LTC2635CMSE-HMI12#PBF

Overview

The LTC2635CMSE-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 2.5V and operates from a single 2.7V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over –40°C to 125°C, and ultralow crosstalk between DACs (3nV•s). Communication occurs via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. A power-on reset circuit defaults outputs to mid-scale in internal reference mode.

Feature Summary

• Quad 12-bit resolution with maximum INL error of ±2.5 LSB
• Integrated 2.5V full-scale reference with 10ppm/°C drift
• Rail-to-rail output buffers with 0.75mV P-P noise (0.1Hz to 200kHz)
• I²C interface with selectable power-on reset to zero-scale, mid-scale, or high-impedance

Applications

• Mobile communications
• Process control and industrial automation
• Power supply margining
• Portable equipment
• Automotive systems

Procurement Notes

Verify the specific suffix HMI12 corresponds to the intended power-on reset behavior (mid-scale in internal reference mode) and resolution (12-bit). Confirm the MSE package designation matches the required 10-lead MSOP form factor. Ensure the C-grade temperature range (0°C to 70°C) meets application requirements, as the datasheet specifies this grade for the CMSE variant.

Selection Notes

Select the LTC2635-L series for 2.7V to 5.5V operation with a 2.5V full-scale output. Choose the H-series only if 4.5V to 5.5V supply and 4.096V full-scale are required. Verify that the I²C address configuration pins (CA0, CA1, CA2) can be set appropriately for the system topology. Consider the external reference option if higher accuracy or different voltage ranges are needed.

Part Context

This component belongs to the LTC2635 family of quad DACs, which also offers 10-bit and 8-bit resolutions. The family shares similar architectural features, including the integrated low-drift reference and I²C interface. The primary distinctions among variants lie in resolution, full-scale voltage options (L vs. H grades), and power-on reset states.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify pin compatibility and electrical specifications when considering alternative quad DACs from other manufacturers.