LTC2751AIUHF-16#PBF

Overview

The LTC2751AIUHF-16#PBF is a 16-bit multiplying digital-to-analog converter (DAC) from Analog Devices, housed in a 38-lead 5mm × 7mm 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 programmable output ranges: two unipolar (0V to 5V, 0V to 10V) and four bipolar (±2.5V, ±5V, ±10V, –2.5V to 7.5V). Key electrical specifications include a settling time of 2µs to ±1LSB, a glitch impulse of 1nV•s, and guaranteed monotonicity over the industrial temperature range of –40°C to +85°C.

Feature Summary

• Six programmable output ranges via SoftSpan technology or manual pin strapping
• Bidirectional parallel interface with full register readback capability
• Maximum integral nonlinearity (INL) error of ±1 LSB over temperature
• Asynchronous CLR pin resets DAC output to 0V in any range

Applications

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

Procurement Notes

Verify that the ordering suffix #PBF indicates a lead-free finish and tube packaging. Confirm the 'I' grade designation corresponds to the required –40°C to +85°C operating temperature range for your specific application environment.

Selection Notes

Select this component when 16-bit accuracy and low power consumption are critical. Ensure the external reference voltage matches the desired output span scaling. Verify that the system can accommodate the 38-pin QFN footprint and that the parallel bus timing meets the specified setup and hold requirements.

Part Context

This part belongs to the LTC2751 family of SoftSpan DACs, which includes 12-bit and 14-bit variants. The AIUHF-16 designation specifically denotes the highest precision grade (Class A) within the 16-bit subset, offering tighter linearity specifications compared to the BIUHF-16 variant while maintaining the same physical package and interface.

Replacement Considerations

The LTC2751BIUHF-16#PBF serves as a lower-cost alternative with slightly relaxed linearity specifications (±2 LSB INL). For applications requiring higher channel counts, consider the LTC2754 series.