LTC2635CUD-LMI8#PBF

Overview

The LTC2635CUD-LMI8#PBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in a 16-lead 3mm × 3mm QFN package. It features an integrated precision reference with a full-scale output of 2.5V and operates on a single 2.7V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 125°C range, and communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Power-on reset defaults to mid-scale in internal reference mode.

Feature Summary

• Quad 8-Bit DACs with Integrated Precision Reference
• Rail-to-Rail Output Buffers and Guaranteed Monotonicity
• I²C Interface with Standard and Fast Mode Support
• Power-On Reset to Mid-Scale

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Power Supply Margining
• Portable Equipment
• Automotive

Procurement Notes

Verify the #PBF suffix indicates lead-free construction and the UD suffix confirms the 16-pin QFN package. Confirm the LMI8 designation specifies the 2.5V full-scale output, 8-bit resolution, and mid-scale power-on reset behavior. Ensure the C grade meets commercial temperature requirements if automotive range is not needed.

Selection Notes

Select this part for applications requiring four independent 8-bit outputs with low crosstalk and high accuracy. The integrated 2.5V reference simplifies design by eliminating external components. Consider the H-grade variants if a 4.096V full-scale output or extended –40°C to 125°C operating temperature is required.

Part Context

This component belongs to the LTC2635 family of quad DACs, which also offers 10-bit and 12-bit resolutions. The family shares common interfaces and packaging options but varies in linearity error specifications and full-scale voltage ranges based on the internal reference configuration.

Replacement Considerations

Publicly confirmed substitutes include other LTC2635 variants such as LTC2635-LZ8 for zero-scale reset or LTC2635-HMI8 for higher voltage operation. Cross-family replacements require verification of pin compatibility and electrical parameter alignment.