LTC2635CUD-LZ8#TRPBF

Overview

The LTC2635CUD-LZ8#TRPBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) featuring an integrated precision reference. It operates from a single 2.7V to 5.5V supply and provides a full-scale output of 2.5V. The device includes rail-to-rail output buffers, double-buffered data latches, 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 zero-scale in internal reference mode.

Feature Summary

• Quad 8-Bit Resolution with Integrated Precision Reference
• Rail-to-Rail Output Buffers Guaranteed Monotonic Over –40°C to 125°C
• I²C Interface with Standard and Fast Mode Support
• Power-On Reset to Zero-Scale

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates lead-free tape and reel packaging containing 2,500 pieces. Confirm the UD package designation corresponds to the 16-pin 3mm × 3mm QFN form factor. Ensure the LZ8 variant matches the required zero-scale power-on reset configuration for the application design.

Selection Notes

Select this component when four independent 8-bit DAC channels are required within a compact footprint. The integrated 2.5V full-scale reference simplifies design by eliminating external components. Verify that the 2.7V to 5.5V supply range aligns with system power constraints and that the I²C bus speed requirements fit within the 100kHz or 400kHz operational limits.

Part Context

This part belongs to the LTC2635 family of quad DACs available in 12-, 10-, and 8-bit resolutions. The 'L' suffix denotes the 2.5V full-scale internal reference option, while 'H' variants offer 4.096V. The 'C' grade specifies commercial temperature operation (0°C to 70°C), whereas 'H' grade covers automotive ranges (-40°C to 125°C).

Replacement Considerations

Direct substitutes include other LTC2635 variants with different resolutions (LTC2635-10, LTC2635-12) or reset configurations (LMI, LMX, LMO). Package alternatives exist in the 10-lead MSOP format (MSE suffix). Cross-model compatibility requires verifying pinout alignment and I²C address settings.