LTC2634HMSE-HMI12#PBF

Overview

The LTC2634HMSE-HMI12#PBF is a quad 12-bit voltage output digital-to-analog converter (DAC) in a 10-lead MSOP package. It features an integrated precision reference with a full-scale output of 4.096V and operates from a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the -40°C to 125°C temperature range, and communicates via a 50MHz SPI/MICROWIRE compatible 3-wire serial interface. Power-on reset defaults to mid-scale in internal reference mode.

Feature Summary

• Quad 12-bit resolution with maximum INL error of ±2.5 LSB
• Integrated 4.096V full-scale reference with 10ppm/°C drift
• Rail-to-rail output buffers with ultralow crosstalk (2.4nV•s)
• Power-on reset to mid-scale in internal reference mode

Applications

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

Procurement Notes

Verify the H-grade 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 4.096V full-scale configuration. Ensure PCB layout accommodates the 10-lead MSOP footprint and exposed pad grounding.

Selection Notes

Select this part when four independent 12-bit channels are needed with high accuracy and low noise. The H-grade variant is suitable for automotive or harsh industrial environments requiring operation up to 125°C. Choose this model over the L-grade if a 4.096V output span is required rather than 2.5V.

Part Context

This component belongs to the LTC2634 family of quad DACs, which also offers 10-bit and 8-bit resolutions. Variants include QFN packages and different power-on reset behaviors (zero-scale vs. mid-scale). The HMSE suffix specifically denotes the H-grade temperature range, MSOP package, mid-scale internal reset, 10-bit equivalent pinout compatibility, and 12-bit resolution.

Replacement Considerations

Direct substitutes within the same family include LTC2634IMSE-HMI12#PBF (I-grade, -40°C to 85°C) or LTC2634HMSE-HMX12#PBF (external reference reset). Cross-package replacements like LTC2634HUD-HMI12#PBF require adapter solutions due to the QFN package difference.