LTC2635CMSE-HMI8#PBF

Overview

The LTC2635CMSE-HMI8#PBF 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 a full-scale output of 2.5V and a temperature coefficient of 10ppm/°C. The device operates from a single 2.7V to 5.5V supply and communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 125°C automotive temperature range, and a power-on reset circuit configured to reset outputs to mid-scale.

Feature Summary

• Quad 8-Bit Resolution with Integrated 2.5V Precision Reference
• Automotive Temperature Range (–40°C to 125°C)
• Power-On Reset to Mid-Scale in Internal Reference Mode
• Rail-to-Rail Output Buffers with Ultralow Crosstalk (3nV•s)

Applications

• Process Control and Industrial Automation
• Portable Equipment
• Automotive Systems

Procurement Notes

Verify that the MSE package designation corresponds to the 10-lead MSOP form factor. Confirm the H suffix indicates the automotive grade operating range of –40°C to 125°C. Ensure the MI suffix matches the required mid-scale power-on reset behavior for internal reference applications.

Selection Notes

Select this part when four independent 8-bit DAC channels are required in a compact surface-mount package. The H-grade variant is necessary for environments exceeding 70°C. The MI reset option ensures predictable startup states at mid-scale, suitable for biasing applications where zero-scale or high-impedance states are undesirable.

Part Context

This component belongs to the LTC2635 family of quad DACs, which also offers 10-bit and 12-bit resolutions. The CMSE-HMI8#PBF specifically denotes the commercial temperature grade base (though H overrides this for automotive), 8-bit resolution, MSOP package, and automotive grade extension. Other variants include QFN packages and different reset configurations like zero-scale or high-impedance.

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2635CMSE-LMI8#PBF (commercial grade, same reset) or LTC2635CMSE-HZ12#PBF (12-bit resolution, zero-scale reset). Verify thermal management requirements as the MSOP package has a junction-to-ambient thermal resistance of 35°C/W.