LTC2751BIUHF-16#PBF

Overview

The LTC2751BIUHF-16#PBF is a 16-bit, single-channel multiplying digital-to-analog converter (DAC) with parallel input and current output. It operates from 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 and achieves a maximum integral nonlinearity (INL) of ±1 LSB. Key electrical specifications include a settling time of 2µs to ±1 LSB, a maximum supply current of 1µA, and a glitch impulse of 1nV·s. It utilizes a bidirectional parallel interface allowing readback of all internal registers.

Feature Summary

• SoftSpan Technology: Six software-programmable output ranges including unipolar (0V to 5V, 0V to 10V) and bipolar (±2.5V, ±5V, ±10V, –2.5V to 7.5V).
• High Precision: Guaranteed monotonicity over temperature with ±1 LSB INL and DNL performance across the operating range.
• Low Power Consumption: Maximum supply current of 1µA at VDD = 5V.
• Bidirectional Parallel Interface: Supports write operations and readback of data and span registers via D0-D15 and S0-S2 pins.

Applications

• Process Control and Industrial Automation
• Automatic Test Equipment
• Data Acquisition Systems

Procurement Notes

Verify the ordering suffix #PBF indicates a lead-free finish and RoHS compliance. Confirm the 'I' grade designation corresponds to the industrial temperature range of –40°C to +85°C. Ensure the UHF package type matches the required 38-lead QFN footprint on the target PCB layout.

Selection Notes

Select this component when a high-resolution, low-power DAC with flexible voltage output ranges is required without external range switching hardware. The bidirectional I/O allows for system verification through register readback. Ensure the external reference voltage is within the ±15V limit for the REF and RIN pins to maintain proper operation across all SoftSpan configurations.

Part Context

This part belongs to the LTC2751 family of SoftSpan DACs, which includes 12-bit, 14-bit, and 16-bit variants. The BIUHF-16 designation specifies the B-grade accuracy level, industrial temperature range, UHF QFN package, and 16-bit resolution. Other family members share the same pinout and interface but differ in resolution and linearity specifications.

Replacement Considerations

Direct replacements within the same package and functionality include LTC2751BCUHF-16#PBF (commercial grade) or LTC2751ACUHF-16#PBF (higher accuracy A-grade). For different resolutions, consider LTC2751IUHF-14#PBF or LTC2751IUHF-12#PBF, noting that pin assignments for data bits may vary slightly between resolutions.