LTC2666IUH-12#TRPBF

Overview

The LTC2666IUH-12#TRPBF is an octal, 12-bit digital-to-analog converter (DAC) featuring SoftSpan technology and a precision integrated reference. It provides eight independent voltage outputs with ranges up to ±10V, including 0V to 5V, 0V to 10V, ±2.5V, ±5V, and ±10V. The device guarantees monotonicity over temperature and includes rail-to-rail output buffers capable of driving ±10mA. Key specifications include a maximum integral nonlinearity (INL) error of ±0.2 LSB, a settling time of 15.5µs for the ±10V range, and a 3-wire SPI/Microwire-compatible serial interface operating at clock rates up to 50MHz.

Feature Summary

• Octal 12-Bit Resolution: Eight independent channels with full-scale accuracy across all programmable ranges.
• SoftSpan Technology: Independently programmable output ranges (0V to 5V, 0V to 10V, ±2.5V, ±5V, ±10V) per channel.
• Integrated Precision Reference: Built-in 2.5V reference with a maximum temperature coefficient of 10ppm/°C.
• A/B Toggle Capability: Hardware or software-controlled switching between two sets of DAC registers.

Applications

• Optical Networking
• Instrumentation
• Data Acquisition Systems
• Automatic Test Equipment
• Process Control and Industrial Automation

Procurement Notes

Verify that the #TR suffix indicates a tape and reel packaging format containing 2500 pieces, distinct from the tube-packaged #PBF variant. Confirm the 'I' suffix corresponds to the industrial temperature range of –40°C to 85°C. Ensure the ordering information matches the specific 12-bit resolution required for the application design.

Selection Notes

Select this component when eight independent analog outputs are required in a single package. The 12-bit resolution offers a balance between cost and performance compared to the 16-bit version. Verify that the supply voltages (V+ and V–) align with the desired output swing, noting that the negative supply can be tied to ground for single-supply operation.

Part Context

This part belongs to the LTC2666 family of SoftSpan DACs. The 'UH' designation identifies the 32-lead (5mm × 5mm) QFN package. The 'I' grade specifies the industrial temperature range, while the '12' indicates 12-bit resolution. The '#TRPBF' suffix confirms lead-free construction and tape-and-reel shipping.

Replacement Considerations

The LTC2666HUH-12#TRPBF serves as a direct replacement for higher temperature requirements, supporting an extended range of –40°C to 125°C. Other family members like the LTC2666CUH-12#TRPBF offer commercial temperature grades but share identical electrical characteristics within their respective operating limits.