LTC2635HUD-LMX10#TRPBF

Overview

The LTC2635HUD-LMX10#TRPBF is a quad 10-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 ranging from 2.7V to 5.5V and utilizes a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity error of ±1 LSB, low noise of 0.75mV peak-to-peak in the 0.1Hz to 200kHz bandwidth, and guaranteed monotonicity over the automotive temperature range of –40°C to 125°C.

Feature Summary

• Quad 10-bit DACs with rail-to-rail output buffers
• Integrated 2.5V precision reference (10ppm/°C drift)
• I²C interface with selectable internal or external reference mode
• Power-on reset configured for mid-scale output in external reference mode

Applications

• Mobile communications systems
• Process control and industrial automation
• Power supply margining
• Portable equipment
• Automotive applications

Procurement Notes

Verify that the H suffix confirms the automotive temperature grade (–40°C to 125°C) and the L suffix specifies the 2.5V full-scale internal reference. Confirm the MX power-on reset option aligns with system requirements for mid-scale initialization when using the internal reference. Ensure the TRPBF suffix indicates tape and reel packaging with lead-free construction.

Selection Notes

Select this part for designs requiring four independent analog outputs controlled via I²C. The 10-bit resolution offers a balance between cost and performance, with ±1 LSB INL accuracy. The automotive grade ensures reliability in harsh environments. Consider the external reference capability if a different full-scale voltage is needed, though the internal 2.5V reference is fixed for the L variant.

Part Context

This component belongs to the LTC2635 family, which includes 8-bit, 10-bit, and 12-bit variants. The specific model HUD-LMX10 denotes the 10-bit resolution, QFN package, automotive temperature range, and mid-scale reset in external reference mode. Other family members share similar pinouts and interfaces but differ in resolution, reset behavior, and supply voltage ranges.

Replacement Considerations

Direct replacements within the same family include LTC2635UD-LMX10#TRPBF (commercial grade) or LTC2635HMI10#TRPBF (mid-scale reset in internal reference mode). Verify that any substitute matches the required temperature range and power-on reset state to ensure system compatibility.