LTC2634CMSE-LMX8#TRPBF

Overview

The LTC2634CMSE-LMX8#TRPBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 2.5V and operates on a single 2.7V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the temperature range, and low noise characteristics. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. This specific variant utilizes a 10-lead MSOP package, operates within the commercial temperature range of 0°C to 70°C, and resets to mid-scale in external reference mode upon power-up.

Feature Summary

• Quad 8-bit DACs with integrated 2.5V full-scale precision reference
• Rail-to-rail output buffers with guaranteed monotonicity
• 3-wire SPI/MICROWIRE serial interface with 50MHz clock rate
• Power-on reset to mid-scale in external reference mode

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment

Procurement Notes

Verify the component matches the specified 10-lead MSOP package and commercial temperature grade. Confirm the ordering suffix indicates tape and reel packaging for automated assembly. Ensure the part number corresponds to the LMX8 configuration for mid-scale reset in external reference mode.

Selection Notes

Select this model when a quad 8-bit resolution is sufficient for the application. The L suffix denotes a 2.5V full-scale output suitable for 2.7V to 5.5V supplies. Choose the MSE package for smaller footprint requirements compared to the QFN option. Verify that the mid-scale power-on reset behavior aligns with system initialization needs.

Part Context

This component belongs to the LTC2634 family of quad DACs, which offers various resolutions including 8, 10, and 12 bits. The family shares common architectural features such as integrated references and serial interfaces but differs in accuracy, supply voltage ranges, and package options. The CMSE designation specifically identifies the commercial grade, MSOP package, and 8-bit resolution variant.

Replacement Considerations

Direct replacements within the same family include other LTC2634 variants with different resolutions or reset configurations. Cross-family alternatives may include the LTC2635, which uses an I2C interface instead of SPI. Verify pin compatibility and electrical specifications before substitution.