LTC2666IUH-12#TRPBF (Industrial temp) or LTC2666HUH-12#TRPBF (High temp). For fewer channels, consider the LTC2664 family.