LTC2635CUD-LMO8#TRPBF

Overview

The LTC2635CUD-LMO8#TRPBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. 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 2.7V to 5.5V. It includes rail-to-rail output buffers and is guaranteed monotonic over the commercial temperature range of 0°C to 70°C. Communication is handled via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. A key feature is the power-on reset configuration that sets outputs to a high-impedance state upon initialization.

Feature Summary

• Quad 8-Bit Resolution with Integrated 2.5V Reference
• Power-On Reset to High-Impedance State (LMO Option)
• I²C Interface with Standard and Fast Mode Support
• Rail-to-Rail Output Buffers Guaranteed Monotonic

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Portable Equipment

Procurement Notes

Verify the specific LMO suffix requirement for high-impedance power-on reset behavior, as this differs from standard zero or mid-scale reset options. Confirm the C-grade commercial temperature rating aligns with system thermal constraints. Ensure the QFN package soldering requirements for the exposed ground pad are met during assembly.

Selection Notes

Select this part when four independent 8-bit DAC channels are required in a compact footprint. The LMO variant is suitable for applications where floating outputs are preferred at startup. For higher resolution needs, consider the -10 or -12 bit variants within the same family. Verify supply voltage compatibility with the 2.7V to 5.5V operating range.

Part Context

This component belongs to the LTC2635 family of quad DACs, which also includes 10-bit and 12-bit resolutions. The 'C' indicates the commercial temperature grade, while 'UD' specifies the 16-pin QFN package. The '#TRPBF' suffix denotes lead-free tape and reel packaging. Other variants include H-grade automotive parts and different reset configurations like LZ (zero-scale) and LMI (mid-scale).

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2635CUD-LZ8#TRPBF (Zero-Scale Reset) and LTC2635CUD-LMI8#TRPBF (Mid-Scale Reset). Cross-family replacements require verification of pinout and register compatibility.