LTC2634HMSE-HMX8#TRPBF

Overview

The LTC2634HMSE-HMX8#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 4.096V when using the internal reference. The device operates on a single 4.5V 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)
• AEC-Q100 qualified for automotive applications (-40°C to 125°C)
• SPI/MICROWIRE compatible 3-wire serial interface up to 50MHz

Applications

• Automotive systems
• Process control and industrial automation
• Portable equipment

Procurement Notes

Verify the H-grade temperature rating (-40°C to 125°C) and MSE package type against design requirements. Confirm that the power-on reset behavior matches system initialization needs, as this suffix resets to mid-scale in external reference mode. Ensure supply voltage constraints (4.5V to 5.5V) are met for specified performance.

Selection Notes

Select this part for applications requiring four independent 8-bit outputs with high accuracy and automotive reliability. The H-grade variant supports higher supply voltages (4.5V–5.5V) compared to the L-grade. Consider the MSOP package if board space allows slightly larger footprints than QFN, or if specific pinout preferences exist. Verify compatibility with the host controller's SPI timing parameters.

Part Context

This component belongs to the LTC2634 family of quad DACs, which offers various resolutions (8-, 10-, 12-bit), packages (QFN, MSOP), and temperature grades (C, I, H). The HMSE suffix specifically denotes the H-grade automotive version in the 10-lead MSOP package with 8-bit resolution and mid-scale external reference reset behavior.

Replacement Considerations

Direct replacements within the same family include other LTC2634 variants with different resolutions or packages, such as LTC2634HMX10#TRPBF (10-bit) or LTC2634HUD-HMX8#TRPBF (QFN package). Cross-family replacements like the LTC2654 or LTC2655 offer higher resolutions but may differ in interface or pinout.