LTC2635CUD-LMO8#PBF

Overview

The LTC2635CUD-LMO8#PBF 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. The part incorporates a power-on reset circuit that defaults 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
• Power Supply Margining
• Portable Equipment

Procurement Notes

Verify the specific LMO suffix configuration, which ensures DAC outputs enter a high-impedance state after power-up while resetting to mid-scale internally. Confirm the C grade designation for the commercial temperature range (0°C to 70°C). Ensure the UD package type matches the 16-pin QFN footprint requirements for the target PCB layout.

Selection Notes

Select this component when a quad-channel DAC with low pin count is required. The LMO variant is distinct from LZ (zero-scale) or MI/MX (mid-scale) options due to its high-impedance power-on behavior. Verify that the 2.5V internal full-scale range meets system requirements; otherwise, consider the H-grade version for 4.096V or external reference configurations.

Part Context

This part belongs to the LTC2635 family of quad DACs available in 8-, 10-, and 12-bit resolutions. The 'UD' suffix indicates the 16-pin 3mm × 3mm QFN package. The '#PBF' suffix denotes a lead-free design compliant with RoHS standards. The device shares core architecture with other variants but differs in resolution, reset behavior, and operating voltage ranges.

Replacement Considerations

Direct substitutes within the same family include LTC2635CUD-LZ8#PBF (reset to zero-scale) or LTC2635CUD-MI8#PBF (reset to mid-scale). Cross-vendor replacements require matching quad-channel I²C DAC specifications, 8-bit resolution, and compatible supply voltage ranges.