LTC2635HUD-LMX8#TRPBF

Overview

The LTC2635HUD-LMX8#TRPBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features an integrated precision reference with a full-scale output of 4.096V and operates from a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 125°C automotive temperature range, and communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It incorporates a power-on reset circuit configured to reset outputs to mid-scale when using an external reference.

Feature Summary

• Quad 8-Bit DACs with Integrated Precision Reference
• 4.096V Full-Scale Output (LTC2635-H)
• I²C-Compatible Serial Interface (Standard/Fast Mode)
• Power-On Reset to Mid-Scale in External Reference Mode

Applications

• Process Control and Industrial Automation
• Power Supply Margining
• Automotive Systems

Procurement Notes

Verify that the specific suffix 'LMX' corresponds to the intended Power-On Reset behavior (Mid-Scale in External Reference Mode). Confirm the package type matches the design requirements, as the datasheet indicates this part family is available in both 16-pin QFN and 10-lead MSOP packages. Ensure the operating voltage range aligns with the 4.5V to 5.5V specification for the H-grade variant.

Selection Notes

Select the LTC2635H variant if a 4.096V full-scale output is required, noting the minimum supply voltage of 4.5V. Choose the LMX suffix specifically if the application demands the DAC outputs reset to mid-scale upon power-up when an external reference is utilized. For applications requiring zero-scale or high-impedance resets, alternative suffixes such as LZ or LMO must be selected.

Part Context

This component belongs to the LTC2635 family of quad DACs, which also includes 10-bit and 12-bit resolution variants. The 'H' designation indicates the 4.096V internal reference version, while 'UD' typically denotes the 16-pin QFN package. The '#TRPBF' suffix indicates a lead-free tape and reel packaging format.

Replacement Considerations

Direct replacements within the same family include LTC2635HUZ-LMX8#TRPBF (Zero-Scale Reset) or LTC2635HMI-LMX8#TRPBF (Mid-Scale Reset with Internal Reference). Cross-resolution equivalents like LTC2635HUZ-LMX10#TRPBF are pin-compatible but offer different linearity specifications.