LTC2751ACUHF-16#PBF

Overview

The LTC2751ACUHF-16#PBF is a 16-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 temperature. The device features SoftSpan technology, allowing six programmable output ranges (two unipolar, four bipolar) via the parallel interface or pin strapping. Key electrical specifications include a maximum integral nonlinearity (INL) of ±1 LSB and differential nonlinearity (DNL) of ±1 LSB across the full operating range. It achieves a settling time of 2µs to ±1 LSB with a low glitch impulse of 1nV·s. The part includes an asynchronous clear pin, power-on reset to 0V, and bidirectional I/O for register readback.

Feature Summary

• Six programmable output ranges: Unipolar (0V to 5V, 0V to 10V) and Bipolar (±5V, ±10V, ±2.5V, -2.5V to 7.5V)
• Maximum INL error of ±1 LSB and DNL of ±1 LSB over temperature without adjustments
• Bidirectional parallel interface with readback capability for all internal registers
• Low supply current of 1µA maximum and glitch impulse of 1nV·s

Applications

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

Procurement Notes

Verify the ordering suffix 'CUHF' corresponds to the commercial temperature range (0°C to 70°C) as specified in the manufacturer's order information table. Confirm that the package type is the 38-lead 5mm × 7mm plastic QFN. Ensure the '#PBF' designation indicates lead-free finish compliance. Cross-reference the specific lot marking code against the datasheet to confirm the grade and revision.

Selection Notes

Select this component when a 16-bit resolution with software-selectable voltage spans is required. The AC grade ensures ±1 LSB INL/DNL performance over the commercial temperature range. Consider the bidirectional parallel interface if system bus architecture supports it. For applications requiring wider temperature ranges, the AIUHF variant (-40°C to 85°C) should be selected instead. Ensure external op-amp selection aligns with the precision requirements outlined in the application information section.

Part Context

This part belongs to the LTC2751 family of SoftSpan DACs, which also includes 12-bit and 14-bit variants. The ACUHF-16#PBF specifically denotes the 16-bit resolution version in the commercial temperature grade. It shares the same 38-pin QFN footprint and pinout configuration as other members of the series, facilitating design flexibility within the same package constraint.

Replacement Considerations

Direct replacements within the same package and specification include the LTC2751AIUHF-16#PBF for industrial temperature range operation. Other family members like the LTC2751BCUHF-16#PBF offer different accuracy grades but maintain the same interface and pinout.