LTC2635HUD-LMX8#PBF

Overview

The LTC2635HUD-LMX8#PBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc., housed in a 16-lead QFN package. It features an integrated precision reference with a full-scale output of 2.5V and operates on a single 2.7V to 5.5V supply. The device 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 Precision Reference
• Automotive Temperature Grade (–40°C to 125°C)
• Power-On Reset to Mid-Scale in External Reference Mode
• Low Noise: 0.75mV P-P (0.1Hz to 200kHz)

Applications

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

Procurement Notes

Verify the specific suffix 'LMX' indicates power-on reset to mid-scale in external reference mode. Confirm the 'H' grade corresponds to the automotive temperature range (-40°C to 125°C). Ensure the '#PBF' designation matches lead-free requirements for the target assembly process.

Selection Notes

Select this part for applications requiring four independent 8-bit DAC channels with low crosstalk (3nV•s). The LMX variant is suitable when outputs must initialize to mid-scale during external reference operation. The H-grade ensures reliability in harsh automotive environments compared to the C-grade commercial version.

Part Context

This component belongs to the LTC2635 family of quad DACs, which also offers 10-bit and 12-bit resolutions. The 'L' suffix denotes a 2.5V full-scale internal reference, while 'H' denotes 4.096V. The 'UD' package code refers to the 16-pin QFN form factor used in this specific part number.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.