LTC2635HUD-LMI8#PBF

Overview

The LTC2635HUD-LMI8#PBF 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 2.5V and a temperature coefficient of 10ppm/°C. The device operates on a single supply voltage ranging from 4.5V to 5.5V. It 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.

Feature Summary

• Quad 8-Bit Resolution with Integrated 2.5V Reference
• Automotive Temperature Range (–40°C to 125°C)
• Rail-to-Rail Output Buffers with Guaranteed Monotonicity
• Power-On Reset to Mid-Scale in Internal Reference Mode

Applications

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

Procurement Notes

Verify the specific suffix LMI indicates power-on reset to mid-scale in internal reference mode. Confirm the H grade corresponds to the 4.5V to 5.5V supply range and automotive temperature rating. Ensure the PBF designation confirms lead-free compliance for procurement specifications.

Selection Notes

Select this part for applications requiring four independent 8-bit outputs with low drift. The H-grade variant is necessary for environments exceeding 70°C or requiring operation above 4.5V. The LMI suffix ensures outputs initialize to mid-scale upon power-up, which may be required for specific system safety states compared to zero-scale options.

Part Context

This component belongs to the LTC2635 family of quad DACs available in 12-, 10-, and 8-bit resolutions. The HUD package denotes a 16-lead 3mm × 3mm QFN form factor. The LMI ordering suffix specifically configures the internal power-on reset circuit to drive all DAC outputs to mid-scale when using the internal reference.

Replacement Considerations

Direct replacements within the same family include LTC2635HMX8#PBF (external reference reset) or LTC2635HZ8#PBF (zero-scale reset). For different resolutions, consider LTC2635HMI10#PBF or LTC2635HMI12#PBF.