LTC2634HMSE-HMX10#PBF

Overview

The LTC2634HMSE-HMX10#PBF is a quad 10-bit voltage output digital-to-analog converter (DAC) in a 10-lead MSOP package. It features an integrated precision reference providing a 4.096V full-scale output, operating from a 4.5V to 5.5V supply. The device includes rail-to-rail output buffers and guarantees monotonicity over the -40°C to 125°C temperature range. Communication occurs via a 50MHz SPI/MICROWIRE compatible 3-wire serial interface. Power-on reset defaults to mid-scale in external reference mode.

Feature Summary

• Quad 10-bit resolution with ±1 LSB maximum INL error
• Integrated 10ppm/°C precision reference for 4.096V full-scale output
• Rail-to-rail output buffers with ultralow crosstalk (2.4nV•s)
• Power-on reset to mid-scale in external reference mode

Applications

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

Procurement Notes

Verify the H-grade automotive temperature rating (-40°C to 125°C) and MSE package type against design requirements. Confirm that the system power supply remains within the 4.5V to 5.5V range required for the H-series full-scale operation. Ensure PCB layout accommodates the exposed pad ground connection for thermal management.

Selection Notes

Select this part when four independent 10-bit channels are required with high accuracy and wide temperature tolerance. The H suffix indicates a 4.096V internal reference, necessitating a minimum 4.5V supply. Choose the MSE package for smaller footprint compared to QFN options. Verify compatibility with the 3-wire serial interface timing constraints up to 50MHz.

Part Context

This component belongs to the LTC2634 family of quad DACs, which also offers 8-bit and 12-bit resolutions. Variants exist with different full-scale voltages (2.5V or 4.096V), power-on reset behaviors, and package types (QFN or MSOP). The HMSE designation specifically identifies the H-grade, 10-bit, external-reference-reset, MSOP version.

Replacement Considerations

Direct substitutes include other LTC2634 variants with matching resolution and package, such as LTC2634IMSE-HMX10#PBF (Industrial grade) or LTC2634CUD-HMX10#PBF (Commercial grade, QFN). Cross-package replacements require schematic review for pinout differences between MSOP and QFN.