LTC2635HMSE-LMI8#PBF

Overview

The LTC2635HMSE-LMI8#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 4.5V to 5.5V supply, includes rail-to-rail output buffers, and guarantees monotonicity over the –40°C to 125°C automotive temperature range. Communication is handled via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Power-on reset options include mid-scale initialization.

Feature Summary

• Quad 8-Bit Resolution with Integrated 2.5V Reference
• Automotive Temperature Range (–40°C to 125°C)
• I²C Interface with Standard and Fast Modes
• Rail-to-Rail Output Buffers Guaranteed Monotonic

Applications

• Process Control and Industrial Automation
• Power Supply Margining
• Portable Equipment

Procurement Notes

Verify the specific suffix LMI8 corresponds to the Mid-Scale internal reference power-on reset configuration for the 8-bit resolution variant. Confirm the MSE package designation matches the 10-lead MSOP physical footprint required for the target PCB layout. Ensure the H-grade specification aligns with the required 4.5V to 5.5V operating voltage range.

Selection Notes

Select this component when four independent 8-bit DAC channels are required within an automotive temperature environment. The internal 2.5V reference simplifies design by eliminating external reference components. Verify that the system supply voltage remains within the 4.5V to 5.5V range specified for the H-grade device to ensure proper operation of the integrated reference and output drivers.

Part Context

This part belongs to the LTC2635 family of quad DACs, which also offers 10-bit and 12-bit resolutions. The family shares common architectural features such as the I²C interface and low crosstalk specifications. Variants differ primarily in resolution, full-scale voltage (2.5V or 4.096V), and power-on reset behavior defined by the ordering suffixes.

Replacement Considerations

Direct pin-compatible replacements within the same family include other LTC2635 variants with different resolutions (e.g., LTC2635HMI10, LTC2635HMI12) or reset configurations (e.g., LTC2635HZ8). Cross-family replacements require verification of I²C compatibility and output buffer characteristics.