LTC2751IUHF-12#TRPBF

Overview

The LTC2751IUHF-12#TRPBF is a 12-bit multiplying digital-to-analog converter (DAC) from Analog Devices, housed in a 38-lead 5mm × 7mm plastic QFN package. It operates on a single 2.7V to 5.5V supply with a maximum supply current of 1µA. The device features a bidirectional parallel interface allowing readback of all internal registers and offers six software-programmable output ranges via SoftSpan technology. Key electrical specifications include a settling time of 2µs to ±1 LSB, a glitch impulse of 1nV·s, and guaranteed monotonicity over the industrial temperature range of -40°C to +85°C.

Feature Summary

• SoftSpan Technology: Six programmable output ranges including unipolar (0V to 5V, 0V to 10V) and bipolar (±2.5V, ±5V, ±10V, -2.5V to 7.5V).
• Bidirectional Parallel Interface: Supports readback of data and span registers for verification.
• Asynchronous Clear: CLR pin resets DAC output to 0V in any selected range.
• Low Power Consumption: Maximum supply current of 1µA at VDD = 5V.

Applications

• High resolution offset and gain adjustment systems.
• Process control and industrial automation equipment.
• Automatic test equipment (ATE).
• Data acquisition systems requiring precise voltage scaling.

Procurement Notes

Verify the ordering suffix #TRPBF confirms tape and reel packaging suitable for automated surface-mount assembly. Confirm the 'I' grade designation matches the required -40°C to +85°C industrial operating temperature range. Ensure the 38-lead QFN footprint aligns with the PCB layout guidelines provided in the datasheet, specifically regarding the exposed ground pad soldering requirements.

Selection Notes

Select this model for applications requiring 12-bit resolution with software-selectable output spans. The LTC2751-12 variant provides ±1 LSB INL/DNL guarantees. Consider the bidirectional I/O capability if system diagnostics or register verification are necessary. For higher precision needs, evaluate the LTC2751-16 variants which offer tighter linearity specifications across the full temperature range.

Part Context

This component belongs to the LTC2751 family of SoftSpan DACs, which includes 12-, 14-, and 16-bit resolutions. The IUHF-12#TRPBF variant specifically denotes the 12-bit resolution, industrial temperature grade, QFN package, and tape-and-reel shipping format. It shares the same pinout and core architecture as other members of the series, differing primarily in bit depth and performance tolerances.

Replacement Considerations

Direct replacements within the same family include LTC2751IUHF-14#TRPBF and LTC2751AIUHF-16#TRPBF for higher resolution needs. Cross-family alternatives should be evaluated based on interface compatibility and power consumption constraints.