LTC2634HMSE-LMX8#TRPBF

Overview

The LTC2634HMSE-LMX8#TRPBF is a quad 8-bit voltage output digital-to-analog converter (DAC) in a 10-lead MSOP package. It features an integrated precision reference with 10ppm/°C drift, providing a full-scale output of 2.5V when using the internal reference. The device operates from a single 2.7V to 5.5V supply and includes rail-to-rail output buffers guaranteed monotonic over the -40°C to 125°C automotive temperature range. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. Power-on reset defaults to mid-scale in external reference mode.

Feature Summary

• Quad 8-bit DACs with integrated 10ppm/°C precision reference
• Rail-to-rail output buffers with ultralow crosstalk (2.4nV•s)
• Automotive grade (-40°C to 125°C) with AEC-Q100 qualification
• 3-wire SPI/MICROWIRE interface with 50MHz clock rate

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging containing 2,500 pieces. Confirm the H-grade designation corresponds to the automotive temperature range of -40°C to 125°C. Ensure the L suffix denotes the 2.5V full-scale internal reference configuration. Check for the MSE package code corresponding to the 10-lead MSOP form factor.

Selection Notes

Select this part for applications requiring four independent 8-bit outputs with high accuracy and low drift. The LMx suffix indicates power-on reset to mid-scale in external reference mode; choose MI if internal reference mid-scale reset is preferred. Verify supply voltage requirements, as the L-series supports 2.7V to 5.5V, unlike the H-series which requires 4.5V minimum. Consider the MSOP package for space-constrained designs compared to the QFN option.

Part Context

This component belongs to the LTC2634 family of quad DACs, which also offers 10-bit and 12-bit resolutions. Variants include the LTC2634UD for QFN packaging and different temperature grades such as C (Commercial) and I (Industrial). The HMSE suffix specifically identifies the Automotive grade, MSOP package, External reference mid-scale reset, and 8-bit resolution combination within this product line.

Replacement Considerations

Direct substitutes within the same family include LTC2634IMSE-LMX8#TRPBF for industrial temperature range or LTC2634HMSE-LMI8#TRPBF for internal reference mid-scale reset. For higher resolution needs, consider the 10-bit LTC2634IMSE-LMX10#TRPBF or 12-bit LTC2634IMSE-LMX12#TRPBF. Package variations like the 16-lead QFN (LTC2634HUD...) require schematic and footprint adjustments.