LTC2751IUHF-14#PBF

Overview

The LTC2751IUHF-14#PBF is a 14-bit multiplying digital-to-analog converter with parallel input and current output. It operates from a single 2.7V to 5.5V supply and guarantees monotonicity over the industrial temperature range of -40°C to 85°C. The device features SoftSpan technology, allowing six programmable output ranges (two unipolar, four bipolar) via a bidirectional parallel interface that supports register readback. Key electrical specifications include a maximum integral nonlinearity (INL) of ±1 LSB, a settling time of 2µs to ±1 LSB, and a low supply current of 1µA maximum.

Feature Summary

• 14-bit resolution with guaranteed monotonicity over temperature
• Six programmable output ranges: 0V to 5V, 0V to 10V, ±2.5V, ±5V, ±10V, and –2.5V to 7.5V
• 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
• Process control and industrial automation systems
• Automatic test equipment
• Data acquisition systems

Procurement Notes

Verify the specific suffix IUHF indicates the industrial temperature grade (-40°C to 85°C) and the QFN package type. Confirm the #PBF designation ensures lead-free compliance. Cross-reference the manufacturer's latest ordering guide for availability status and packaging quantities, as distribution channels may vary.

Selection Notes

Select this model when a 14-bit resolution is sufficient for the application, offering a balance between performance and pin count compared to the 16-bit variant. Ensure the external reference voltage matches the desired output span scaling. Verify that the system bus can support the required parallel data width and timing constraints for write and update operations.

Part Context

This component belongs to the LTC2751 family, which includes 12-bit, 14-bit, and 16-bit variants. The 14-bit version shares the same 38-lead 5mm × 7mm QFN package and functional architecture as its counterparts but utilizes fewer data pins (D0-D13) while maintaining identical span control and peripheral pin configurations.

Replacement Considerations

Direct replacements within the same family include the LTC2751CUHF-14#PBF for commercial temperature range applications or the LTC2751AIUHF-14#PBF if higher accuracy specifications are required. Ensure the substitute part maintains the same package outline and pinout compatibility.