LTC2751BCUHF-16#TRPBF

Overview

The LTC2751BCUHF-16#TRPBF is a 16-bit, multiplying, current-output digital-to-analog converter (DAC) from Analog Devices. It operates on a single 2.7V to 5.5V supply and features SoftSpan technology for six programmable output ranges: two unipolar (0V to 5V, 0V to 10V) and four bipolar (±2.5V, ±5V, ±10V, -2.5V to 7.5V). The device guarantees monotonicity over temperature with a maximum integral nonlinearity (INL) of ±1 LSB and differential nonlinearity (DNL) of ±1 LSB. Key electrical characteristics include a 2µs settling time to ±1 LSB, a low glitch impulse of 1nV·s, and a maximum supply current of 1µA. It utilizes a bidirectional parallel interface with full register readback capabilities.

Feature Summary

• 16-bit resolution with ±1 LSB INL and DNL guaranteed over the operating temperature range
• SoftSpan architecture providing six software-programmable output ranges via parallel interface
• Bidirectional parallel I/O interface allowing readback of all internal registers
• Asynchronous CLR pin resets DAC output to 0V in any selected output range

Applications

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

Procurement Notes

Verify that the component matches the specific package type and temperature grade required for the design. Confirm that the tape and reel specifications align with automated assembly requirements. Ensure the ordering suffix corresponds to the intended commercial or industrial temperature range as defined by the manufacturer's documentation.

Selection Notes

Select this part when a 16-bit current-output DAC with software-selectable voltage ranges is required. The LTC2751B-16 variant offers ±4 LSB gain error, which is suitable for applications where the tighter ±0.5 LSB specification of the LTC2751A-16 is not necessary. Ensure the external reference amplifier can handle the ±15V input limits on the REF and RIN pins.

Part Context

This component belongs to the LTC2751 family of SoftSpan DACs, which includes 12-bit, 14-bit, and 16-bit variants. The 'B' suffix indicates a specific accuracy grade within the 16-bit lineup, distinguished from the 'A' grade by its gain error specifications. The 'CUHF' designation specifies the commercial temperature range and the 38-lead QFN package format.

Replacement Considerations

Direct replacements within the same family include the LTC2751ACUHF-16#TRPBF for higher precision or the LTC2751IUHF-16#TRPBF for industrial temperature operation. Cross-family substitutes like the LTC2754 series offer serial interfaces instead of parallel, requiring significant schematic and firmware changes.