LTC2635HUD-LMI8#TRPBF

Overview

The LTC2635HUD-LMI8#TRPBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in a 16-lead QFN package. It features an integrated precision reference with a full-scale output of 4.096V and operates on a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers and guarantees monotonicity over the automotive temperature range of –40°C to 125°C. Communication is handled via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Power-on reset options include zero-scale, mid-scale, or high-impedance states.

Feature Summary

• Quad 8-Bit Resolution with Integrated 4.096V Reference
• Automotive Temperature Range (–40°C to 125°C)
• Rail-to-Rail Output Buffers with Guaranteed Monotonicity
• I²C Interface with Selectable Power-On Reset States

Applications

• Process Control and Industrial Automation
• Power Supply Margining
• Portable Equipment

Procurement Notes

Verify the specific suffixes for this part number against official documentation to confirm the package type, temperature grade, and power-on reset configuration. Ensure compatibility with system voltage requirements, as the H-grade variant requires a minimum supply of 4.5V. Confirm that the I²C address pins are configured correctly for the target application bus topology.

Selection Notes

Select this component when a quad DAC solution with automotive qualification is required. The H-grade designation indicates a 4.096V full-scale output suitable for higher voltage applications compared to the L-grade's 2.5V output. Consider the 16-pin QFN package for space-constrained designs requiring exposed pad soldering for thermal management and grounding.

Part Context

This part belongs to the LTC2635 family of quad DACs, which also includes 10-bit and 12-bit resolution variants. The 'H' suffix denotes the automotive temperature grade and 4.096V internal reference, while 'UD' specifies the 16-pin QFN package. The '#TRPBF' suffix indicates tape and reel packaging with lead-free construction.

Replacement Considerations

Direct replacements within the same family include other LTC2635 variants with different resolutions (LTC2635HUZ10, LTC2635HMI12) or packages (MSOP). Verify pinout compatibility and electrical specifications such as supply voltage range and reference voltage before substitution.