LTC2655IUF-L12#PBF

Overview

The LTC2655IUF-L12#PBF is a quad 12-bit rail-to-rail digital-to-analog converter (DAC) from Analog Devices, housed in a 20-lead 4mm × 4mm plastic QFN package. It features an integrated reference providing a 2.5V full-scale output and operates on a single 2.7V to 5.5V supply. The device utilizes a 2-wire I²C compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include ±1 LSB maximum integral nonlinearity (INL), ±0.1 LSB differential nonlinearity (DNL), and a settling time of 3.9µs for 12-bit accuracy. It guarantees monotonicity over the industrial temperature range of –40°C to 85°C.

Feature Summary

• Quad 12-bit resolution with rail-to-rail output buffers
• Integrated 1.25V reference yielding 2.5V full-scale output
• ±1 LSB maximum INL and ±0.1 LSB DNL
• Guaranteed monotonic operation over temperature

Applications

• Mobile communications
• Process control and industrial automation
• Instrumentation
• Automatic test equipment
• Automotive systems

Procurement Notes

Verify the specific ordering suffix '#PBF' confirms lead-free construction and tube packaging. Confirm the 'I' grade matches the required –40°C to 85°C operating range. Ensure the 'L' suffix corresponds to the 2.5V internal reference configuration. Cross-reference the UF package code with the 20-lead QFN footprint requirements.

Selection Notes

Select this part when four independent 12-bit voltage outputs are required within a compact QFN footprint. The integrated 2.5V reference simplifies design by eliminating external components. Choose the 'I' grade for industrial environments requiring –40°C to 85°C stability. Consider the 'H' variant if a 4.096V full-scale range is needed with a higher minimum supply voltage.

Part Context

This component belongs to the LTC2655 family of quad DACs. Variants differ by resolution (12-bit vs 16-bit), temperature grade (C vs I), and internal reference voltage (L for 2.5V vs H for 4.096V). The IUF-L12 designation specifically identifies the industrial grade, 12-bit resolution, and low-voltage reference version in the QFN package.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.