LTC2753IUK-12#TRPBF

Overview

The LTC2753IUK-12#TRPBF is a dual 12-bit multiplying digital-to-analog converter (DAC) with parallel I/O. 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 includes a power-on reset circuit that sets outputs to 0V upon initial power application. An asynchronous CLR pin allows clearing the DACs to 0V in any range. It utilizes a bidirectional parallel interface supporting readback of all on-chip registers.

Feature Summary

• Dual 12-bit current-output DACs with parallel input/output interface
• SoftSpan architecture providing six software-programmable voltage ranges
• Low supply current of 1μA maximum at VDD = 5V
• Guaranteed monotonic operation over the full operating temperature range
• Asynchronous clear pin and power-on reset to 0V

Applications

• Process control systems
• Industrial automation equipment
• Automatic test equipment
• Data acquisition systems

Procurement Notes

Verify the ordering suffix #TRPBF indicates tape and reel packaging. Confirm the 'I' grade designation corresponds to the industrial temperature range of –40°C to 85°C. Ensure the specific part number matches the 12-bit resolution variant rather than the 14-bit or 16-bit versions within the family.

Selection Notes

Select this component when dual-channel current-output conversion with high precision is required. The 12-bit resolution offers a balance between performance and cost. Consider the SoftSpan feature if system design requires flexible voltage range programming without hardware changes. Verify that the parallel interface timing requirements align with the host microprocessor or FPGA capabilities.

Part Context

This part belongs to the LTC2753 family of SoftSpan DACs, which also includes 14-bit and 16-bit variants. The 'I' suffix denotes the industrial temperature grade, while 'C' denotes commercial grade. The 'UK' package identifier refers to the 48-lead 7mm × 7mm plastic QFN form factor. Other family members include LTC2753CUK-12, LTC2753IUK-14, and LTC2753AIUK-16.

Replacement Considerations

Direct replacements within the same package and pinout include other LTC2753 variants such as LTC2753IUK-14#TRPBF or LTC2753IUK-16#TRPBF, noting the difference in resolution. Cross-family replacements like the LTC2754 (quad channel) require schematic redesign due to pinout differences.