LTC2751IUHF-14#TRPBF

Overview

The LTC2751IUHF-14#TRPBF is a 14-bit, multiplying, current-output digital-to-analog converter (DAC) from Analog Devices. It operates on a single 2.7V to 5.5V supply with a maximum supply current of 1µA. The device features SoftSpan technology, allowing six programmable output ranges via parallel interface or pin strapping: two unipolar (0V to 5V, 0V to 10V) and four bipolar (±2.5V, ±5V, ±10V, –2.5V to 7.5V). Key electrical characteristics include a settling time of 2µs to ±1 LSB, a glitch impulse of 1nV•s, and guaranteed monotonicity over temperature. It utilizes a bidirectional parallel I/O interface for register readback.

Feature Summary

• 14-bit resolution with ±1 LSB INL and DNL guarantees over temperature
• Six software-programmable output ranges using SoftSpan architecture
• Bidirectional parallel interface with full register readback capability
• Asynchronous CLR pin resets DAC output to 0V in any range

Applications

• High-resolution offset and gain adjustment systems
• Process control and industrial automation equipment
• Automatic test equipment (ATE)
• Data acquisition systems

Procurement Notes

Verify the ordering suffix #TRPBF indicates tape and reel packaging when sourcing this component. Confirm the 'I' grade designation corresponds to the industrial temperature range of –40°C to +85°C. Ensure compatibility with the 38-lead QFN package dimensions during procurement planning.

Selection Notes

Select the LTC2751IUHF-14#TRPBF for applications requiring 14-bit precision with low power consumption under 1µA. Choose this model over the 16-bit variant if cost or specific performance thresholds allow, noting that the 14-bit version shares the same package and interface. Ensure external op-amp selection aligns with the required accuracy for the chosen output range.

Part Context

This part belongs to the LTC2751 family of SoftSpan DACs, which includes 12-bit, 14-bit, and 16-bit variants. The IUHF-14 suffix specifies the 14-bit resolution, industrial temperature grade, QFN package, and tape-and-reel shipping format. It shares the same physical footprint and pinout as other members of the series, facilitating design flexibility across resolution requirements.

Replacement Considerations

Direct replacements within the same family include LTC2751CUHF-14#TRPBF for commercial temperature range or LTC2751AIUHF-14#TRPBF if higher linearity specifications are required. Verify that any substitute maintains the 38-lead QFN package and parallel interface compatibility.