LTC2666CUH-16#PBF

Overview

The LTC2666CUH-16#PBF is an octal, 16-bit digital-to-analog converter (DAC) featuring SoftSpan technology and an integrated precision reference. It provides eight independent voltage outputs with a maximum integral nonlinearity of ±4 LSB. The device supports five output ranges: 0V to 5V, 0V to 10V, ±2.5V, ±5V, and ±10V. Each channel includes a rail-to-rail output buffer capable of driving ±10mA. The component utilizes a 3-wire SPI/Microwire-compatible serial interface operating at clock rates up to 50MHz. It incorporates A/B toggle capability, an 8:1 analog multiplexer, and operates within a commercial temperature range of 0°C to 70°C in a 32-lead QFN package.

Feature Summary

• Octal 16-bit resolution with independently programmable SoftSpan output ranges up to ±10V
• Integrated 2.5V precision reference with a maximum temperature coefficient of 10ppm/°C
• Built-in rail-to-rail output buffers driving ±10mA load current
• A/B toggle functionality via dedicated pin or software command

Applications

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

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm lead-free status and packaging format. The #PBF designation indicates a lead-free finish. Confirm that the CUH suffix corresponds to the commercial temperature grade (0°C to 70°C) and the UH package type (32-Lead QFN). Ensure compatibility with system supply voltages and logic levels before procurement.

Selection Notes

Select this component for applications requiring multiple high-resolution channels with flexible output voltage ranges. The integrated reference simplifies design by eliminating external precision references. Consider the 50MHz serial interface speed for high-throughput data acquisition. Verify that the ±10mA drive capability meets load requirements without additional buffering. Evaluate the need for the internal analog multiplexer if monitoring multiple channels is required.

Part Context

This part belongs to the LTC2666 family of SoftSpan DACs. Variants exist with different resolutions (12-bit), temperature grades (Industrial -40°C to 85°C, Automotive -40°C to 125°C), and package options. The CUH-16#PBF specifically denotes the 16-bit resolution, commercial temperature range, and tube packaging. Other family members include the LTC2662, LTC2664, and LTC2665 with varying channel counts.

Replacement Considerations

Direct replacements within the same family include the LTC2666IUH-16#PBF for industrial temperature operation (-40°C to 85°C) and the LTC2666HUH-16#PBF for automotive temperature operation (-40°C to 125°C). These parts share identical pinouts and electrical characteristics but differ in guaranteed operating temperature ranges.